Paradyne COMSPHERE 3920PLUS Series Technical Reference Manual Download Page 1

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COMSPHERE

392

LUS

MODEMS

MODELS 3920P

LUS

AND 3921P

LUS

TECHNICAL REFERENCE MANUAL

Document No. 3920-A2-GH30-40

Summary of Contents for COMSPHERE 3920PLUS Series

Page 1: ...COMSPHERE 392XPLUS MODEMS MODELS 3920PLUS AND 3921PLUS TECHNICAL REFERENCE MANUAL Document No 3920 A2 GH30 40 ...

Page 2: ...COMSPHERE 392xPLUS MODEMS MODELS 3920PLUS AND 3921PLUS TECHNICAL REFERENCE MANUAL Document No 3920 A2 GH30 40 October 1998 ...

Page 3: ... www paradyne com H Via Telephone Call our automated call system to receive current information via fax or to speak with a company representative Within the U S A call 1 800 870 2221 Outside the U S A call 1 727 530 2340 Trademarks All products and services mentioned herein are the trademarks service marks registered trademarks or registered service marks of their respective owners COPYRIGHT E 199...

Page 4: ...ervice personnel 6 General purpose cables are provided with this product Special cables which may be required by the regulatory inspection authority for the installation site are the responsibility of the customer 7 When installed in the final configuration the product must comply with the applicable Safety Standards and regulatory requirements of the country in which it is installed If necessary ...

Page 5: ...MFUL INTERFERENCE TO RADIO COMMUNICATIONS OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE HARMFUL INTERFERENCE IN WHICH CASE THE USER WILL BE REQUIRED TO CORRECT THE INTERFERENCE AT HIS OWN EXPENSE THE AUTHORITY TO OPERATE THIS EQUIPMENT IS CONDITIONED BY THE REQUIREMENTS THAT NO MODIFICATIONS WILL BE MADE TO THE EQUIPMENT UNLESS THE CHANGES OR MODIFICATIONS ARE EXPRESSLY APPR...

Page 6: ...ment Requirements and Equipment Return 1 10 Technical Specifications 1 13 2 Modem Installation Overview 2 1 392xPlus Modem Package 2 1 Model 3920Plus Modem Installation 2 3 Connecting Cables to the Model 3920Plus Modem 2 3 Removing and Replacing the Model 3920Plus Modem 2 8 Model 3921Plus Modem Installation 2 8 Removing the Model 3921Plus Modem 2 13 392xPlus Modem Power Up 2 13 Selecting Factory C...

Page 7: ...anch 6 1 7 Control Branch Control Branch 7 1 8 Test Branch Test Branch 8 1 9 Sub Network Health and Status Branch Sub Network Health and Status Branch 9 1 10 Call Setup Branch Call Setup Branch 10 1 11 Talk Data Branch Talk Data Branch 11 1 12 Dial Access Security Overview 12 1 Security Branch 12 5 Security Configuration Options 12 14 Security Password Entry Techniques 12 16 Database Table Example...

Page 8: ...delines 14 2 AT Command List 14 5 S Register List 14 16 Appendices A Menu Tree A 1 B Troubleshooting B 1 C Pin Assignments C 1 D ITU T V 25bis Dialing Commands and Responses D 1 E ASCII Character Table E 1 F Default Configuration Options F 1 G Sample Configurations G 1 H Synchronous Data Compression H 1 I Equipment List I 1 Glossary Index ...

Page 9: ...Pattern Test and Digital Loopback Test 8 9 8 6 End to End Pattern Test 8 9 10 1 Dial Backup 10 5 C 1 VF Pin Orientation C 3 C 2 Wiring Diagram Y Cable for External Telephone C 4 C 3 Wiring Diagram 8 Position to 6 Position Crossover Cable C 5 C 4 Wiring Diagram 25 Pin Crossover Cable C 6 G 1 Sample Configuration Point to Point G 2 G 2 Sample Configuration Extended Point to Point G 4 G 3 Sample Conf...

Page 10: ...ration Options Singleport Mode 5 37 5 8 DTE Dialer Configuration Options Singleport Mode 5 45 5 9 Line Dialer Configuration Options Singleport Mode 5 49 5 10 Dial Line Configuration Options Singleport Mode 5 53 5 11 Leased Line Configuration Options Singleport Mode 5 57 5 12 V 42 MNP Buffer Configuration Options Singleport Mode 5 64 5 13 Test Configuration Options Singleport Mode 5 71 5 14 Miscell...

Page 11: ...E Connection B 3 B 5 Modem VF Connection B 4 B 6 Online Operation B 5 B 7 Misc Operation B 5 B 8 Mux Operation B 6 C 1 EIA 232 D Pin Assignments C 2 C 2 VF Connector Pin Assignments C 3 D 1 V 25bis Commands D 6 D 2 V 25bis Response Messages D 7 E 1 ASCII Characters E 1 F 1 Factory Default Configuration Options F 2 H 1 SDC Negotiation Configuration Scenarios H 7 ...

Page 12: ...branch of the DCP menu Chapter 5 provides the information required to set configuration options in the 392xPlus modems using the modem s diagnostic control panel Chapter 6 provides information about the Poll List branch of the DCP menu Chapter 7 provides information about the Control branch of the DCP menu Chapter 8 provides information about the Test branch of the DCP menu Chapter 9 provides info...

Page 13: ...e Glossary provides a description of terms used throughout this manual Related Documents 3000 A2 GA31 COMSPHERE 3000 Series Carrier Installation Manual 3610 A2 GZ45 3600 Hubbing Device Feature Number 3600 F3 300 Installation Instructions 3920 A2 GK40 COMSPHERE 3900 Series Modems Model 3921Plus Ferrite Choke Installation Instructions 3920 A2 GK41 COMSPHERE 392xPlus Modems Models 3920Plus and 3921Pl...

Page 14: ...networks with data rates as high as 33 600 bps Through downloading capability any 392xPlus modem is upgradable to the latest firmware requiring no new hardware investment or on site personnel with little or no downtime refer to Chapter 3 DCP Operation for more information regarding downloading options The 392xPlus modems support a wide range of modulation schemes and offer control using either AT ...

Page 15: ...modems refers to all 3920Plus and 3921Plus models Model 3920Plus Standalone Singleport Modems The Model 3920Plus singleport Figures 1 1 and 1 2 is a standalone modem capable of either 4 wire 2 wire leased line or dial operation This modem is controlled using either AT commands or the DCP The DCP consists of a liquid crystal display LCD three function keys four directional keys and a row of 13 LED ...

Page 16: ...ly V 32 family or TMp modulation The TDM MSD multiplexer commonly referred to as mux can be enabled or disabled to allow a greater degree of application flexibility The 3920Plus multiport modem also operates over a 4 wire 2 wire leased or dial network and is controlled using the same DCP employed on the Model 3920Plus singleport standalone modem DIAGNOSTIC CONTROL PANEL LCD AND KEYPAD STATUS INDIC...

Page 17: ...audio speaker jack for the carrier s optional speaker The modem s back panel has two edge card connectors that mount into a connector plate This connector plate has two DB 25 S connectors one providing an EIA 232 D DTE interface and one for future functionality FACEPLATE 496 14178a 04 EIA232 V 24 EDGE CARD CONNECTOR FUTURE USE BACK CONNECTOR PLATE V 35 3600 3500 RS366A V 25 3800 EIA232 V 24 TXD RX...

Page 18: ...as two DB 25 S connectors providing four EIA 232 DTE interfaces Both the singleport and multiport Model 3921Plus modems derive ac power from the COMSPHERE 3000 Series Carrier s backplane which is a common bus to all devices installed in the carrier The user interface to any Model 3921Plus modem is through the shared diagnostic control panel SDCP an optional feature which operates in a manner simil...

Page 19: ...Disable Multiport Operates only on the multiport modem models Multiport mode is in effect when the MUX Mode configuration option is set to TDM MSD or DTE_Bridge It supports from one to four ports DTE 1 4 depending on how the modem is configured Using Table 1 1 identify your modem s operational mode based on the 392xPlus modem model and its selected MUX mode configuration option Table 1 1 392xPlus ...

Page 20: ...kup with standby capabilities for 4 wire 2 wire leased line applications The backup facility may be either a 2 wire dial line or a 2 wire leased line 392xPlus Singleport Modem Features Features specific to 392xPlus singleport modems are Four wire two wire leased line modulations Dial line modulations Refer to Table 1 2 in the Technical Specifications section of this chapter for leased and dial lin...

Page 21: ...ol the backup function as if it were a normal dial backup MSD The Modem Sharing Device MSD is only available in 392xPlus multiport modems It allows from 2 to 4 physical ports to share a communication channel When the MUX Mode option is set to TDM MSD on a tributary and at least one port has the MSD mode setting enabled then MSD is enabled For more information refer to the Multiport Mode section of...

Page 22: ...etric rates automatic adjustment of the transmit power level and automatic adjustment of the symbol baud rate for optimal data throughput These automatic adjustments are made during the training or modem synchronization phase via special line probing techniques that establish the top most viable rate of operation Due to these techniques true fixed rate operation of the modems using V 34 modulation...

Page 23: ...and carrier mounted modems are available with Synchronous Data Compression SDC Refer to Appendix H Synchronous Data Compression for more information Government Requirements and Equipment Return Certain governments require that instructions pertaining to modem connection to the public switched telephone network be included in the installation and operation manual Specific instructions are listed in...

Page 24: ...equipment If this happens the telephone company will provide advance notice for you to make the necessary modifications in order to maintain uninterrupted service 7 The user is not authorized to repair or modify the equipment 8 This equipment cannot be used on public coin service provided by the telephone company Connection to Party Line Service is subject to state tariffs Contact the state public...

Page 25: ...by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connections of the power utility telephone line and internal metallic wa...

Page 26: ...r off Model 3920Plus Singleport 3920 A2 xxx 8 watts typical including power supply speaker off Model 3921Plus Singleport 4 watts typical each card Speaker consumption is approximately 1 watt at high volume Model 3920Plus Multiport 8 watts typical including power supply speaker off Model 3921Plus Multiport 6 watts typical each card Speaker consumption is approximately 1 watt at high volume DIMENSIO...

Page 27: ...9600 7200 4800 2400 bps Paradyne V 32terbo 19 200 16 800 bps ITU T V 32bis 14 400 12 000 9600 7200 4800 bps ITU T V 32 9600 4800 bps Paradyne Trellis Multipoint 19 200 14 400 9600 7200 4800 2400 bps ITU T V 22bis 2400 bps ITU T V 27bis 4800 2400 bps ITU T V 33 14 400 12 000 bps ITU T V 29 9600 7200 4800 bps Paradyne Point to Point Diagnostic 2400 bps Dial Line Modulations ITU T V 34 33 600 31 200 ...

Page 28: ...lation 2 8 Removing the Model 3921Plus Modem 2 13 392xPlus Modem Power Up 2 13 Selecting Factory Configuration Options 2 13 Using the Diagnostic Control Panel DCP 2 14 Overview This chapter provides a list of equipment supplied with 392xPlus modems as well as a list of customer supplied equipment In addition it describes how to install and remove the 392xPlus modems and how to select a factory pre...

Page 29: ...t or four multiport DB 25 P connectors at one end to attach to the modem One or more of the following modular leased or dial network interfaces JM8 for leased line configurations RJ11C for dial permissive configurations One 8 position 8 wire modular cord for leased backup purposes The following customer supplied equipment is required for the installation of a Model 3921Plus modem A COMSPHERE 3000 ...

Page 30: ...ollowing switches and connectors An ON OFF power switch An 8 pin DIN type power receptacle PWR for the dc power supply An 8 pin modular keyed jack LEASED for 4 wire 2 wire leased lines An 8 pin modular keyed jack DIAL for backup lines 2 wire dial or 2 wire leased A 4 pin modular jack NMS for the Network Management System connection One singleport or four multiport 25 pin DB 25 S receptacles for th...

Page 31: ...NT DB 25 P CONNECTOR SUB MINIATURE 4 POSITION PLUG FOR NETWORK MANAGEMENT SYSTEM OPERATION POWER SUPPLY DIAL NETWORK 6 POSITION PLUG LEASED LINE NETWORK 8 POSITION PLUG OFF DIAL LEASED DTE 1 NMS PWR ON HUBBING DEVICE Figure 2 1 Model 3920Plus Singleport 3920 A2 xxx Back Panel and Power Supply ...

Page 32: ...DUCTOR PLUG 8 POSITION 8 CONDUCTOR PLUG DB 25 P CONNECTOR SUB MINIATURE 4 POSITION 4 CONDUCTOR PLUG POWER SUPPLY POWER CORD 495 14788 HUBBING DEVICE LEASED LINE NETWORK DATA TERMINAL EQUIPMENT DIAL NETWORK 6 POSITION 4 CONDUCTOR PLUG NETWORK MANAGEMENT SYSTEM OR LEASED BACKUP Figure 2 2 Model 3920Plus Multiport Back Panel and Power Supply ...

Page 33: ...crewdriver to secure the cable to the DTE NOTE DTE rates above 19 2 bps require cable lengths less than fifty feet as specified by the RS323 standard Power Supply Connection 3920 A1 xxx Use the following steps to connect the modem to an ac power outlet 1 Make sure the modem is powered OFF 2 Insert the power supply s 8 pin DIN connector into the modem s back panel dc power receptacle labeled PWR Fi...

Page 34: ...ly terminated with a USOC RJ11C jack Leased Backup Connection Use the following steps to connect the modem to the 2 wire leased backup network interface 1 Insert the 8 position 8 conductor modular plug into the jack labeled DIAL Figure 2 1 or 2 2 2 Insert the other end of the modular cord into the leased line network interface Dial Backup Connection Use the following steps to connect the modem to ...

Page 35: ...oved from the carrier The Model 3921Plus modems are designed for installation in a COMSPHERE 3000 Series Carrier which supplies both the operating power and the leased and or dial network connections For additional information about the COMSPHERE 3000 Series Carrier refer to the COMSPHERE 3000 Series Carrier Installation Manual The COMSPHERE 3000 Series Carrier has 17 slots that hold up to 8 Model...

Page 36: ...top and bottom card guides of one of the slots numbered 1 15 Figure 2 4 Slide the modem into the slot aligning the modem with the connector plates until the backplane connector and DTE connector seat firmly into the back of the carrier The faceplate latch automatically closes as you push the modem into the carrier To lock the modem into the carrier press the faceplate latch until a click is heard ...

Page 37: ...1998 3920 A2 GH30 40 3000 SERIES CARRIER MODEL 3921Plus MULTIPORT MODEM LATCH CIRCUIT CARD GUIDES 495 14708 SDU MODEL 3921Plus SINGLEPORT MODEM LATCH CIRCUIT CARD GUIDES SDU 3000 SERIES CARRIER Figure 2 4 Installing the Model 3921Plus Modem ...

Page 38: ...ou have more than one carrier press the key to move the cursor to the carrier selection position 1 on the first LCD line in the following screen example F1 Carr Slot 1 01A 1 01A F2 F3 4 Press the F1 or F2 key until the carrier number you want appears The carrier number selection has a range of 1 to 8 since a single SDCP can control a configuration of up to eight carriers This is only possible if t...

Page 39: ... covers the faceplate latch Figure 2 5 Tighten the retention screw on the circuit pack lock This prevents the modem from accidently being removed once it is installed in a carrier 7 Configure the modem as described in the Selecting Factory Configuration Options section in this chapter 495 14425 02 CIRCUIT PACK LOCK OPEN CLOSED LATCH RELEASE TAB Figure 2 5 Circuit Pack Lock ...

Page 40: ...enu screen F1 Power On Selftst Passed F2 F3 If a failure occurs during the self test the LCD displays Power On Selftst Failed for several seconds The LCD then displays the Top Level menu screen with the message Power on Fail appearing on the top line of the LCD Although a failure has occurred the modem will attempt to operate This allows you to activate a more thorough self test using the Test bra...

