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Paradyne COMSPHERE 392xPlus, Installation And Operation Manual

Introducing the Paradyne COMSPHERE 392xPlus—an advanced communication solution! Unlock its full potential with the comprehensive Installation and Operation Manual, available for free download at manualshive.com. This indispensable manual provides step-by-step instructions and important insights to ensure seamless setup and optimal performance of your new Paradyne COMSPHERE 392xPlus.

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DCP Configuration

4-59

3920-A2-GN31-30

November 1996

Table 4-12

(2 of 6)

V.42/MNP/Buffer Configuration Options — Singleport Mode 

A

Err Contrl Mode: V.42/MNPorBfr (Cont.)

The AT command for Buffer Mode is \N0.
The AT command for Direct Mode is \N1.
The AT command for MNP or Disconnect is \N2.
The AT command for MNP or Buffer is \N3.
The AT command for V42/MNP or Disconnect is \N4.
The AT command for V42/MNP or Buffer is \N5.
The AT command for LAPM or Disconnect is \N6.
The AT command for LAPM or Buffer is \N7.

V42bis Compress:  Enable
Nxt   Enable   Disable

This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control
Mode is configured for V42/MNPorBfr or V42/MNPorDsc.

V.42bis Data Compression. Enables or disables V.42bis data compression.

Enable – Data compression operates in both the transmit and receive directions. This is the recommended setting for all
applications.

Disable – V.42bis data compression is disabled. This is rarely needed because V.42bis data compression does not
cause data expansion for compressed data.

The AT command for Disable is 

I

H0.

The AT command for Enable is 

I

H1, 

I

H2, or 

I

H3.

MNP5 Compress:  Enable
Nxt   Enable   Disable

This configuration option only appears when Async/Sync Mode 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:  Disable
Nxt   Disable   Enable   Disab&Switch

This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control
Mode is configured for V42/MNPorBfr, MNP_or_Buffr, or LAPM_or_Bufr.

Error Control Negotiate Buffer. Determines if the answering modem buffers the data that it received from the remote
modem during an interval in which the modem attempts to establish a connection using error control. Online changes do
not take effect until a disconnect occurs.

Disable – Data is not buffered during the link negotiating (handshaking) sequence.

Enable – Data is buffered while the link is being established. Initialization data is not passed on the DTE during the
handshaking sequence.

Disable and Switch – Data is not buffered during the handshaking sequence. However, when the modem receives an
error control fallback character, it switches to Buffer mode. (Refer to the EC Fallback Char configuration option.)

The AT command for Disable is \C0.
The AT command for Enable is \C1.
The AT command for Disab&Switch is \C2.

Summary of Contents for COMSPHERE 392xPlus

Page 1: ...COMSPHERE 392xPLUS MODEMS MODELS 3920PLUS AND 3921PLUS INSTALLATION AND OPERATION MANUAL Document No 3920 A2 GN31 30 November 1996 ...

Page 2: ...ed 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 International call 813 530 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 1996 Paradyne Corporation All rights reserved This publicat...

Page 3: ...ified service 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 nec...

Page 4: ...COMSPHERE 392xPlus Modems C November 1996 3920 A2 GN31 30 Notices ...

Page 5: ... 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 6 Model 3921Plus Modem Installation 2 6 Removing and Replacing the Model 3921Plus Modem 2 11 392xPlus Modem Power Up 2 11 Selecting Factory Configuration Options for 392x...

Page 6: ...rt Mode A 4 31 5 AT Command Set and S Registers Overview 5 1 Operating Modes 5 1 Command Guidelines 5 2 AT Command List 5 5 S Register List 5 15 6 Dial Access Security Overview 6 1 Security Branch 6 4 Security Configuration Options 6 13 Security Password Entry Techniques 6 15 Database Table Examples 6 16 Appendices A Menu Tree A 1 B Troubleshooting B 1 C Pin Assignments C 1 D CCITT V 25bis Dialing...

Page 7: ...attern Test and Digital Loopback Test 3 62 3 9 End to End Pattern Test 3 62 3 10 Dial Backup 3 68 4 1 DCP Configuration Process 4 2 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...

Page 8: ...onfiguration Options Singleport Mode 4 33 4 8 DTE Dialer Configuration Options Singleport Mode 4 41 4 9 Line Dialer Configuration Options Singleport Mode 4 46 4 10 Dial Line Configuration Options Singleport Mode 4 50 4 11 Leased Line Configuration Options Singleport Mode 4 53 4 12 V 42 MNP Buffer Configuration Options Singleport Mode 4 58 4 13 Test Configuration Options Singleport Mode 4 64 4 14 M...

Page 9: ...le Page B 6 Online Operation B 5 B 7 Mux Operation B 5 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 ...

Page 10: ...trol panel SDCP Chapter 4 provides the information required to set configuration options