Page 41: ...sed or Async Leased is selected you must choose either Answer or Originate mode If TMp is selected you must choose either Control or Trib Tributary mode 3 Press the key until the appropriate factory preset appears on the LCD and press the corresponding function key to select your choice For certain factory presets you will also need to choose the appropriate mode 4 Choose Function appears and disp...

Page 42: ...modem It also describes how to select and use each branch of the Top Level menu tree Diagnostic Control Panels There are two types of diagnostic control panels DCP the DCP on the standalone Model 3920Plus modems and the shared diagnostic control panel SDCP an optional feature used with the Model 3921Plus installed into a COMSPHERE 3000 Series Carrier Both DCPs have a two line 32 character liquid c...

Page 43: ...ins LED status indicators that monitor the operation of the modem After the SDCP is connected to the modem the Front Panel indicator of the selected modem lights to show that the modem is connected Status Indicators The 392xPlus modem status indicators continuously provide information on the modem s operating condition All of the status indicators on the Model 3920Plus appear on the DCP Figure 3 1...

Page 44: ... DSR DTR LSD Pwr Alrm Test Dial RI Busy Serv SQ Status Front Panel Spkr 142 125 103 104 105 106 107 108 109 3921Plus SINGLEPORT MULTIPORT Select SDU 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 COMSPHERE 3000 SELECT KEY STATUS INDICATORS CARRIER SLOTS 1 16 F1 F2 F3 OK Alarm BckUp Test EC NETWORK DEVICE ALARM DIAL BACKUP TEST MODE ERROR CORRECTION OK Alarm BckUp Test EC KEYPAD LCD 496 14676 01 Figure 3 2...

Page 45: ...ved in a test or firmware upgrade Dial yellow Flashing The modem is attempting to establish a call over the dial network or the modem is in Dial Standby mode ON The modem has established a dial connection OFF A dial connection does not exist RI 125 3921Plus only green A ringing signal is being received Busy 3921Plus only yellow The modem is placed in a forced busy condition and is off hook Serv 39...

Page 46: ... the mux ports 1 2 3 or 4 or the Network Management System NMS diagnostic interface 3920Plus only For example when the selected port is Port 1 of the mux the EIA indicators for TXD RXD RTS CTS DSR DTR and LSD will indicate the status of the EIA signals on the Port 1 interface of the multiplexer For information about making this selection refer to Chapter 7 Control Branch To display the port which ...

Page 47: ...e information is available on the LCD than what is currently displayed a hidden choice indicator or appears in the upper right hand corner of the LCD Use the or key to scroll in the indicated direction to display more selections onto the LCD Hidden Choice Indicators The Hidden Choice Indicators serve as an alert that other selections are available besides what is currently displayed on the LCD The...

Page 48: ...eypad The DCP on the Model 3920Plus has seven keys while the optional SDCP of the COMSPHERE 3000 Series Carrier has eight keys The additional key on the carrier is the Select key used to connect the SDCP to a specific slot in the carrier Key The key returns you to the Top Level menu display from anywhere in the menu tree Pressing while changing configuration options displays the message Save Strap...

Page 49: ...ice Select Key Model 3921Plus only The Select key appears on the optional SDCP of the COMSPHERE 3000 Series Carrier It is used to connect the SDCP to a modem in a specific slot in the carrier Menu Structure The menu tree is a hierarchical structure used to display functions that configure and control local and remote 392xPlus modems It is accessed via the DCP and is shown in Appendix A Menu Tree C...

Page 50: ...asting Control Used to control the modem s hardware and software functions Test Used to begin and end various modem tests SubHS Sub Network Health and Status Used to display alarm conditions in downstream modems Call Setup Used to dial disconnect and answer telephone calls as well as store up to 24 telephone numbers in directory locations Talk Data Used to switch the modem between Talk mode the mo...

Page 51: ...s ringing Training The modem is training or retraining EC Negotiating The local and remote modems are negotiating the highest possible level of error control compatible between both modems Once a level is selected this LCD message disappears Dial Backup or Stndby MR The modem is operating in Dial Standby mode Leased Backup DialBckUp MR The modem is operating in a Dial Backup mode at the displayed ...

Page 52: ...ne The modem has aborted the call because it cannot detect a dial tone No Quiet Answer The modem has detected No Quiet Answer before the time out setting of the No Answer Disconnect configuration option Ringback Timeout The answering modem did not answer within the time limit specified by the No Answer Timeout configuration option A ringback signal was detected Trunk Busy The modem is receiving a ...

Page 53: ...Data Disc The modem has disconnected due to a lack of transmitted and received data Disconnecting The modem has begun the disconnect sequence RmtCmnded Disc The modem has disconnected due to a V 32 Cleardown received from the remote modem Talk Mode The modem is in Talk mode Firmware Download Result DownldOnly Mode A local download of firmware or a remote cloning of firmware has failed The modem is...

Page 54: ...limit was exceeded before the modem received a VF password from the originating dialer Unknown DTEpswd The modem did not finish answering a call disconnected because the DTE passwords received from the remote DTE were invalid No Orig PsWd The modem did not attempt to establish a call as requested because the AT dial command did not contain an originate access password Unknown VF PsWd The modem did...

Page 55: ...of two screens appears If the modem is not operating with V 34 modulation the following screen appears F1 Leased 19 2 abbb cdd ee f f f f F2 F3 If the modem is operating with V 34 modulation the following screen appears F1 xxxx yyyyy zz abbb cdd ee f f f f F2 F3 The V 34 modulation Quick Configuration information appears on the LCD s top line NOTE In Dial mode where Automode automatically adapts t...

Page 56: ...Port 3 when TDM MSD is enabled M4 indicates Port 4 when TDM MSD is enabled B1 indicates Port 1 when DTE Bridge is enabled B2 indicates Port 2 when DTE Bridge is enabled ffff Displays the modem s modulation scheme as shown below V34 indicates V 34 family modulation V32t indicates V 32terbo modulation V32b indicates V 32bis modulation V32 indicates V 32 modulation TMp indicates Trellis Multipoint mo...

Page 57: ...COMSPHERE 392xPlus Modems 3 16 October 1998 3920 A2 GH30 40 This page intentionally left blank ...

Page 58: ...e for this function Grant and Deny Grant allows any branch of the Top Level menu to be accessed from the DCP Deny only allows access to the Status branch of the Top Level menu All 392xPlus modems are shipped from the factory with DCP access granted To access the Front Panel DCP Security Access function perform the following Press the key three times Press the key twice Press the key once F1 Frnt P...

Page 59: ...COMSPHERE 392xPlus Modems 3 18 October 1998 3920 A2 GH30 40 ...

Page 60: ...aring VF Counters 4 7 Identity 4 8 DTE 4 9 SDC 4 10 V 34 4 11 Backup 4 13 Options 4 15 Record 4 16 Service Log 4 17 Status Branch The Status branch of the Top Level menu allows you to view the current status of the leased line or dial connection the identity for example serial number and model number of your equipment and the DTE interface 4 ...

Page 61: ...Del EchoFreqOff Phase Hts Impul Hts DropOuts Retrains Phas Jtr NonLinear FreqOffset Gain Hts LSD DTR DSR Tst TXD RXD RTS CTS Display Clear Status Port Select Service_Log V 34 Backup Line Pri 4W APL Line Pri 2W APL Line Bkup 2W APL Line Dial Backup Line Dial ONLY Line No Sync TxRate RxRate SymbolRate Tx Level AsymRate Display Clear Ser Mod FRev HPt FPt Country Tx Rx DTE Rate Cmp Ratio Efficiency SD...

Page 62: ...TS input to the modem was held ON for a period exceeding the time selected by the RTS Antistream configuration option Refer to the DTE Interface section in Chapter 5 Configure Branch for a description of the RTS Antistream configuration option Access Security A dial access security alarm is active Refer to the Security section of this table for dial access security conditions External Alarm A Exte...

Page 63: ...m failed either the Dial Tone Detection or the Ring Tone Detection portion of the Call Test command Dial Make Busy Mode The modem is in a Make Busy condition Service Line Model 3921Plus only The modem installed in a COMSPHERE 3000 Series Carrier has been switched to a service line Short Hold Time The modem s dial hold time has been shortened Non Answering The modem is in a non answering mode Thres...

Page 64: ...in an alarm condition CTS Alarm The alarming DTE port s CTS signal is in an alarm condition RTS Alarm The alarming DTE port s RTS signal is in an alarm condition DSR Alarm The alarming DTE port s DSR signal is in an alarm condition LSD Alarm The alarming DTE port s LSD signal is in an alarm condition Auto Stream Dis The port is disabled due to an antistreaming condition Refer to the Streaming DTE ...

Page 65: ...appears for V 34 V 32terbo V 32bis V 32 and Trellis Multipoint modulations Sig Noise Signal to Noise Ratio displays in decibels the receive signal strength relative to noise on the line This parameter appears for V 34 V 32terbo V 32bis V 32 and Trellis Multipoint modulations NrEchLvl Near End Echo Level displays the signal level in decibels referenced to one milliwatt dBm of that portion of the tr...

Page 66: ...is parameter appears for V 34 family V 32terbo V 32bis V 32 and Trellis Multipoint modulations in 4 wire only Phas Jtr Phase Jitter is the non constant variation in the phase of the receive signal carrier The jitter is typically introduced by analog power supplies and is predominantly sign waves with a frequency of 50 Hz or 60 Hz This parameter appears for V 32terbo V 32bis and V 32 modulations in...

Page 67: ...ty F2 F3 Press the key until Identity appears Select Identity F1 Status Identity Ser 00000000 F2 F3 The modem s serial number appears on the LCD s bottom line Press the key to scroll and view the model number firmware revision level hardware part number and firmware part number Ser Serial number is an 8 digit number that identifies the modem Mod Model number is an alphanumeric number that identifi...

Page 68: ...y Ports 1 and 2 appear when the the DTE Bridge configuration option is enabled This screen does not appear in Singleport mode F1 LSD DTR DSR Tst _ _ F2 F3 The activity and state of the modem s DTE signal appear on the LCD s bottom line Press the key to scroll other signals into view The LCD s bottom line displays a pair of symbols for each interface lead The first symbol indicates the signal s act...

Page 69: ...alid parameters are locked in place until the next connection To access SDC from the Status branch make the following selections F1 Status SDC V 34 F2 F3 Select SDC F1 SDC Performance Tx Rx F2 F3 Select either Tx transmit or Rx receive F1 SDC Perf Rx DTE Rate nnnnnn F2 F3 The DTE Rate appears for the selected SDC Performance Tx or Rx Press the key to view the SDC performance for DTE rate compressi...

Page 70: ...to the DTE This number takes into account only the data between the opening and closing flags of the HDLC frames Flags and DTE interframe time fill are ignored The ratio between the number of bits in the output and input of the decompression algorithm The calculation does not include the overhead of the LAPM frame or the DTE flags and DTE interframe time fill The ratio between the number of bits p...

Page 71: ...e Rate indicates the rate at which the modem is receiving data Possible values are 2400 4800 7200 9600 12 0 12 000 14 4 14 400 16 8 16 800 19 2 19 200 21 6 21 600 24 0 24 000 26 4 26 400 28 8 28 800 31 2 31 200 or 33 6 33 600 bps SymbolRate Symbol Rate indicates the baud rate used by V 34 modulation Refer to ITU T specifications Possible values are 3429 3200L 3200H 3000L 3000H 2800L 2800H 2743L 27...

Page 72: ... appears F1 Status DTE Backup F2 F3 Select Backup F1 Status Backup Line Pri 4w APL F2 F3 The configuration of the current operating line facility either APL primary or backup appears refer to Table 4 3 Press the key to display the next screen F1 Status Backup Bckup 2wAPL Good F2 F3 This screen displays the configuration and condition of the inactive line facility either APL primary or backup There...

Page 73: ...Backup Pri 4w APL XXXX or Pri 2w APL XXXX Good indicates the line condition is good Bad indicates the line condition is bad indicates the line condition is unknown Lease Lookback has not had enough time to make an initial appraisal of the line conditions since the last retrain blank indicates the Lease Lookback option is disabled Refer to the BackupLine Check configuration option in the Multiport ...

Page 74: ...om the Status branch make the following sections F1 Status DTE Options F2 F3 Press the key until Options appears Select Options F1 Options Status V 29 V 33 F2 F3 If optional features are installed in the modem they appear on the LCD s bottom line If other features are installed press the key to scroll other features into view To exit this function and remain in the Status branch press the key To e...

Page 75: ...tile memory and the LCD To access Record from the Status branch make the following selections F1 Status Options Record F2 F3 Press the key until Record appears Select Record F1 Record Status Display Clear F2 F3 To display sequence faults select Display F1 Record Number 1 Modem O K F2 F3 The LCD displays the first sequence fault field Sequence fault fields range from 1 to 8 and are identified by a ...

Page 76: ...Status Service_Log F2 F3 Press the key until Service appears Select Service Log F1 Service Log xx Nxt mm dd yy zz F2 F3 Support personnel will request the applicable information from this screen xx displays the Service Log number mm dd yy displays the date month day year zz displays the Customer Support code number Select Nxt to scroll through the entries in the Service Log To exit this function a...

Page 77: ...COMSPHERE 392xPlus Modems 4 18 October 1998 3920 A2 GH30 40 ...

Page 78: ...gure branch of the Top Level menu via the DCP The Configure branch accesses the Edit Area which is a work space where you view and change the configuration options These configuration options are loaded to the Edit Area from one of five configuration option areas Active Operating Active Saved Customer 1 Customer 2 or Factory Active Operating is a configuration area containing configuration options...

Page 79: ...d start and only require a minimum of changes to the default settings Factory default settings are listed in Appendix F Default Configuration Options Figure 5 1 graphically displays the interaction between the edit area and configuration areas as viewed from the perspective of the DCP CONTENTS OF Active Saved ARE AUTOMATICALLY COPIED TO Active Operating WHEN A SAVE IS COMMANDED VIA THE DCP ON A RE...

Page 80: ...st Control Test SubHS Call_Setup Tlk Data Security Remote Configure Ld EditArea frm Activ Operating Active Saved Customer1 Customer2 Factory Choose Function Sync_Leased Async_Leased TMp Sync_Dial UNIX_Dial Async_Dial Choose Mode Control Trib Choose Mode Edit StrapGroup Answer Originate Save Active Saved Customer1 Customer2 DTE_Interface Line_Dialer Leased_Line Test Security DTE_Dialer Dial_Line V4...

Page 81: ...ing this branch Editing and Saving a Configuration Option The following example shows how to change the Remote Access Password using the DCP If you intend to access another 392xPlus modem via the Remote branch of the Top Level menu the Remote Access Password must be the same for both modems By following these procedures you learn how to load a factory preset configuration area in this case Sync Le...

Page 82: ...Leased F2 F3 Select Sync_Leased F1 Choose Mode Answer Originate F2 F3 Select Answer F1 Choose Function Edit Save F2 F3 Select Edit F1 Edit StrapGroup DTE_Interface F2 F3 F1 Edit StrapGroup Test Misc F2 F3 Scroll across the LCD and select the Misc configuration options group ...

Page 83: ...F2 F3 Select Nxt until RemAccssPasswrd appears F1 RemAccssPasswrd Nxt 10000000 F2 F3 Select the F2 key to increment password values F1 RemAccssPasswrd Nxt 10000000 F2 F3 Press the key to move the cursor to the next position F1 RemAccssPasswrd Nxt 12345678 F2 F3 Continue this sequence until you have entered the new password value ...

Page 84: ...ting Nxt pressing F1 and scrolling down to the next configuration option Second it indicates that what is displayed on the LCD is the current setting If you scroll left or right Nxt disappears and reappears if a new value is selected End appears when you have scrolled down to the last configuration option available in that group Selecting End returns you to the top of the configuration group You a...

Page 85: ...port mode Throughout these tables two selections frequently appear on the LCD Enable and Disable Unless otherwise stated Enable selects a configuration option and makes it available for use Disable makes a configuration option unavailable for use NOTE In some countries the range of allowable values for some configuration options is restricted The modem accepts any selection but sets the configurat...

Page 86: ...n NetMngmtAddress Diag Connection Mixed Trib F W Link Delay sec Multiport Mode V 42 MNP Buffer MUX MUX Mode TDM MSD DTE Bridge Tx Clock Source Port4 Ext Alarm Bakup_TXClk_Src CT111_Rate Cntl MSD Port Control Copy From Port X To Port X or All Port 1 Port 2 Port 3 Port 4 Rate Async EIA Port MSD Mode Rate at 33 6 K Rate at 28 8 K Rate at 24 0 K Rate at 19 2 K Rate at 16 8 K Rate at 14 4 K Rate at 12 ...

Page 87: ...ed as the MSD output port Disable Disables MUX Mode on the modem Refer to the Singleport Mode section in this chapter for the mux disabled configuration options DTE Bridge Enables the modem as a digital bridge for dial backup of a multipoint configuration by bridging the signal on the digital side of the Front End Processor FEP modems In this configuration only two ports can be used on the control...

Page 88: ...is enabled Ports 2 3 and 4 are not available Internal The transmit data s clock source is derived from the modem s internal clock This clock is available as an output on Pin 15 TXC of the EIA 232 D interface Receive Clock Loop The modem s transmit clock is derived from its received analog signal The derived clock is available as an output on Pin 15 TXC of the EIA 232 D interface Port1 The transmit...

Page 89: ...led for Ports 2 3 and 4 only Port 2 rates are available NOTE When using TMp modulation on a tributary modem port rates are not available when the Modem MSD configuration option is disabled Rate at 33 6 K Nxt Disable 33600 28800 24000 19200 16800 14400 12000 9600 7200 4800 2400 1200 Rate at 33 6K When the modem rate is 33 600 bps the port rate will be as selected by this configuration option Disabl...

Page 90: ...ed the modem rate of 7200 bps Rate at 4800 Nxt Disable 4800 2400 1200 Rate at 4800 When the modem rate is 4800 bps the port rate will be as selected by this configuration option Disable or 4800 to 1200 The total for all ports cannot exceed the modem rate of 4800 bps Rate at 2400 End Disable 2400 1200 Rate at 2400 When the modem rate is 2400 bps the port rate will be as selected by this configurati...

Page 91: ... interface of the port It accomplishes this by shortening the duration of the stop bit 1 0 Causes the stop bit to be shortened to 87 5 of its original duration 2 3 Causes the stop bit to be shortened to 75 of its original duration Port EIA Sub Group One for Each Port DTR Action Ignore Nxt Ignore Stndrd_RS232 CntrlsOnHook Data Terminal Ready Action DTR is a signal from the DTE to the modem indicati...

Page 92: ...ore Sim_Cntl_Car Request to Send Action RTS is a signal from the DTE indicating the DTE has data to send Standard RS232 Allows the DTE to control RTS to the modem in normal EIA 232 D operation RTS must be ON for the DTE to transmit to the modem Ignore Modem assumes RTS is always ON Use this selection when the DTE does not provide RTS to the modem Simulated Control Carrier RTS input controls the re...

Page 93: ...tion and the CTS Control configuration options must be set to Stndrd RS232 If RTS Action is set to Ignore RTS is always ON and this configuration option has no effect LSD Control Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Sim_Cntl_Car DTR DiscOFF Line Signal Detect Control LSD is a signal indicating that the carrier signal is being received from the remote modem It is normall...

Page 94: ...ble The DTE s CT111 signal may be used in conjunction with CT111 Rate Control refer to the MUX Sub Group section of this table to control modem rate Disable Disregards the DTE s CT111 signal Rcv Remote Loop Enable Nxt Enable Disable Receive Remote Loopback Response Determines if the modem responds to a request for a remote loopback issued from a remote modem DTE RL CT140 Disable Nxt Disable Enable...

Page 95: ...nable or disable the reporting of DTE alarms per port to the front panel and or NMS Enable Does not report alarms Disable Reports alarms Extend Main Ch Disable Nxt Disable Enable Primary data can only be extended one link Extend Main Channel Supports extended diagnostics Specifies whether there is main primary channel connectivity between the modem s DTE ports and the DTE ports of modems one level...

Page 96: ...is option is set to 2 then the answering modem answers after the second ring NOTE The range of allowable values may be restricted in some countries Disable If selected the modem must be answered using either the DCP s Answer command or the Talk Data function Refer to Chapter 11 Talk Data Branch for more on Manual Answer Dialer Type Tone Nxt Tone Pulse Dialer Type Selects either tone DTMF dialing o...

Page 97: ...ast Disconnect Disable Nxt Disable Enable Fast Disconnect Allows the modem to disconnect immediately after receiving a disconnect command from a local DTE or its own diagnostic control panel Disable The modem follows its normal disconnect sequence by issuing a cleardown sequence or long space disconnect This is also known as a graceful disconnect since the other modem receives advance notice of a ...

Page 98: ...hod of disconnecting a call NOTE The range of allowable values may be restricted in some countries 2 5 10 20 sec Modem disconnects if carrier turns OFF for more than 2 seconds 5 seconds 10 seconds or 20 seconds Disable Modem does not disconnect if carrier turns OFF No Data Disc Disable Nxt Disable 10min 30min 60min No Data Disconnect Forces the modem to disconnect if no data is transmitted and rec...

Page 99: ...changes do not take effect until a disconnect occurs NOTE Certain changes to this configuration option will cause the modem to reset 33600 V34 28800 V34 24000 V34 21600 V34 19200 V34 16800 V34 14400 V34 12000 V34 9600 V34 7200 V34 4800 V34 2400 V34 The modem operates using V 34 modulation at the data rate selected 19200 V32t 16800 V32t 14400 V32b 12000 V32b 9600 V32b 7200 V32b 4800 V32b The modem ...

Page 100: ...ks Short Allows the modem to train up faster when using V 32terbo V 32bis or V 32 modulation V34 Symbol Rate Automatic Nxt Automatic 3429H 3429L 3200L 3200H 3000L 3000H 2800L 2800H 2743L 2743H 2400L 2400H This configuration option only appears when V 34 is enabled V 34 Symbol Rate Selects the symbol or baud rate to be used when operating with V 34 modulation on either dial or leased lines Automati...

Page 101: ...abling the Asymmetric Rate configuration option NOTE This configuration option is typically disabled when the MUX is in use and it is enabled when the MUX is disabled If you are using a factory template that has the MUX enabled and then you manually disable the MUX you must verify that this configuration option is set to the correct value Proact Retrain Enable Nxt Enable Disable Proactive Retrain ...

Page 102: ...V34 2400 V34 The modem operates using V 34 modulation at the data rate selected NOTE Make sure that the Backup Line Check configuration option is disabled before attempting to change from V 32 to V 34 modulation Otherwise the Invalid Strap message appears 19200 V32t 16800 V32t 14400 V32b 12000 V32b 9600 V32b 7200 V32b 4800 V32b The modem operates using V 32bis or V 32terbo modulation at the data r...

Page 103: ... to Point Diagnostic 2400 bps modulation Allows the modem to use a non standard point to point modulation capable of secondary channel diagnostics while running at 2400 bps NOTE This configuration option must be the same in both the local and remote modems Leased Tx Level 0 Nxt 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Leased Transmit Level Selects the modem s transmit power level over leased lines Th...

Page 104: ... the first number in directory location one 1 If the call fails the modem continues to dial the number in directory one every two minutes For example the limitation is a ten call attempt to the same number with a two minute delay between calls If the call is not successful after the tenth attempt the modem waits two hours then resumes calling NOTE Regulations for the Auto Dial Back operation varie...

Page 105: ...ation allows the leased line modems to return service to the original point to point modems NOTE When the modems are set for normal dial standby 15min 1hr 4hr or Test 2min the Special Standby configuration option allows the originate modem to test the lease connection in one direction before interrupting primary data on the dial lines NOTE When the modems are set for advanced dial standby Adv 15mi...

Page 106: ...ine Allows the 2 wire backup facility to function as a 2 wire leased line facility When this configuration option is disabled the backup facility is a 2 wire dial line NOTE Plug the leased line into the jack labeled DIAL on the rear panel of the modem see Figure 2 1 in Chapter 2 Except for dialing ring indication and call progression functions you control the backup function as if it were a normal...

Page 107: ...n the modulation is TMp V 54 Address Determines which remote 392xPlus modem is placed into a remote loopback test This test can be either a remote digital loopback or local analog loopback This type of addressing should be used for extended data circuits tail circuits Disable This is used for normal point to point leased line and dial networks Address Values 01 03 05 07 09 0B 0D 0F 11 13 15 17 19 ...

Page 108: ...from a known condition after every call Speaker Control OnUntilCarr Nxt OnUntilCarr Off On Speaker Control Determines if the speaker is OFF ON until carrier signal is received by the modem or ON all the time NOTE Speaker Control can also be temporarily set using the Control branch however a reset or power cycle will restore the modem to the Speaker Control and Speaker Volume configuration option s...

Page 109: ...de Disable No callback directory number or remote access password reception are required to answer a call The Dir 1_Callback configuration option can be used or no callback security can be used RemAccsPswd The modem uses its remote access password A matching remote access password must be transmitted as an 8 digit tone from the originating modem like a VF password before the answering modem will a...

Page 110: ...activity such as Call Connect messages to the NMS Call Connect Progress Enables both Call Connect and Call Progress information to be transmitted to the NMS Disable Modem status and call summary information is not sent to the NMS Call Connect Only The modem accumulates call statistics over a period of time and then transmits a summary of these statistics to the NMS The NMS uses this data to produc...

Page 111: ...E Changes to this configuration option will cause the modem to reset Modem DC Selects the Diagnostic Channel NMS CC Selects the Control Channel Disable Prevents messages being sent from the diagnostic port Mixed Trib F W No Nxt No Yes This configuration option is only available when the modem is configured for TMp Control Mixed Tributary Firmware Establishes that a multipoint network has TMp tribu...

Page 112: ... nine groups based on functionality DTE Interface Table 5 7 DTE Dialer Table 5 8 Line Dialer Table 5 9 Dial Line Table 5 10 Leased Line Table 4 11 V 42 MNP Buffer Table 5 12 Test Table 5 13 Misc Table 5 14 Security Chapter 12 Dial Access Security The following graphic represents the structure of the configuration options in Singleport mode ...

Page 113: ...54 Address V54 Device Type Misc StrapsWhenDisc Speaker Control Speaker Volume Access frm Remt RemAccssPasswrd Dir 1_Callback Callback Delay SpecialSecurity EntryWait_Time VF_Prompt Type NMS_Call_Msgs NetworkPosition NetMngmtAddress Diag Connection Mixed Trib F W Link Delay sec Singleport Mode V 42 MNP Buffer Security 98 14624 07 Dial Modulation Dial Line Rate Automode Autorate V32bis Override Dial...

Page 114: ... is set to Sync then the modem operates in Async mode when offline For Async Dial Async Leased and UNIX Dial Async is the factory default The AT commands for Async Mode are M0 or Q0 The AT commands for Sync Mode are M1 M2 M3 M5 or Q1 Q2 Q3 Q5 Sync DTE Rate 128000 Nxt 128000 115200 112000 96000 76800 72000 64000 57600 56000 48000 38400 28800 19200 14400 9600 4800 2400 1200 This configuration option...

Page 115: ...nfiguration option is set to DirectMode 6 DirectMde Sets data length to 6 data bits Only valid when Err Contrl Mode configuration option is set to DirectMode NOTE If the DTE Dialer Type configuration option is set to AT or V 25bis Async then the total character size must equal 10 bits Total character size consists of start data parity and stop bits V 25bis Async must use 7 data bits with even pari...

Page 116: ...TR drops on the DTE interface This selection is valid only in the V32bis modulation and can be used on the answer side modem to force the originate modem to initiate a dial backup NOTE If V 25bis mode is used then this configuration option must be set to Stndrd_RS232 The DTE must provide DTR to dial or answer a call NOTE When operating over the dial network this selection forces DTR Action to beha...

Page 117: ...control carrier then the remote modem s LSD Control configuration option must be set to Simulated Control Carrier Simulated Control Carrier conforms to V 13 specifications This setting is ignored when the modem is configured for Asynchronous mode and RTS CTS flow control is selected Control Carrier Allows the DTE s RTS signal to control the modem s carrier signal When RTS is ON carrier is present ...

Page 118: ...ows the state of DTR When DTR turns ON CTS turns ON When DTR turns OFF CTS turns OFF Follows RTS The state of CTS follows the state of RTS When RTS turns ON CTS turns ON When RTS turns OFF CTS turns OFF NOTE When CTS flow control or CTS RTS flow control is enabled CTS will turn ON and OFF regardless of the setting of CTS Control The AT command for Forced On is D0 The AT command for Standard RS232 ...

Page 119: ...ows the state of DTR except when disconnecting once a connection is established In this instance DTR remains ON and LSD turns OFF DTR must then toggle OFF and then ON again for LSD to turn ON This setting is required for Lucent DATAKIT dial out applications NOTE If LSD Control is set to DTR DiscOff then the DTR Action configuration option must be set to Stndrd_RS232 The AT command for Forced On is...

Page 120: ... 15 on the EIA 232 D interface to be clamped OFF when TX Clock Source is configured for External Enable TXC is clamped off when TX Clock Source is configured for External Disable TXC continues to be provided when TX Clock Source is configured for External The AT command is S Register S71 n where n is 0 for Enable and 1 for Disable CT111_Rate Cntl Disable Nxt Disable Fallback1 Fallback2 This config...

Page 121: ...nd Main Ch Disable Nxt Disable Enable Primary data can only be extended one link Extend Main Channel This configuration option supports extended diagnostics Specifies whether there is main primary channel connectivity between the modem s DTE ports and the DTE ports of modems one level below downstream or above upstream in the diagnostic network Enable If this configuration option is set to Enable ...

Page 122: ...ta bits Odd parity and 1 stop bit If the modem is in Asynchronous mode enter the following command string to configure it for V 25bis Bisync dialing AT F D1 S1 M233 W If the modem is already configured for synchronous operation perform the following to set the character format 1 use the modem s front panel to access the Async Sync Mode configuration option and set it to Async 2 scroll down until t...

Page 123: ...S12 n where n is a value from 0 to 255 in 20 millisecond increments BreakForceEscap Disable Nxt Disable Enable This configuration option only appears when DTE Dialer Type is configured for AT Break Forces Escape Determines whether or not the modem should enter Command mode when it receives a break character from the DTE Disable A break character is sent to the remote end Enable Modem escapes into ...

Page 124: ...Enable in Originate mode is Q2 ExtendResltCode Enable Nxt Enable Disable Add EC Add V42 MNP Use_DTE_Rate This configuration option only appears when DTE Dialer Type is configured for AT Extended Result Codes Informational messages such as VF data rate and Error Control appear along with the result codes For a list of Extended Result Codes refer to Table 14 1 in Chapter 14 AT Command Set and S Regi...

Page 125: ...alid commands When an invalid command is encountered the modem ignores it and issues the OK result code If a string with multiple commands is entered then an invalid command within that string will not prevent the execution of subsequent valid commands No Strap or ERROR Ignores all AT commands including valid commands that cause a configuration option to change Only non configuring commands for ex...

Page 126: ...e Following this is a description of the configuration option Factory default settings are listed in Appendix F Default Configuration Options Table 5 9 1 of 4 Line Dialer Configuration Options Singleport Mode A AutoAnswerRing 1 Nxt 1 Disable 2 4 6 8 10 Auto Answer Ring Count Determines the number of rings necessary before the answering modem answers an incoming call For example if this option is s...

Page 127: ...ountries The AT command is S Register S6 n where n is from 2 to 255 in 1 second increments BusyTone Detect Enable Nxt Enable Disable Busy Tone Detect Sets the modem to monitor for Busy Tone Enable or ignore Busy Tone Disable NOTE This configuration option is normally enabled however if the modem receives false busy tones this configuration option can be disabled and the modem ignores all busy tone...

Page 128: ...ems if line current is disrupted for more than 90 milliseconds Use this setting if the modem constantly disconnects when set to Enab 8msec Disable Ignores any disruptions in line current such as call waiting The AT command is S Register S65 n where n is 0 for Enable 8 msec 1 for Enable 90 msec and 2 for Disable Long Space Disc Enable Nxt Enable Disable Long Space Disconnect Determines the modem s ...

Page 129: ... performed a self test is performed or if the modem is switched to the service line NOTE This configuration option should only be used when the modem is located behind a user s Private Branch Exchange PBX The Make Busy Network Interface Module NIM must be installed on the COMSPHERE 3000 Series Carrier Refer to the COMSPHERE 3000 Series Carrier Installation Manual The AT command is S Register S40 n...

Page 130: ... V21 0 300 103J 1200 75 V23 75 1200 V23 600 75 V23 75 600 V23 Dial Line Rate This configuration option determines the modem s data rate and modulation scheme for operation on dial lines Online changes do not take effect until a disconnect occurs NOTE Certain changes to this configuration option will cause the modem to reset 33600 V34 31200 V34 28800 V34 26400 V34 24000 V34 21600 V34 19200 V34 1680...

Page 131: ...rt This autorating only occurs between 19 200 bps and 4800 bps during V 32 V 32bis and V 32terbo connections and 33 6 and 2400 bps for the V 34 family Start at 48 and Start at 96 Only appear for V 32 families Set the maximum connect rate for V 32 V 32bis and V 32terbo connections Fast Autorating is enabled and tuned to minimize bit errors The AT command is S Register S76 n where n is 0 for Enable ...

Page 132: ...applications Long Selects long train Use this setting whenever far end frequency offset phase roll may be encountered This is usually only required when transmitting over satellite links Short Allows the modem to train up faster when using the V 34 and V 32 families modulation The AT command is S Register S43 n where n is 0 for Long and 1 for Short V34 Symbol Rate Automatic Nxt Automatic 3429H 342...

Page 133: ...nabled in both modems Disable The modem operates in symmetric rate mode the transmit and receive rates are identical when running V 34 modulation Either modem can force symmetric mode by disabling the Asymmetric Rate configuration option The AT command is S Register S14 n where n is 0 for Enable and 1 for Disable NOTE This configuration option is typically disabled when the MUX is in use and it is...

Page 134: ...4 19200 V34 16800 V34 14400 V34 12000 V34 9600 V34 7200 V34 4800 V34 2400 V34 The modem operates using V 34 modulation at the data rate selected NOTE Make sure that the Backup Line Check option is disabled before attempting to change from V 32 to V 34 modulation Otherwise the Invalid Strap message appears 19200 V32t 16800 V32t 14400 V32b 12000 V32b 9600 V32b 7200 V32b 4800 V32b The modem operates ...

Page 135: ...mode receiving a call or 2 wire or 4 wire operation in Originate initiating a call mode NOTE For proper operation of V 32 modulations over leased lines one modem must be set to Originate mode and the other set to Answer mode For Sync Leased Answer Mode Async Leased Answer Mode and Trellis Multipoint Tributary Mode 4 wire Answer is the factory default For Sync Leased Originate Mode Async Leased Ori...

Page 136: ... where n is from 0 to 15 corresponding to 0 dBm to 15 dBm Asymmetric Rate Enable Nxt Enable Disable Asymmetric Rate Controls rate symmetry when running V 34 modulation by enabling or disabling the V 34 modulation from using equal transmit and receive rates Enable The modem operates in Asymmetric Rate mode the transmit and receive rates can be different when running V 34 modulation The Asymmetric R...

Page 137: ...uto Dial Back operation varies based on the country Circular The modem dials the number in directory one 1 If the call fails the modem dials the number in the next directory location until it is successful The modem returns to directory one when it encounters an empty directory or the last directory 24 NOTE In point to point applications this configuration option must be set to Enable in both the ...

Page 138: ... third modem is used for the dial backup When the leased line is restored the Special Standby configuration allows the leased line modems to return service to the original point to point modems NOTE When the modems are set for normal dial standby 15min 1hr 4hr or Test 2min the Special Standby configuration option allows the originate modem to test the lease connection in one direction before inter...

Page 139: ...ne Rate is configured for TMp Trellis Multipoint TMp Train Time Defines the length of time energy is sent from the tributary modem to the control modem More severe line conditions require longer time selections The AT command is S Register S95 n where n is 0 for 10 milliseconds 1 for 20 milliseconds 2 for 50 milliseconds 3 for 100 milliseconds 4 for 200 milliseconds and 5 for 300 milliseconds TMp ...

Page 140: ...ual Leased Line configuration option is changed the modem will reset BackupLine Check Disable Nxt Disable Enable This configuration option only appears when the Dual Leased Line device option is enabled and the V 34 is disabled in the LeaseLine Rate configuration option Backup Line Check Tests the backup circuit for availability while the modem is operating on the primary 4 wire leased lines The t...

Page 141: ...s to connect in MNP mode If this fails the modem connects in Buffermode and continues operation This is also known as V42 MNP Autoreliable mode V 42 MNP or Disconnect Modem attempts to connect in V 42 Error Control mode using V 42 LAPM protocol If this fails the modem attempts to connect in MNP mode If this fails the modem disconnects This is also known as Reliable mode MNP or Buffer Modem attempt...

Page 142: ...ode is configured for Async and Error Control Mode is configured for V42 MNPorBfr V42 MNPorDsc MNP_or_Buffr or MNP_or_Disc MNP5 Compression Determines if the modem uses MNP Class 5 data compression It can be set independently of V 42bis data compression Online changes do not take effect until a disconnect occurs The AT command for Disable is C0 The AT command for Enable is C1 EC Negotiat Bfr Disab...

Page 143: ...igured for DirectMode Flow Control of DTE Determines how the modem controls the flow of data from the DTE CTS to DTE Method of flow control in which the modem raises and lowers its CTS interface lead to indicate when the DTE should start and stop sending data Disable The modem cannot control the flow of data from the DTE XON XOFF Method of flow control in which the modem sends XON and XOFF charact...

Page 144: ...Control mode is enabled flow control between the modems will happen automatically regardless of the setting of this option Disable Modem does not respond to XON and XOFF characters received over the VF line Also the modem will not transmit an XOFF character to the remote end if its receive buffers are full Enable Modem stops transmitting data to the remote modem if it receives an XOFF character ov...

Page 145: ...s the Synchronous Data Compression mode HDLC SDLC Enables the Synchronous Data Compression mode NOTE The modem resets when Sync Comp Mode is set to DirectMode The AT command for DirectMode is SC0 The AT command for HDLC SDLC is SC1 SDC Negotiation LAPM_Discon Nxt LAPM_Buffer LAPM_Discon This configuration option only appears when the Async Sync Mode configuration option is set is to Sync and Sync ...

Page 146: ... the Sync Comp Mode configuration option is not set to DirectMode Synchronous DTE CRC Determines whether the CRC of the DTE frame is transmitted from modem to modem Ignore No assumption is made about the CRC type The CRC is transmitted along with the other data in the frame CRC16 The CRC is known to be the 16 bit CRC for HDLC frames defined by the ITU T generator polynomial x16 x12 x5 1 It is remo...

Page 147: ...ect Delay Determines how long the modem continues to transmit data stored in its buffers when the modem is commanded to disconnect by a locally attached DTE This also applies to the modem s receiving buffers when it is commanded to disconnect from a remote modem or DTE Disable Modem disconnects immediately without attempting to send data stored in its buffers 10 60 sec Maximum amount of time the m...

Page 148: ...the use of Pin 21 of the EIA 232 D ITU T V 24 interface by the DTE to initiate a remote loopback An Abort command or test time out ends this test Enable The DTE forces the modem into remote loopback when the signal on Pin 21 CT140 is turned ON Remote Loop ends when the signal is dropped Disable The DTE does not initiate remote loopback in response to the signal on Pin 21 V34Special The DTE forces ...

Page 149: ...addressing should be used for extended data circuits tail circuits Disable This is used for normal point to point leased line and dial networks Address Values 01 03 05 07 09 0B 0D 0F 11 13 15 17 19 1B 1D 1F 25 27 2B 2D 2F 33 35 37 3B 3D 3F 55 57 5B 5F 6F 77 or 7F This configuration option selects the address of a modem that is to be placed into a loopback test This configuration option is used for...

Page 150: ...ing applications where it is desirable to start the modem from a known condition after every call This allows multiple users to issue AT commands to change the modem s operation for their particular call NOTE If Reload is selected the following AT commands are disabled although the OK result code appears when the following commands are issued AT F0 AT F1 AT F2 AT F3 AT F4 AT F5 AT F6 AT F7 AT F8 A...

Page 151: ...56 n S57 x S58 y and S59 z where n is the leftmost pair of digits x is the second pair of digits y is the third pair of digits and z is the rightmost pair or fourth pair of digits For example if the remote access password is 12345678 then the value for S56 is 1 and 2 and the value for S59 is 7 and 8 Dir 1_Callback Disable Nxt Disable Enable Directory Location 1 Callback This configuration option c...

Page 152: ...eceived directory number is valid the answering modem uses it to locate the phone number of the originating modem for callback NOTE This selection only appears when the Dir 1_Callback configuration option is set to Enable The AT command is S Register S25 n where n is 0 for Disable 1 for Remote Access Password and 2 for Callback Directory Number EntryWait_Time 20 sec Nxt 20 sec 10 sec 40 sec 60 sec...

Page 153: ... 0 for Call Connect Progress 1 for Disable 2 for Call Connect Only and 3 for Call Progress Only Modem Selects the Diagnostic Channel NMS Selects the Control Channel Disable Prevents messages being sent from the diagnostic port NetworkPosition Tributary End Tributary Control Network Position Identification Each modem must be identified either as a control modem or a tributary modem NOTE Changes to ...

Page 154: ...elects the Control Channel Disable Prevents messages being sent from the diagnostic port The AT command is S Register S90 n where n is 0 Modem DC and 1 for NMS CC and 2 for Disable Mixed Trib F W No End No Yes This configuration option is only available when the modem is configured for TMp Control Mixed Tributary Firmware Establishes that a multipoint network has TMp tributary modems using firmwar...

Page 155: ...3920 A2 GH30 40 Security Singleport Mode A The Security configuration options allow you to set the parameters that control how a dial access security password is entered For security configuration options refer to Chapter 12 Dial Access Security ...

Page 156: ...to point control modems The Poll List Plist branch of the Top Level menu allows you to identify downstream modems in order to support health and status polling and download broadcasting The maximum number of devices is 32 on the secondary channel and 64 on the diagnostic channel Status Status Configure Control Test SubHS Call_Setup Tlk Data Security Remote PList Tributary only Display Clear Change...

Page 157: ...tAddress configuration option Over a diagnostic channel a tributary modem can communicate with control modems by using the control modem s network management address for polling In the poll list modems are listed as either Active or Skip Downstream modems in the Active poll list are polled by the modem Modems in the Skip poll list are passed over during the polling process but not deleted from the...

Page 158: ...key Clear The Clear function does not appear in Remote mode Clear deletes the modem s poll list To access Clear from the PList branch make the following selection F1 Poll List Display Clear F2 F3 Select Clear The message Command Complete appears on the second line of the LCD to indicate that the poll list has been cleared To exit this function and remain in the PList branch press the key To exit a...

Page 159: ... address field xxx use the and keys to position the cursor _ under the digit to be incremented Press the F2 key to increment the digit Press Enter Ent to implement the function yyyyyy you selected Active Delete or Skip The message Command Complete appears on the second line of the LCD to indicate that the poll list change occurred If the message Poll List Check appears you attempted to delete an a...

Page 160: ...t Add Command Complete F2 F3 The message Command Complete appears on the LCD to indicate that the tributary modem will be added to the control modem s poll list To exit this function and remain in the PList branch press the key To exit and return to the Top Level menu press the key Acquire The Acquire function does not appear in Remote mode Acquire allows you to acquire an active poll list consist...

Page 161: ...dress field xxx is incremented sequentially from 001 to 256 as polls are transmitted from the modem to the downstream modem s To be added to the modem s poll list the device must respond to a poll after receiving its address The Acquire function can be canceled by selecting Abort The number field yyy indicates the total number of devices that responded to the modem s polls thus far These devices h...

Page 162: ...point Configurations 7 11 Implementing a Clone Remote Operation 7 14 Automatic Firmware Download 7 16 Automatic Firmware Download Failure 7 16 VF Thresholds Update 7 17 Control Branch The Control branch of the Top Level menu allows you to manage hardware and software functions such as speaker volume reset busy out and firmware download Control Status Status Configure PList Test SubHS Call_Setup Tl...

Page 163: ...r to the Misc section in Chapter 5 Configure Branch To access Speaker from the Control branch make the following selection F1 Control Speaker Reset F2 F3 Select Speaker F1 Speaker Control Off Low Med F2 F3 Press the key and appropriate function keys to choose the desired selection DCP selections are Off Turns the speaker off Low Adjusts the speaker to low volume Med Adjusts the speaker to medium v...

Page 164: ...disable the modem s data transmitter function on a specific port or on all ports The Data Stream function is not available in Singleport mode with configuration option Async Sync Mode set to Async or when Synchronous Data Compression is enabled To access Data Stream from the Control branch make the following selections F1 Control Data_Stream F2 F3 Press the key until Data Stream appears Select Dat...

Page 165: ...y selecting this action To change the modem s data stream press the F2 key When the message Command Complete appears press the key to clear the message F1 Data Stream Port1 Enable F2 F3 To change the data stream for the selected port again press the F2 key or To exit this function and remain in the Control branch press the key To exit and return to the Top Level menu press the key Selecting All Po...

Page 166: ...tal interface Use the EIA LEDs function to change the port that controls the front panel LED Based on the modem s configuration the following conditions exist The CC or DC selection is not available if the Diagnostic Connector configuration option is disabled Refer to the Diag Connection configuration option in the Misc section of Chapter 5 Configure Branch The CC or DC interface is not available ...

Page 167: ... appears in the xxxxx field To exit this function and remain in the Control branch press the key To exit and return to the Top Level menu press the key NOTE The Port 1 interface is the only display allowed on the 3921Plus modem in Singleport mode therefore the entire EIA LEDs branch is masked Make Busy Remove Make Busy The Make Busy function forces the modem off hook so it cannot answer a call Thi...

Page 168: ...ialing methods as described in Chapter 10 Call Setup Branch A service line is an extra dial line connected to a COMSPHERE 3000 Series Carrier This line is normally shared by up to four Model 3921Plus multiport or eight singleport modems installed in either Slots 1 8 or Slots 9 16 However by daisy chaining the service line connector of one Network Interface Module NIM to the service line of another...

Page 169: ... are two selections under Download Software Clone Remote and To Local via DTE Clone Remote is used to transfer an exact copy of the firmware currently stored in a 392xPlus modem to either one or more remote 392xPlus modems or one or more DC attached 392xPlus modems When implementing a Clone Remote operation the following is true The Clone Remote function only operates properly if the remote modems...

Page 170: ...emote in Multipoint Configuration Clone Remote in Point to Point Configurations Before using Clone Remote in point to point configurations verify the following The 392xPlus modems have an established leased line connection using either V 34 family V 33 V 32 family or V 29 modulation refer to the Leased Line section in Chapter 5 Configure Branch or a dial network connection using either V 34 family...

Page 171: ...plementing a Clone Remote Operation which follows the descriptions of multipoint cloning operations Cloning DC Broadcast Remote Before using Clone Remote in DC Broadcast configurations make sure the tributary modem s active poll list contains all the network management addresses for the control modems that receive the download refer to Chapter 6 Poll List Branch and ensure that the control modems ...

Page 172: ...ms Multiple NOTE A Trellis Multipoint TMp tributary modem cannot download firmware to its control modem To download firmware to a TMp control modem use a point to point dial connection an NMS or a PC controller Before using Clone Remote in multipoint configurations Single or Multiple perform the following Make sure the 392xPlus modems have an established leased line connection using the Trellis Mu...

Page 173: ... Ent xxx F2 F3 The address field xxx displays the network management address of the modem that receives the download The valid address field range is from 001 to 256 To increment digits within the address field xxx use the and keys to position the cursor _ under the digit to be incremented Press the F2 key to increment the digit Press F1 Ent to select the modem that will receive the download F1 Ch...

Page 174: ...e MPtCloneResults F2 F3 From the Choose DLL Type screen press the key until the MPtCloneResults screen appears to view the results of the last multiple TMp clone operation If the message Trib List Empty appears this indicates that a multiple download was never initiated F1 MPtCloneResults Nxt xxx Pass F2 F3 The address field xxx displays the network management address of one of the remote modems P...

Page 175: ...the Clone Remote process is interrupted disable the mux on the source modem before you initiate another Clone Remote process Be sure to reenable the mux when cloning is complete F1 Warning Download Abort_Download F2 F3 At this point if you do not want to continue this process abort the transfer by selecting any function key This returns the modem to the DwnLoadSoftware menu However to continue wit...

Page 176: ...vice representative No Circuit There is no connection between the local and remote modem After successful establishment of a Remote Cloning Download session the following screens appear F1 RemClone Status Initializing F2 F3 F1 RemClone Status Bank1 xxxx yyyy F2 F3 As the firmware transfers the local and remote LCD s bottom line displays the status of the download process plus the number of records...

Page 177: ... show the amount of time the download will take However a DTE is not required The firmware download begins without any operator action When the firmware download begins the LCD displays download status messages with the data bank number current block being loaded and the total number of blocks F1 Download Status Bank1 xxxx yyyy F2 F3 If the modem connects at 14 400 bps the download takes about 10 ...

Page 178: ...g example the RSL High threshold is changed from 09 dBm to 10 This example demonstrates VF threshold editing and saving With the exception of Signal Quality all VF thresholds may be modified in this manner Signal Quality uses a menu selection with possible values of Excelent Excellent Good Fair Poor or No Signal Editing and saving a VF threshold is similar to editing and saving a configuration opt...

Page 179: ...Refer to Table 7 1 for valid VF threshold ranges r F1 RSL High dBm Nxt 19 F2 F3 r Press the key to move the cursor to the next position 9 Select the F2 key to change the number above the cursor 9 to 0 F1 RSL High dBm Nxt 10 F2 F3 NOTE If you want to modify additional VF thresholds select Nxt To save the edited threshold s F1 RSL High dBm Nxt 10 F2 F3 Press the key to scroll up to the Edit Save scr...

Page 180: ... the key to return to the VF Threshold Edit Save Reset screen F1 VF Thresholds Edit Save Reset F2 F3 Select Reset to restore the original default values into memory Repeat the Edit and Save procedure until the VF threshold s is valid and the Save completes successfully Save Completed To exit this function and remain in the Control branch press the key To exit and return to the Top Level menu press...

Page 181: ...istortion 15 dB to 50 dB Below 30 dB Retrains per 15 minutes 1 to 255 trains 15 trains Signal Quality Excellent lowest Good Fair Poor No Signal highest Good Near Echo 0āć38 dBm Above 20 dBm Far Echo 0 38 dBm Above 20 dBm Frequency Offset 1 Hz to 15 Hz Above 4 Hz Phase Jitter 1 degree to 45 degrees Above 9 degrees Phase Hits 1 to 255 hits 20 hits per 15 minutes Impulse Hits 1 to 255 hits 20 hits pe...

Page 182: ... Analog Loopback Rem Digital Loop Remote Digital Loopback Loc Digital Loop Local Digital Loopback and Pattern The only tests that can operate concurrently on a single modem are Pattern with a Local Analog Loopback and Pattern with a Remote Digital Loopback If any test is operating besides the two combinations just mentioned it must be canceled before starting another test The Test branch only init...

Page 183: ...s Select Test Abort Abort ends any test that is in progress and brings the modem back to the normal mode of operation Confirmation is provided by the Command Complete message To access Abort from the Test branch make the following selection F1 Test Abort Self F2 F3 Select Abort F1 Test Abort Command Complete F2 F3 The modem stops all tests currently in progress and displays the Command Complete st...

Page 184: ...dicators light NOTE The test delays 15 to 30 seconds to allow any outstanding network management messages to propagate before the VF channel is interrupted by the test If the modem passes the self test Pass appears on the LCD If it fails Failed appears If the modem fails contact your service representative If Invalid Command appears the modem is operating on dial lines or on a leased line without ...

Page 185: ...orm this test otherwise Invalid Command appears NOTE If you are performing a Local Analog Loop test on a TMp modulation that is running a test pattern with a constant flow of data you must toggle the RTS switch off and then on to allow the modem to train up Figure 8 1 Local Analog Loopback To access Loc Analog Loop from the Test branch make the following selections F1 Test Loc_Analog_Loop F2 F3 Pr...

Page 186: ... section in Chapter 5 Configure Branch A Ring Indicate during this test can cause errors To exit this function and remain in the Test branch press the key To exit and return to the Top Level menu press the key Rem Digital Loop This test is not available when Using TMp modulation Using Remote mode V 54 configuration option is enabled Using V 34 modulation with the Asymmetric Rate configuration opti...

Page 187: ...ppears on the LCD another test is in progress Select Abort to clear the current test and try again If the Test Timeout configuration option is enabled Test Timeout appears at the conclusion of the test If it is disabled the test operates until aborted For more information on the Test Timeout configuration option refer to the Test section in Chapter 5 Configure Branch To exit this function and rema...

Page 188: ...t to operate properly the modems must be operating at the same rate and in Synchronous or Asynchronous Direct mode NOTE A TMp tributary cannot perform a local digital loopback test Figure 8 3 Local Digital Loopback To access Loc_Digital_Loop from the Test branch make the following selections F1 Test Loc_Digital_Loop F2 F3 Press the key until Loc_Digital_Loop appears Press any function key to start...

Page 189: ...ormation on the Test Timeout configuration option refer to the Test section in Chapter 5 Configure Branch To exit this function and remain in the Test branch press the key To exit and return to the Top Level menu press the key Pattern Pattern can transmit and receive a 511 bit error rate test pattern It can also be used with a currently running local analog loopback or a remote digital loopback to...

Page 190: ...n Test and Digital Loopback Test Figure 8 6 End to End Pattern Test To access Pattern from the Test branch make the following selections F1 Test Pattern F2 F3 Press the key until Pattern appears Select Pattern to start this test F1 Pick Test Port Port1 Port2 F2 F3 ...

Page 191: ...et both block counters In Singleport mode the message NoSync can appear as a value for BlksErrd while the modem s receiver is synchronizing The message OvrFlw can appear as the value for BlksErrd if the counter overflows Press the key to display BlksRcvd xxxxxxx number of blocks of data received Press the key to display Clear Select Clear to reset the block counters The Pattern test can be exited ...

Page 192: ...not available on multipoint tributary modems or with certain modulations V 29 V 33 V 22bis and V 27bis The SubHS branch of the Top Level menu allows you to display alarm conditions in downstream modems Status SubHS Status Configure Plist Control Test Call_Setup Tlk Data Security Remote To access the SubHS branch from the Top Level menu make the following selections F1 Leased 33 6 Test SubHS F2 F3 ...

Page 193: ... updated every several seconds to display the latest status MAJOR MINOR and STATUS display Health and Status alarm conditions refer to Table 4 1 in the Device Health and Status DeviceHS section of Chapter 4 Status Branch for additional information UNKNWN appears when the modem does not recognize the downstream health and status information or device communication is not established Normal appears ...

Page 194: ...connect and answer telephone calls For leased backup applications the Call Setup branch allows you to switch between the primary leased line and the backup leased line In leased backup operation a 2 wire leased line is used as the backup facility instead of the normal 2 wire dial line Plug the leased line into the jack labeled DIAL on the rear panel of the modem see Figure 2 2 in Chapter 2 Modem I...

Page 195: ... applications Dial allows you to dial any telephone number stored in directory locations 1 24 Any telephone number dialed using the DCP must already exist in a directory location Refer to Change Directory for information on storing telephone numbers in directory locations For leased backup applications Dial allows you to switch to the backup leased line Any valid non empty directory location may b...

Page 196: ...he F2 or F3 key to dial the number F1 DialDirectory 01 Off Hook F2 F3 The Call Setup status Off Hook appears during the connection process If the connection is successful the modem is online and one of the Normal Operation status messages Table 3 3 appears on the LCD If the connection is not successful the LCD displays one of the Call Failure status messages Table 3 3 To exit this function and rem...

Page 197: ...sed line and the backup leased line To access Disconnect from the Call Setup branch make the following selection F1 Call Setup Dial Disconnect F2 F3 Select Disconnect F1 Disconnect Command Complete F2 F3 For dial backup applications the modem goes on hook hangs up and the call is disconnected The Command Complete status message appears To exit this function and remain in the Call Setup branch pres...

Page 198: ...goes off hook and attempts to establish a connection in Answer mode The Command Complete status message appears on the LCD To exit this function and remain in the Call Setup branch press the key To exit and return to the Top Level menu press the key Dial Standby Return to Dial When the modem is operating in Dial Backup mode DialBckUp Dial Standby and Return to Dial allow the modem to switch betwee...

Page 199: ...2 F3 If the primary leased line is unacceptable select Return_to_Dial which switches the modem back to backup network operation LCD displays Dial Standby If however the primary leased line is operating properly you can select Disconnect from the Call Setup branch to drop the dial backup connection Also if the primary leased line operation is maintained uninterrupted amount of time specified in the...

Page 200: ...dem has nonvolatile memory locations that allow you to store up to 24 telephone numbers Each directory location can accept up to 40 characters this includes the telephone number and dial command modifiers Any telephone number dialed using the DCP Dial command must appear in a directory location NOTE If the modem is operating on leased lines and has a dial line attached for dial backup purposes it ...

Page 201: ... appears in the first character position Select F2 or F3 until the desired character is selected This can be an alpha or numeric character F1 02 z Nxt F2 F3 Press the key to move the cursor to the next character position Continue this key sequence until the dial command modifiers and telephone number are entered Refer to Table 10 1 for a list of valid dial command modifiers F1 01 9W5556789z Nxt F2...

Page 202: ...ond dial tone before processing the dial string This can be the initial dial tone or can be used when dialing through a tandem PBX R Reverse Dial mode Causes the originating modem to send out an answertone once it no longer detects ringback Ringback is the ring you hear at the originating site when making a call The R modifier must be the last character in the dial string Quiet answer Wait for fiv...

Page 203: ...The directory location is empty Allowed The number in this directory location may be dialed at this time Delayed The number in this directory location may be dialed later Forbidden The number in this directory location may not be dialed Delayed and Forbidden only appear in countries with specific dialing requirements When a number is delayed press the key to display the value of the delay in minut...

Page 204: ...attached telephone To add an external telephone to your modem use an external Y cable to connect the phone line to both the modem and the telephone refer to Appendix C Pin Assignments This cable is not supplied with your modem On initial power up the modem is in Data mode When in Data mode the modem is connected and data can be transmitted or received When in Talk mode the modem is disconnected an...

Page 205: ...a call using a telephone and the remote modem is configured for Auto Answer perform the following procedure F1 Idle 33 6 Tlk Data F2 F3 Press the key until Tlk Data appears Lift the attached handset and dial the telephone number of the remote modem When the remote modem answers it transmits an answer tone F1 Idle 33 6 Tlk Data F2 F3 When you hear this tone immediately select Tlk Data and hang up t...

Page 206: ... place the modems into Data mode You must both select Tlk Data at approximately the same time and hang up the handset to begin the handshaking sequence If the handshake is successful the modems are in Data mode and OnLine appears on the LCD NOTE If the remote modem is not a 3900 Series modem then the remote user must consult that modem s operator s manual to perform a similar operation Once the mo...

Page 207: ...COMSPHERE 392xPlus Modems 11 4 October 1998 3920 A2 GH30 40 ...

Page 208: ...upporting and can be removed to prevent unwanted knowledge of dial access security operation Although the security functions described in this chapter are designed to prevent unwanted user access to your network the company recognizes that no security system is infallible In Singleport mode Dial Access Security is a feature that allows you to control who has access to your COMSPHERE 392xPlus modem...

Page 209: ...following example illustrates the format for an Originate Access password ATD abc123 T9 8005551234 Where ATD is the AT dial command string Percent is the start and stop AT command string interrupt character The password must be embedded in these characters abc123 is the 6 alphanumeric character originate password T is the Tone DTMF dial modifier Comma is the pause dial modifier 98005551234 is the ...

Page 210: ...d via the diagnostic control panel DCP This is the preferred method for synchronous applications And finally an attached telephone can be used to manually generate DTMF tones for the phone number and password After the answering modem accepts the password and generates an answerback tone the originating caller places the modem in Data mode and hangs up the phone The following examples illustrate t...

Page 211: ...from 1 to 6 characters in length The answering modem verifies the password against its password database table and if valid completes the data connection thus allowing DTE data to be passed As with VF side password entry the answering modem must be a 392xPlus modem and the originating modem can be either a 392xPlus modem or any vendor s modem The following example illustrates the format of DTE sid...

Page 212: ...s LCD The two major functions that appear under the Security branch are Set Access Control and Reset Security Security Status Status Configure PList Control Test SubHS Call_Setup Tlk Data Remote Set_Access_Ctrl Reset_Security Admin Password EditPassWdTable Set_Answer_Sec Set_Orig_Secur Set_Admin_PsWd Set Access Control allows you to change security configuration This function is protected by an Ad...

Page 213: ...d every time you access the Security branch This feature ships from the factory with the Administrative Password set to 00000000 Once the correct Administrative Password is entered the Edit Password Table Set Answer Security Set Originate Security and Set Administrative Password groups can be displayed on the LCD To enter your Administrative Password from Set_Access_Ctrl make the following selecti...

Page 214: ...cord A password s record is retrieved by entering its index The Edit Password Table group allows you to view and or change the modem s security database table To do this you must retrieve a password s records by selecting its index Refer to the Select Index section of this chapter The Edit Password Table group consists of the following options Select Index Password Type Edit Password and Save Edit...

Page 215: ...ssword Type Edit Password and Save Edit appear in a series of LCD displays Keep the following in mind when scrolling down Edit Password Table The current function and index appear on the LCD s top line The LCD s bottom line displays Nxt and all selections available for the displayed security option Nxt indicates that more options are available by scrolling down It also indicates that the value dis...

Page 216: ...e set to VF_ _DTE NOTE If the Set Answer Security option Answer Security mode is set to VF_ _DTE special requirements apply in order to use passwords with their type set to DTE_Entry The originating caller must first enter a valid VF password If the VF password entered is configured in the security database with the type VF_plus_DTE the user is then required to enter a password configured in the d...

Page 217: ...urity function No Answer Security Disables the dial access security feature DTE Only The answering modem is enabled for security The originating user must supply a password when prompted NOTE A call attempt never enters data mode if the answering modem is configured for DTE_Only and the originating caller attempts to enter a password using only the VF side password entry technique NOTE In modem po...

Page 218: ...group option Table 12 3 Set Originate Security Group Options Set Orig Sec No_OrigSec EnaOrigSec Set Originate Security Controls the security protection for origination of calls when AT commands are used NOTE The originate password must be included in all AT dial command strings if this option is enabled If not included or incorrectly entered the message ERROR is returned to the DTE No Originate Se...

Page 219: ...ecting Reset Security This restores the password to a known value but erases the contents of the modem s security database To change the Administrative Password make the following selections F1 Set Access Ctrl Set_Admin_PsWd F2 F3 Press until Set_Admin_PsWd appears Select Set_Admin_PsWd F1 Set Admin PsWd Ent 00000000 F2 F3 The Administrative Password appears Press the F2 key to increment password ...

Page 220: ...strative Password to default to the Reset Default password and erases the contents of the database table To reset security make the following selections F1 Security Reset_Security F2 F3 From the Security branch press until Reset_Security appears Select Reset_Security F1 Reset Security Abort_Sec_Reset F2 F3 To abort this function select Abort_Sec_Reset Nothing is erased and the LCD returns to the m...

Page 221: ...assword VF_Prompt_Type 2nd_DialTone Nxt 2nd_DialTone Quiet_Answer This configuration option only appears if Answer Security Mode is configured for VF_ _DTE VF Prompt Type Determines how the answering modem requests a valid password from the originating modem for the valid password This configuration option is only used for VF side password entry and is not valid for DTE side password entry 2nd Dia...

Page 222: ... if applicable are complete NMS_Reporting 00 Nxt 00 This configuration option does not appear if Answer Security Mode is configured for No_Answ_Sec NMS Reporting Only applicable when using network management Determines how and if security event information is reported to the 6700 Series NMS This information can be collected to build an audit trail of successful and unsuccessful connections Values ...

Page 223: ...ed how to set up and configure your network for dial access security Once configured and enabled you must now supply a password to originate or answer a call The following examples demonstrate how to enter an Answer Access security password string and an Originate Access password string Answer Access Password VF Side and DTE Side Entry Techniques Answer Access password security uses two password e...

Page 224: ...ve DTE side passwords can be from 1 to 6 characters in length If a valid password is entered then the modems connect and data can pass Originate Access Password An Originate Access password is entered by a local user to gain access to a local 392xPlus modem This password is embedded in the AT dial command and cannot be entered from the diagnostic control panel DCP The following example describes h...

Page 225: ...in the AT command dial string Table 12 5 Security Database Table Using VF Side Passwords VF Password Only Index Password Type Assigned to 21 1 VF_Entry Denver office 31 12 VF_Entry Chicago office 41 1212 VF_Entry Dallas office 51 953246 VF_Entry Miami office modem 1 52 46958373 VF_Entry Miami office modem 2 61 32562682 VF_Entry Atlanta office Table 12 6 is an example of a database table with passw...

Page 226: ... VF_plus_DTE Miami office modem 2 161 32562682 VF_Entry Atlanta office 1131 winter DTE_Entry User C Chicago office 1141 summer DTE_Entry User A Dallas office 1142 spring DTE_Entry User B Dallas office 1151 fall DTE_Entry User D Miami office 1152 z DTE_Entry User E Miami office 1153 3g8sX4 DTE_Entry User F Miami office Users in the Denver and Atlanta offices are connected to the DTE after entering ...

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Page 228: ...owing provides instructions to clear the dial access security alarm light from the modem s front panel Press the key to return to the Top Level menu Press F1 to access the Status branch Press F1 again to access the DevHs branch Press F3 to access the Security branch From the Security branch press F1 twenty 20 times The security alarm light clears ...

Page 229: ...COMSPHERE 392xPlus Modems 12 22 October 1998 3920 A2 GH30 40 ...

Page 230: ...mote modem Any changes made to configuration options while using the Remote branch are not saved until you exit the Remote branch This function is only available when using either V 34 V 33 V 32terbo V 32bis V 32 TMp or V 29 modulation schemes Remote Status Status Configure Plist Control Test SubHS Call_Setup Tlk Data Security Choose Address TMp Control only Choose Password TMp only Not in TMp Tri...

Page 231: ...o the higher data rate but it also interrupts data flow because primary data is stopped when Remote mode is active Once Remote mode is terminated the primary channel is automatically made available for data transmission Unlike primary channel communications the secondary channel operates at a slower data rate and does not interrupt data flow V 34 V 32terbo V 32bis V 32 and TMp are the only modulat...

Page 232: ...trol or tributary you must specify the remote access password of the modem that will be accessed by the Remote function The following display does not appear in point to point modems F1 Choose Password Ent yyyyyyyy F2 F3 The password field yyyyyyyy displays the remote access password of the modem to be accessed by the Remote function To increment digits within the password field yyyyyyyy use the a...

Page 233: ...r the Test branch when using the secondary channel When using the primary channel the Test branch does not appear Poll List Display is the only function available under the PList branch Exit Remote replaces Remote on the local modem s LCD To return to local modem operation select ExitRem Any changes made to configuration options in the remote modem are saved The following conditions can cause Remo...

Page 234: ...connection with a remote modem it is considered to be in Command mode an idle state where you can modify its operating parameters or issue modem commands Any command issued is acknowledged with a response in either words or digits known as Result Codes Refer to Table 14 1 for a listing of result codes Once the modems are online either by answering or originating a call they automatically switch to...

Page 235: ... bits no parity 1 stop bit 7 data bits no parity 2 stop bits 7 data bits parity 1 stop bit parity can be odd even mark or space All commands except A and must begin with the characters AT and end by pressing the Enter key The AT or at prefix clears the command buffer and matches the modem speed and parity to that of the DTE Commands can be upper or lowercase but the modem will not recognize mixed ...

Page 236: ...quiet answer 10 10 CONNECT 2400 Connection at 2400 bps 11 11 CONNECT 4800 Connection at 4800 bps 12 12 CONNECT 9600 Connection at 9600 bps 13 16 CONNECT 12000 Connection at 12 000 bps 14 13 CONNECT 14400 Connection at 14 400 bps 15 14 CONNECT 19200 Connection at 19 200 bps 16 15 CONNECT 7200 Connection at 7200 bps 17 17 CONNECT 16800 Connection at 16 800 bps 19 19 CONNECT 300 Connection at 300 bps...

Page 237: ... CONNECT 76800 EC Connection at 76 800 bps 34 34 CONNECT 115200 Connection at 115 200 bps 35 35 CONNECT 115200 EC Connection at 115 200 bps 37 37 CONNECT 21600 Connection at 21 600 bps 38 38 CONNECT 24000 Connection at 24 000 bps 39 39 CONNECT 26400 Connection at 26 400 bps 40 40 CONNECT 28800 Connection at 28 800 bps 41 41 CONNECT 31200 Connection at 31 200 bps Only appears when the Extended Resu...

Page 238: ...t Rate TX appear in place of the single rate Only appears in countries with specific dialing requirements AT Command List AT commands are issued from an asynchronous DTE such as a PC and control the modem s operation and software configuration AT commands are only applicable when the DTE Dialer Type configuration option is set for AT Refer to the Mn and Qn commands Table 14 2 lists all AT commands...

Page 239: ...ength of this pause is determined by the setting of the Pause Time configuration option refer to the Line Dialer configuration option group or by value held in S Register S8 W Wait for dial tone The modem waits for a second dial tone before processing the dial string This can be the initial dial tone or can be used when dialing through a tandem PBX For example 9W 555 6789 R Reverse Dial mode Cause...

Page 240: ...f M0 Speaker always OFF M1 Speaker ON until carrier signal is detected M2 Speaker always ON Control Speaker Configure Edit Misc O Return to Online or Data Mode Returns modem to Data mode from Online Command mode None P Pulse Dial Sets the modem for Pulse Dial mode NOTE Pulse Mode is disabled in Denmark and Sweden Configure Edit Line Dialer Qn Result Codes Q0 Enables modem to send result codes to t...

Page 241: ... displays OK CONNECT RING NO CARRIER ERROR Add EC Displays result codes with EC suffix Add V42 MNP Displays result codes with V 42 or MNP suffix Use DTE Rate Displays DTE data rate instead of line rate Dial Tone Detect Enable Sets the modem for dial tone detect Disable Sets the modem for blind dialing NOTE It may not be possible to disable Dial Tone Detect in some countries Busy Tone Detect Enable...

Page 242: ...TR Action D0 Ignore Modem ignores the true status of DTR and treats it as always ON D1 D2 D3 Standard RS232 DTR Signal is controlled by the DTE D4 Controls On Hook Modem does not disconnect from the VF line until DTR turns OFF D5 Controls Transmitter Mute Mutes the transmitter whenever DTR drops on the DTE interface This can be used on the answer side modem to force the originate modem to initiate...

Page 243: ... Configure Edit Dial Line NOTE In North America the range of allowable values is 10 dBm to 32 dBm This command is disabled in some countries it answers OK but does not change the level Ln Leased Mode L0 Disables leased line operation L1 2 wire originate leased line operation L2 4 wire originate leased line operation L3 2 wire answer leased line operation L4 4 wire answer leased line operation The ...

Page 244: ...n Asynchronous mode using no AT Command protocol M232 Modem operates in Asynchronous mode using V 25bis asynchronous AT Command protocol M233 Modem operates in Synchronous mode using V 25bis bisynchronous AT Command protocol M234 Modem operates in Synchronous mode using V 25bis HDLC AT Command protocol M235 Modem operates in Asynchronous mode using AT T Emulation AT Command protocol M236 Modem ope...

Page 245: ...e Active Operating Active Saved Customer 1 and Customer 2 configuration areas as well as the telephone numbers stores in directory locations 1 24 V0 Active Operating configuration options V1 Active Saved configuration options V2 Customer 1 configuration options V3 Customer 2 configuration options V4 Directory locations 1 24 None Wn Write Save to Memory Saves the current configuration options in Ac...

Page 246: ...Disable C1 Enable C2 Disables and switches modem to Buffer mode Configure Edit V42 MNP Buffer Dn CTS Control D0 Forced On Forces CTS to always ON D1 Standard RS232 D2 Wink When Disconnect CTS is turned OFF for 1 to 2 seconds upon a disconnect D3 Follows DTR The state of CTS follows the state of DTR D4 Follows RTS The state of CTS follows the state of RTS Configure Edit DTE Interface Gn Modem to Mo...

Page 247: ...re n is a value from 1 to 255 in 1 minute increments Configure Edit Line Dialer NOTE The factory default value is country dependent Xn XON XOFF Passthrough Flow Control X0 Disable X1 Enable Configure Edit V42 MNP Buffer An Error Control Fallback Character An Where n is an ASCII value from 0 to 127 Factory default is 013 ASCII Configure Edit V42 MNP Buffer Cn MNP5 Data Compression C0 Disable C1 Ena...

Page 248: ...e Description Qn Synchronous Flow Control of DTE Q0 No flow control Q1 Flow control using transmit clock circuit 114 Q2 Flow control using CTS circuit 106 Configure Edit V42 MNP Buffer SCn Synchronous Data Compression Mode SC0 Disable Synchronous Data Compression mode SC1 Enable Synchronous Data Compression mode Configure Edit V42 MNP Buffer ...

Page 249: ...her description is necessary NOTE In some countries the range of allowable values of some S Registers are restricted If the DTE attempts to enter an illegal value the modem will answer OK but it will set the register to the closest legal value The DTE can check the actual value of the register with Sn command S Register Format S Registers can be displayed and or modified when the modem is in Comma...

Page 250: ...er a value from 0 127 for the line feed character The factory setting is 10 ASCII carriage return or line feed Configure Edit DTE Dialer S5 Backspace Character Register determines ASCII value used as the backspace Backspace key This character moves the cursor to the left and erases the previous character Enter a value from 0 127 The factory setting is 8 backspace key Configure Edit DTE Dialer S6 B...

Page 251: ...ctory setting is Enable Configure Edit Leased Line S18 Test Timeout Register sets the duration in seconds for the modem tests This automatically cancels any test in progress after the time of this register expires Any test can be manually canceled by issuing the escape sequence followed by the T0 command Enter a value from 0 255 seconds A value of 0 disables this register The factory setting is Di...

Page 252: ...s 8 16 8 Kbps 9 14 4 Kbps 10 12 0 Kbps 11 9 6 Kbps 12 7 2 Kbps 13 4 8 Kbps 14 2 4 Kbps The factory setting is Disable Configure Edit Leased_Line S25 Special Security Register selects type of special security to be used Register has the following values 0 Disable 1 Remote Access Password 2 Callback Directory Number The factory setting is Disable Configure Edit Misc S26 RTS to CTS Delay Register set...

Page 253: ...pression or synchronous buffer mode and when the applicable configuration option TX Clk Source or Bakup_TXClk_Src is set to Internal Register has the following values 0 115 200 1 76 800 2 57 600 3 38 400 4 28 800 5 19 200 6 14 400 7 9 600 8 4 800 9 2 400 10 1 200 11 128 000 12 112 000 13 96 000 14 72 000 15 64 000 16 56 000 17 48 000 The factory setting is 128 000 Configure Edit DTE Interface S31 ...

Page 254: ...ding Synchronous Data Compression bit encoding Register has the following values 0 NRZ 1 NRZI The factory setting is NRZ Configure Edit V42 MNP Buffer S38 Trellis Multipoint TMp Tx Preemphasis Value Controls amplification for frequencies above the carrier frequency to compensate for high frequency line attenuation The higher the value the greater the amplification Enter a value from 0 F hex The fa...

Page 255: ...00 V 22 8 1200 212A 10 0 300 V 21 11 0 300 103J 12 1200 75 V 23 13 75 1200 V 23 18 600 75 V 23 19 75 600 V 23 20 19 200 V 32terbo 21 16 800 V 32terbo 22 33 600 V 34 23 31 200 V 34 24 28 800 V 34 25 26 400 V 34 26 24 000 V 34 27 21 600 V 34 28 19 200 V 34 29 16 800 V 34 30 14 400 V 34 31 12 000 V 34 32 9600 V 34 33 7200 V 34 34 4800 V 34 35 2400 V 34 The factory setting is 33 600 V 34 Configure Edi...

Page 256: ...00 V 27bis 17 2400 V 27bis 18 19 200 V 32terbo 19 16 800 V 32terbo 20 19 200 TMp 21 14 400 TMp 22 9600 TMp 23 7200 TMp 24 4800 TMp 25 2400 TMp 26 33 600 V 34 27 31 200 V 34 28 28 800 V 34 29 26 400 V 34 30 24 000 V 34 31 21 600 V 34 32 19 200 V 34 33 16 800 V 34 34 14 400 V 34 35 12 000 V 34 36 9600 V 34 37 7200 V 34 38 4800 V 34 39 2400 V 34 The factory setting is 33 600 V 34 Configure Edit Lease...

Page 257: ...n Level Register determines if the modem disconnects if the carrier signal on leased lines falls below 26 dBm or 43 dBm Register has the following values 0 43 dBm 1 26 dBm 2 33 dBm The factory setting is country dependent usually 43 dBm In France the factory setting is 26 dBm in 4 wire operation and 33 dBm in 2 wire operation Configure Edit Leased Line S49 Buffer Disconnect Delay Register determin...

Page 258: ...ister has the following values 0 Enable 1 Disable The factory setting is Enable Configure Edit Misc S56 Remote Access Password Register allows entry of the first pair leftmost of digits of a remote access password Any value from 00 to 99 is valid For example if the remote access password is 12345678 then S56 1 and 2 Configure Edit Misc S57 Remote Access Password Register allows entry of the second...

Page 259: ...coding used by the DTE while in V 25bis mode Register has the following values 0 ASCII 1 EBCDIC The factory setting is ASCII Configure Edit DTE Dialer S63 V 25bis Idle Fill Register identifies to the modem the type of idle fill used by the DTE while in V 25bis mode Register has the following values 0 Mark 1 Flag The factory setting is Mark Configure Edit DTE Dialer S64 V 25bis New Line Character R...

Page 260: ... factory setting is Disable Configure Edit Misc S69 Make Busy Via DTR Register determines if the modem goes off hook busy when DTR is OFF Register has the following values 0 Disable 1 Enable The factory setting is Disable Configure Edit Line Dialer S70 V 27bis Train Register controls the train time for V 27bis operation Register has the following values 0 Short 1 Long The factory setting is Short ...

Page 261: ... the following values 0 Enable 1 Disable 2 Start 48 3 Start 96 4 Fast The factory setting is Enable Configure Edit Dial Line S78 V 32bis Automode Dial Line Register allows the modem when operating on dial lines to automatically detect and connect to the remote modem s modulation scheme Register has the following values 0 Enable 1 Disable The factory setting is Enable Configure Edit Dial Line S81 2...

Page 262: ...are reloaded to Active Operating when a disconnect occurs Register has the following values 0 or 231 No Change 1 or 232 Reload The factory setting is No Change Configure Edit Misc S89 V 42 Automatic Request for Retransmission ARQ Window Size Increase Register allows the ARQ window size to be set to a value from six frames to fifteen frames For best performance this register should remain at its de...

Page 263: ... recommended for a control modem as well Register has the following values 0 Disable 1 Enable The factory setting is Disable Configure Edit Leased S93 V 29 Retrain When enabled the modem transmits a training sequence whenever it receives one This configuration option should normally be disabled for control modems Register has the following values 0 Enable 1 Disable The factory setting is Enable Co...

Page 264: ...ter has the following values 0 Enable 1 Disable The factory setting is Enable Configure Edit Leased S97 Reduced Asynchronous Buffer Size Register limits the modem s buffer size to a maximum of 20 characters Register has the following values 0 Disable 1 Enable The factory setting is Disable Configure Edit V42 MNP Buffer S98 Special Standby Supports automatic dial standby when a third modem is used ...

Page 265: ...COMSPHERE 392xPlus Modems 14 32 October 1998 3920 A2 GH30 40 ...

Page 266: ...A 1 3920 A2 GH30 40 October 1998 Menu Tree Overview A 1 Overview Pages A 2 and A 3 provide a menu tree for the 392xPlus modems A ...

Page 267: ... Dial_Line V42 MNP Buffer Misc MUX Copy Port1 Port2 Port3 Port4 Rate Async EIA Mux Enabled only Singleport mode only Singleport mode Async only Not shown when the Digital Bridge configuration option is enabled DeviceHS VF Identity DTE Backup Options Record Major Minor Status Dial Thresh Security Port1 Port2 Port3 Port4 SigQual RcvLevel Sig Noise NrEchLv FarEchLv FarEchDel EchoFreqOff Phase Hts Imp...

Page 268: ...ata blckd ExitRem appears instead of Remote when using Remote mode from previous page Dial Disconnect Answer Dial_Standby or Return_to_Dial Change_Directory Directory Locations 1 24 Dial Backup only Abort Self Loc_Analog_Loop Rem_Digital_Loop Loc_Digital_Loop Pattern 98 15921b Speaker Reset Data_Stream EIA_LEDS Make_Busy or RemoveMakeBusy Service_Line or DiscServLine Download_Code DownloadSoftware...

Page 269: ...COMSPHERE 392xPlus Modems A 4 October 1998 3920 A2 GH30 40 ...

Page 270: ... 1 Modem Health Symptom Action The modem did not pass the power up self test Contact your service representative The power LED does not light or the LCD does not display information Make sure the modem s ON OFF switch is in the ON position Make sure the power supply is connected to the dc power receptacle on the modem If the Power LED and or LCD do not operate contact your service representative A...

Page 271: ...d for the appropriate leased line mode For example if you have a 4 wire leased line then the modems must be configured for 4 wire operation Table B 3 Dial Backup Operation Symptom Action The dial backup line is present but the modems cannot connect Verify that the correct telephone number for the remote modem is stored in directory location 1 Verify that both modems have the Auto Dial Backup confi...

Page 272: ...ion is enabled Refer to DTE Dialer in Chapter 5 Configure Branch Reload the Async Dial factory configuration area to guarantee that all configuration options are returned to their proper setting Make sure that all AT commands are terminated with a carriage return Verify that the Carriage Return Character configuration option matches what is used by the DTE Refer to DTE Dialer in Chapter 5 Configur...

Page 273: ... to operate at the same modulation scheme as the originating modem to see if they connect The Originate Mode does not function properly Verify that the modem s DTE Dialer Type configuration option is set to the correct setting either AT DTR Dialing V 25bis Async V 25bis Bisync or V 25bis HDLC Refer to DTE Dialer in Chapter 5 Configure Branch The modem does not go off hook and begin dialing If usin...

Page 274: ...rror rates occur when running a local loopback or self test Incoming rings can cause data errors during a loopback test Abort the test disconnect the modular VF cord and restart the test Table B 6 Online Operation Symptom Action The data is scrambled Verify that the character format data bits parity and stop bits is set to the same value in both modems Data is missing during a transfer Verify that...

Page 275: ...ature is enabled Verify that both the Answer and Originate security options are disabled Refer to sections Set Answer Sec and Set Orig Sec in Chapter 12 Security The Dial Line Rate or LeasedLine Rate configuration option is set to an invalid modulation Refer to the Dial Line or Leased Line configuration option in the Multiport Mode section of Chapter 5 Configure Branch for the valid rates ...

Page 276: ...Overview C 1 EIA 232 D Pin Assignments C 2 VF Connector Pin Assignments C 3 Auxiliary Cables Not Supplied C 4 Overview This appendix lists EIA 232 D and VF TELCO pin assignments and provides information about auxiliary cables which are not supplied C ...

Page 277: ... 8 LSD CF 109 DCE Line Signal Detect 9 12V Reserved for test purposes may be used to drive one RS 232 load 10 12V Reserved for test purposes may be used to drive one RS 232 load 11 Unassigned 12 CT112 CI 112 DCE Data Signal Rate Select 13 Reserved for future function 14 Reserved for future function 15 TXC DB 114 DCE Transmit Clock 16 Reserved for future function 17 RXC DD 115 DCE Receive Clock 18 ...

Page 278: ...lus modular jacks as well as the pin assignments for the TELCO jacks See Figure C 1 Table C 2 VF Connector Pin Assignments Type of Telco Jack Pin Leased Dial RJ11 JM8 6 Pin Leased 1 4 Wire TX 2 Wire TX RX Ring 1 2 4 Wire TX 2 Wire TX RX Tip 1 3 4 Ring Ring Ring 5 Tip Tip Tip 6 7 4 Wire RX Tip 8 4 Wire RX Ring Figure C 1 VF Pin Orientation ...

Page 279: ... 3920 A2 GH30 40 Auxiliary Cables Not Supplied To add an external telephone to your modem use an external Y cable to connect the phone line to both the modem and the telephone Figure C 2 Figure C 2 Wiring Diagram Y Cable for External Telephone ...

Page 280: ...transmit levels permitted in the private line service and those permitted in the public switched network The industry standard is now an 8 pin keyed modular jack known as the USOC JM8 Bellcore Technical Reference TR EOP 000242 Issue 1 released May 1985 When ordering the installation of the USOC JM8 specify the appropriate wiring options 2 wire operations 4 wire operations w o TEK leads 4 wire oper...

Page 281: ...r cable Figure C 4 1 2 3 4 5 6 7 8 25 POSITION PLUG PIN NO 25 POSITION PLUG PIN NO 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 TXD RXD RTS DSR SG LSD RXC DTR XTXC TXD RXD RTS DSR SG LSD RXC DTR XTXC CT140 CT142 TEST CT142 TEST CT140 Figure C 4 Wiring Diagram 25 Pin Crossover Cable ...

Page 282: ...sponse LSN D 5 Command Response D 6 Valid VAL D 6 Invalid INV D 6 Overview This appendix describes V 25bis dialing commands and responses ITU T V 25bis is an international dialing protocol that permits direct and stored number dialing using DTEs in either Asynchronous bisynchronous or HDLC operating mode The 392xPlus modems support V 25bis request and answer commands As commands are entered from t...

Page 283: ...to the ATDS command The CRS command format is CRSx Where x is directory location 1 24 The modem responds to the command with either a VAL valid or INV invalid response followed by a call progress report such as connect CNX or failure CFI Call Response A Call Response indicates if the command was accepted by the modem Call Response includes Call Failure Indication CFI and Call Connecting CNX Call F...

Page 284: ...owed to call the number DLC is similar to the AT result code DELAYED The DLC response format is DLCn Where n is the delay in minutes before the number can be called Call Answer Commands Call Answer commands disable or enable the modem s AutoAnswer function These commands are issued from the DTE Call Answer commands include Incoming Call INC Disregard Incoming Call DIC and Connect Incoming Call CIC...

Page 285: ...umber to a specific directory location PRN is similar to the AT Z command The PRN command format is PRNx n Where x is the directory location 1 24 n is the telephone number Request List of Delayed Numbers RLD The Request List of Delayed Numbers RLD command displays telephone numbers that are currently delayed as a result of failed call attempts All the numbers currently delayed are displayed irresp...

Page 286: ...rectory location List Delayed Numbers Response LSD LSD is a response to an LSD command issued by DTE LSDx n d Where x is a sequence number not a directory location n is the telephone number d is the delay in minutes List Forbidden Numbers Response LSF The LSF response format is LSFx n Where x is a sequence number not a directory location n is the telephone number List Stored Number Response LSN LS...

Page 287: ...V 25bis command from the DTE INV is similar to the AT result code ERROR The INV response format is INVxx Where xx is CU command unknown MS message syntax error PS parameter syntax error PV parameter value error Table D 1 lists V 25bis commands supported by the 392xPlus modems Table D 1 1 of 2 V 25bis Commands V 25bis Command Description AT Command S Register Equivalent Call Request Commands CRN Ca...

Page 288: ... List Response LSD List Delayed Numbers NONE LSF List Forbidden Numbers NONE LSN List Stored Numbers NONE Table D 2 lists V 25bis response messages supported by the 392xPlus modems Table D 2 V 25bis Response Messages V 25bis Command Description AT Command Result Code Equivalent Call Response CFI Call Failure Indication BUSY NO ANSWER NO CARRIER NO DIAL TONE ERROR CNX Call Connecting Indication CON...

Page 289: ...COMSPHERE 392xPlus Modems D 8 October 1998 3920 A2 GH30 40 ...

Page 290: ...rol Character Key 00 000 NUL CTRL 01 001 SCH CTRL A 02 002 STX CTRL B 03 003 EXT CTRL C 04 004 EOT CTRL D 05 005 ENQ CTRL E 06 006 ACK CTRL F 07 007 BEL CTRL G 08 008 BS CTRL H 09 009 HT CTRL I 0A 010 LF CTRL J 0B 011 VT CTRL K 0C 012 FF CTRL L 0D 013 CR CTRL M 0E 014 SO CTRL N 0F 015 SI CTRL O 10 016 DLE CTRL P 11 017 DC1 CTRL Q 12 018 DC2 CTRL R 13 019 DC3 CTRL S 14 020 DC4 CTRL T 15 021 NAK CTR...

Page 291: ... W 18 024 CAN CTRL X 19 025 EM CTRL Y 1A 026 SUM CTRL Z 1B 027 ESC CTRL 1C 028 FS CTRL 1D 029 GS CTRL 1E 030 RS CTRL Ax 1F 031 US CTRL _ 20 032 spacebar 21 033 22 034 23 035 24 036 25 037 26 038 27 039 28 040 29 041 2A 042 2B 043 2C 044 2D 045 2E 046 2F 047 30 048 0 31 049 1 32 050 2 33 051 3 34 052 4 35 053 5 36 054 6 37 055 7 38 056 8 39 057 9 3A 058 3B 059 3C 060 3D 061 ...

Page 292: ...ASCII Value 3E 062 3F 063 40 064 41 065 A 42 066 B 43 067 C 44 068 D 45 069 E 46 070 F 47 071 G 48 072 H 49 073 I 4A 074 J 4B 075 K 4C 076 L 4D 077 M 4E 078 N 4F 079 O 50 080 P 51 081 Q 52 082 R 53 083 S 54 084 T 55 085 U 56 086 V 57 087 W 58 088 X 59 089 Y 5A 090 Z 5B 091 5C 092 5D 093 5E 094 5F 095 60 096 61 097 a 62 098 b 63 099 c 64 100 d ...

Page 293: ...ecimal ASCII Value Key Control Character Decimal ASCII Value 65 101 e 66 102 f 67 103 g 68 104 h 69 105 i 6A 106 j 6B 107 k 6C 108 l 6D 109 m 6E 110 n 6F 111 o 70 112 p 71 113 q 72 114 r 73 115 s 74 116 t 75 117 u 76 118 v 77 119 w 78 120 x 79 121 y 7A 122 z 7B 123 7C 124 7D 125 7E 126 7F 127 delete ...

Page 294: ...n options labeled Sync Leased Async Leased TMp Trellis Multipoint Async Dial Sync Dial and UNIX Dial These six sets contain the most commonly used configuration options for modems installed into these hardware environments For information on setting the default configuration options refer to the Overview section in Chapter 5 Configure Branch F ...

Page 296: ...Disable Ports 2 3 4 A ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 4800 Port1 or Disable Ports 2 3 4 A ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 4800 Port1 or Disable Ports 2 3 4 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Rate at 2400 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 2400 Port1 or Disable Ports 2 3 4 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 2400 Port1 or Disable Ports 2 3 4 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 2400 Port1 or Disable Ports 2 3 4 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 2400 Port1 or Disable Ports 2 3 4 A ÁÁÁÁÁÁ...

Page 301: ...ÁÁÁ Disable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Disable F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ V 29 Retrain Fl ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Enable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Enable ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Enable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Enable F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Enable F ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Enable F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ V 29 Link Configuration l ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Point to Point ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Point to Point ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Point to Point ÁÁÁÁÁ ...

Page 305: ...COMSPHERE 392xPlus Modems F 12 October 1998 3920 A2 GH30 40 ...

Page 306: ...9 Point to Point with Network Management G 10 Configuration Options G 10 Cables G 11 Carrier with Network Management G 12 Configuration Options G 13 Cables G 13 Extended Diagnostics G 14 Configuration Options G 14 Cables G 15 Adapter G 15 Digital Bridging G 16 Cables G 17 Point to Point MSD G 18 Cables G 18 Multipoint MSD G 20 Cables G 21 Overview This appendix provides diagrams of sample configur...

Page 307: ...able 1 9600 9600 4800 4800 DTE Sync DTE Sync DTE Sync DTE Sync DTE Sync 3920Plus A 3920Plus B 1 2 3 4 1 2 3 4 Figure G 1 Sample Configuration Point to Point Configuration Options 3920Plus A Use Sync Leased Answer default configuration options with the following exception Rate Refer to Sample Port Rate Table in this section 3920Plus B Use Sync Leased Originate default configuration options with the...

Page 309: ...e 3 9600 9600 4800 4800 DTE Sync DTE Sync DTE Sync DTE Sync 3920Plus A 3920Plus B 3910 B 3910 A 1 2 3 4 1 2 3 4 4800 Figure G 2 Sample Configuration Extended Point to Point Configuration Options 3920Plus A Use Sync Leased Answer default configuration options with the following exception Rate Refer to Sample Port Rate Table in this section 3920Plus B Use Sync Leased Originate default configuration ...

Page 311: ...Cable 1 Cable 1 Cable 1 9600 9600 4800 4800 Cable 1 Cable 1 Cable 1 Cable 3 9600 9600 4800 4800 DTE Sync DTE Sync DTE Sync DTE Sync 3920Plus A 3920Plus B 1 2 3 4 1 2 3 4 Cable 1 Cable 2 Cable 2 Leased 4800 TMp 4800 TMp TX TX Cable 1 Cable 2 4800 TMp TX DTE Sync 3910 A 3910 B 3910 C Addr 1 DTE Sync Addr 2 This FEP Port is Running the Multipoint Application 4800 Figure G 3 Sample Configuration Exten...

Page 312: ...tions with the following exceptions Tx Clock Source Set to RXC_Loop LeasedLine Rate Set to 4800 TMp Autorate Leased Line Set to Disable Sample Port Rate Table Port Rate Port 1 Port 2 Port 3 Port 4 ÁÁÁ ÁÁÁ 28 8KÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁ ÁÁÁ 9600 ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ 24 0K ÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 19 2K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁ...

Page 313: ...er 818 2759 0111 or an equivalent customer supplied EIA 232 D V 24 crossover cable with DB 25 P plug connectors on both ends to attach to the modems See Appendix C Pin Assignments Point to Point with Automatic Dial Backup Figure G 4 shows a sample configuration for point to point applications with automatic dial backup Cable 1 Cable 1 Cable 2 Cable 2 Leased 28800 V34 28800 V34 TX TX Cable 4 Cable ...

Page 314: ...le ÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 14 4K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ 12 0KÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ DisableÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ 9 6KÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ DisableÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ 7 2K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 4 8K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Dis...

Page 315: ...lus A 3920Plus B 1 2 3 4 1 2 3 4 NMS 6700 or 6800 Adapter 002 0025 0031 NMS CC IN 3600 F3 300 Hubbing Device Cable 5 Figure G 5 Sample Configuration Point to Point with Network Management Configuration Options 3920Plus A Use Sync Leased Answer default configuration options with the following exceptions Rate Refer to the Sample Port Rate Table in this section Diag Connection Set to NMS CC NetworkPo...

Page 317: ...nt Cable 1 Cable 2 Cable 2 Leased 28800 V34 28800 V34 TX TX Cable 1 Cable 1 Cable 1 9600 9600 4800 4800 Cable 1 Cable 1 Cable 1 Cable 1 9600 9600 4800 4800 DTE Sync DTE Sync DTE Sync DTE Sync DTE Sync 3921Plus A 3920Plus B 1 2 3 4 1 2 3 4 NMS 6700 or 6800 Adapter 002 0025 0031 CC IN SDU Circuit Card COMSPHERE 3000 Series Carrier Cable 5 Figure G 6 Sample Configuration Carrier with Network Manageme...

Page 318: ...ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ 12 0KÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ DisableÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ 9 6KÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ DisableÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ 7 2K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 4 8K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁ...

Page 319: ...cs Configuration Options 3920Plus A Use Sync Leased Answer default configuration options with the following exceptions NetworkPosition Set to Control Diag Connection Set to NMS CC NetMngmtAddress Set to 1 3920Plus B Use Sync Leased Originate default configuration options with the following exceptions Tx Clock Source Set to RXC Diag Connection Set to Modem DC Port Tx Source Set Port 1 to External ...

Page 320: ...IA 232 D V 24 cable with a DB 25 P plug connector at one end to attach to the modem Attach this to the connector labeled DTE1 2 3 or 4 Cable 2 Use part number 125 0053 1431 an 8 position 8 wire modular cord that is supplied with the modem Attach this to the connector labeled LEASED Cable 3 Use part number 818 2759 0111 or an equivalent customer supplied EIA 232 D V 24 crossover cable with DB 25 P ...

Page 321: ...3 Addr 4 Addr 5 Cable 1 Cable 1 Cable 1 Cable 1 Figure G 8 Sample Configuration Digital Bridge 3920Plus A Use TMp Control Template default configuration options with the following exception MUX Mode Set to DTE Bridge 3920Plus B C Use Sync Dial template default configuration options with the following exceptions MUX Mode Set to DTE Bridge NetworkPosition Set to Control Diag Connection Set to NMS CC...

Page 322: ... Line Rate Set to 14400 V32 Cables Cable 1 Use a standard customer supplied EIA 232 D V 24 cable with a DB 25 P plug connector at one end to attach to the modem Attach this to the connector labeled DTE1 2 3 or 4 Cable 2 Use part number 125 0053 1431 an 8 position 8 wire modular cord that is supplied with the modem Attach this to the connector labeled LEASED Cable 3 Use part number 818 2759 0111 or...

Page 323: ...Table in this section 3920Plus B Use Sync Lease Originate Template default configuration options with the following exceptions MSD Control Set Ports 1 2 and 3 to Enable Rate Refer to the Sample Port Rate Table in this section Cables Cable 1 Use a standard customer supplied EIA 232 D V 24 cable with a DB 25 P plug connector at one end to attach to the modem Attach this to the connector labeled DTE1...

Page 324: ... ÁÁÁ 4 8K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁ ÁÁÁ 2 4KÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ DisableÁÁÁ ÁÁÁ Disable Sample Port Rate Table Point to Point MSD 3920Plus B Port Rate Port 1 Port 2 Port 3 Port 4 ÁÁÁ ÁÁÁ 28 8KÁÁÁÁ ÁÁÁÁ 19200 ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ DisableÁÁÁ ÁÁÁ 9600 ÁÁÁ ÁÁÁ 24 0KÁÁÁÁ ÁÁÁÁ 14400 ÁÁÁ ÁÁÁ N A ÁÁÁÁ ÁÁÁÁ N A ÁÁÁ ...

Page 325: ...Sync DTE Sync DTE Sync DTE Sync DTE Sync 19200 TMp 19200 TMp Leased Cable 2 Cable 1 Cable1 Addr 1 Addr 2 Addr 3 Addr 4 Addr 5 Addr 6 Addr 7 Addr 8 Addr 9 Addr 10 Addr 11 Addr 12 Cable 1 3920Plus D Figure G 10 Sample Configuration Multipoint MSD 3920Plus A Use TMp Control Template default configuration options with the following exception NetworkPosition Set to Control 3920Plus B C D Use TMp Contro...

Page 326: ...r supplied EIA 232 D V 24 cable with a DB 25 P plug connector at one end to attach to the modem Attach this to the connector labeled DTE1 2 3 or 4 Cable 2 Use part number 125 0053 1431 an 8 position 8 wire modular cord that is supplied with the modem Attach this to the connector labeled LEASED ...

Page 327: ...COMSPHERE 392xPlus Modems G 22 October 1998 3920 A2 GH30 40 ...

Page 328: ...ances The ITU T recommendations V 42bis and V 42 have data compression and error correcting EC procedures for DCEs connected to asynchronous DTEs These procedures form the basis for Paradyne s SDC feature Within the SDC feature two DTEs can exchange data via a synchronous protocol Figure H 1 while the DCE provides the new synchronous data compression and error correction functions Figure H 2 The s...

Page 329: ... Synchronous Data Format A 392xPlus modem with the SDC feature supports DTE frame sizes up to 4300 bytes This conforms to the X 25 recommendation which defines a maximum size of data packets as equal to 4096 bytes If the modem has the SDC Delay Min configuration option set to Rx_Clock there is no limitation on the DTE frame size for the DTE frames transmitted from the remote modem to the local mod...

Page 330: ...Max Frame Size Cellular Enhance DTE Interface Sync DTE Rate Tx Clock Source Bakup_TXClk_Src Refer to Chapter 5 Configure Branch for more information on the above configuration options SDC Configuration Options Considerations When the Sync Comp Mode configuration option is not set to Direct the SDC Idle Fill configuration option is available The Flag_Fill setting is the default and causes the modem...

Page 331: ...he DTE DCE line or clock frequencies in the range from 1 2 kHz to 128 kHz When the transmit clock is provided by the DTE the receive clock is set by the modem equal to the DTE clock Figure H 4 When SDC is in use the Tx Clock Source configuration option cannot be set to Receiver Clock Loop NOTE When faster speeds are used above 57 6 kHz and the transmit clock is provided by the modem data transmiss...

Page 332: ...ept supplementary data this is flow control Flow control is also required in Buffer mode since the DTE rate and the line rate can be different Three methods are used to control the DTE flow Hardware signal CTS circuit 106 Pin 5 Transmit clock circuit 114 Pin 15 If the transmit clock is clamped then the DTE stops sending data This method only works when the transmit clock is provided by the modem t...

Page 333: ...t to the maximum possible value DTE frame size configuration parameter If SDC modems are used between synchronous DTEs then the DCE frame size and not the DTE frame size must take into account the line error rate Set the DTE frame size to as large a value as your DTE and your DTE application can handle This reduces the significance of DTE frame overhead and reduces the delay expressed in number of...

Page 334: ...DC enabled with LAPM_Buffer negotiation SDC enabled with LAPM_Discon negotiation SDC connection SDC enabled with LAPM_Discon negotiation SDC enabled with LAPM_Buffer negotiation SDC connection SDC enabled with LAPM_Discon negotiation SDC enabled with LAPM_Discon negotiation SDC connection SDC enabled with LAPM_Buffer negotiation SDC disabled BufferMode connection with no Error Control SDC enabled ...

Page 335: ...COMSPHERE 392xPlus Modems H 8 October 1998 3920 A2 GH30 40 ...

Page 336: ... length 125 0053 1431 Universal Power Supply 3920 A1 xxx 327 0074 XXXX Unregulated 100 vac Power Supply 3920 A2 xxx 327 0086 0131 Unregulated 110 vac Power Supply 3920 A2 xxx 327 0073 0131 Unregulated 230 vac Power Supply 3920 A2 xxx 327 0096 0131 3600 Hubbing Device 3600 F3 300 EIA 323 D V 24 Crossover Cable 818 2759 0111 6 position 6 wire modular cord 125 0040 0031 8 position 8 wire modular cord...

Page 337: ...COMSPHERE 392xPlus Modems I 2 October 1998 3920 A2 GH30 40 ...

Page 338: ...data services ASCII is the standard for data transmission over telephone lines The ASCII code consists of 32 control characters nondisplayed and 96 displayed characters Refer to Appendix E asynchronous transmission A data transmission that is synchronized by a transmission start bit at the beginning of a character five to eight bits and one or more stop bits at the end AT Command mode The idle sta...

Page 339: ...come an industry standard It uses a defined set of control characters and control character sequences for synchronized transmission of binary coded data between stations in a data communications system bit A contraction of binary digit A bit which is the smallest unit of information represents the choice between a one or a zero sometimes called mark or space bps Bits per second Indicates the speed...

Page 340: ...face between a network management system and a network device control modem A control modem polls downstream tributary modems across the analog channel controlled carrier mode The modem s transmitter turns on and off in response to RTS This mode is used by multipoint tributary modems CTS Clear to Send A signal indicating that the device is ready for the DTE to transmit data Usually occurs in respo...

Page 341: ...ta to be transmitted Anything that is compressed is restored after the data is received demodulation The process of recovering data from a modulated carrier wave DevHS Device Health and Status A detailed account of device alarms Diagnostic Channel DC The diagnostic interface between two network devices used to extend the NMS diagnostics to downstream devices dial command modifiers A modifier used ...

Page 342: ...ic Industries Association s standard defining the 25 position interface between data terminal equipment and data communications automatic calling equipment error control An algorithm used to correct data transmission errors escape sequence Default setting is This sequence lets you switch your modem from Data mode to Command mode extended circuit See extended network extended network The extension ...

Page 343: ...quency equal to 1 000 cycles per second keypad A set of seven keys surrounding the DCP s LCD These keys are used to select configuration options and to maneuver through the DCP menu LCD Liquid Crystal Display A thin sandwich of two sealed glass plates containing liquid crystal material When voltage is applied the amount of light able to pass through the glass plates is altered so that messages may...

Page 344: ...option is set to TDM MSD or DTE_Bridge It supports from one to four ports depending on how the modem is further configured network A communications circuit network management address The customer assigned diagnostic address of a modem NIM Network Interface Module The interface provided up to two per carrier for the public switched telephone network PSTN non linear distortion VF line distortion whi...

Page 345: ...the modem register A part of the modem s memory that contains values that determine the modem s operating characteristics Remote A branch of the Top Level menu that permits access to the DCP of another modem remote loopback A test that sends a signal to the remote modem to test the local modem the remote modem and the circuit between them result code An asynchronous message in either numbers or wo...

Page 346: ...rences in downstream modems synchronous transmission Transmission in which the data characters and bits are transmitted at a fixed rate with transmitter and receiver synchronized This eliminates the need for start and stop bits as used in asynchronous transmission and is thus faster and more efficient TDM Time Division Multiplexer A device that enables the simultaneous transmission of multiple ind...

Page 347: ...4 400 bps V 32terbo A modulation that adds the 19 200 bps and 16 800 bps data rates to the V 32bis data rates It is a Paradyne proprietary modulation not a ITU T standard V 34 A ITU T standard for modems operating full duplex with asynchronous or synchronous data over leased lines or dial networks at 33 600 31 200 28 800 26 400 24 000 21 600 19 200 16 800 14 400 12 000 9600 7200 4800 or 2400 bps V...

Page 348: ... 5 39 asynchronous operation 2 13 5 2 5 13 5 37 Asynchronous Overspeed 5 14 Asynchronous Synchronous Mode AT command 14 11 Multiport mode 5 13 Singleport mode 5 37 AT commands allowing use 5 45 command list 14 5 14 15 command mode 14 1 data mode 14 1 escape character 5 46 response to invalid 5 48 S Register 14 29 result codes 14 3 14 5 using commands 14 1 14 2 AT escape character 5 46 S Register 1...

Page 349: ...atibility 1 14 COMSPHERE 3000 Series Carrier Model 3921Plus installation and removal 2 8 2 14 network interface module NIM 2 2 7 7 service line 7 7 7 8 COMSPHERE 6700 Series NMS 1 1 configuration options defaults 2 13 2 14 5 2 F 2 F 7 displaying with AT command 14 12 quick display 3 14 samples G 1 tables Security 12 14 12 16 writing to memory 14 12 Configuration Tables 5 8 Multiport mode 5 8 Singl...

Page 350: ...ort mode 5 13 Singleport mode 5 38 connection 2 6 2 7 B 3 status 3 2 3 5 4 9 synchronous data rate 5 37 DTE Alarm Mask Multiport mode 5 18 S Register 14 20 Singleport mode 5 44 DTE Bridge See digital bridging DTE Dialer configuration options group 5 45 DTE Dialer Type 5 45 AT command 14 11 DTE Interface configuration options group Multiport mode 5 10 Singleport mode 5 37 DTE Local Loopback Multipo...

Page 351: ...5 installation Model 3920Plus 2 3 2 14 Model 3921Plus 2 8 2 12 K keypad 3 7 3 8 L LAPM 5 64 5 65 LCD liquid crystal display description 3 1 3 6 3 7 menu structure 3 9 3 10 messages 3 10 4 3 4 4 4 14 4 15 Lease Lookback Multiport mode 5 29 Singleport mode 5 62 leased backup operation See backup leased leased line modulation 5 25 5 57 rates 1 14 5 25 5 57 telephone interface 1 13 transmit level 1 14...

Page 352: ...ine 1 14 5 22 5 53 14 22 leased line 1 14 5 25 5 57 14 23 MSD Port Control 5 12 multiplexer TDM See MUX mode multipoint operation 1 8 1 10 multiport backup 1 10 Multiport mode 1 6 1 10 5 8 configuration options Dial Line 5 22 5 24 DTE Interface 5 10 5 18 leased line 5 25 5 29 Line Dialer 5 19 5 21 Misc 5 31 5 36 Test 5 30 multiport modem 1 3 1 6 model 3921Plus 1 5 operational mode 1 6 MUX mode 1 6...

Page 353: ...ack Response Multiport mode 5 17 Singleport mode 5 72 Record Status branch 4 16 4 18 Reduced Asynchronous Buffer Size 5 71 S Register 14 31 Remote access password 5 4 5 9 5 31 5 74 13 2 13 3 13 4 S Registers 14 25 branch 3 9 13 1 13 4 remote digital loopback test 8 5 8 6 Repeat Last Command 14 6 requirements ac power 1 13 government 1 10 1 12 Reset and Load Active AT command 14 8 reset control 7 3...

Page 354: ...Multiport mode 5 28 S Register 14 31 Singleport mode 5 61 specifications technical 1 13 1 14 standalone multiport modem 1 2 singleport modem 1 2 status backup 4 13 DTE 4 9 modem 4 3 SDC 4 10 V 34 rates 4 11 VF connection 4 5 Status branch 3 9 4 1 4 18 status indicators LEDs 3 2 3 5 straps See configuration options Straps When Disconnected Multiport mode 5 31 S Register 14 29 Singleport mode 5 73 S...

Page 355: ...5 56 asymmetric rate leased Multiport mode 5 26 Singleport mode 5 59 V 34 modulation 1 9 4 11 dial line 14 18 leased lines 1 9 14 18 quick display 3 14 V 34 Precoder Multiport mode 5 23 S Register 14 19 Singleport mode 5 56 V 34 Symbol Rate Multiport mode 5 23 Singleport mode 5 55 V 42 ARQ Window Size Increase S Register 14 29 V 42 error control 5 64 V 42 MNP Buffer configuration options group 5 6...

Page 356: ... 3920 A2 GH30 40 3920 A2 GH30 40 ...

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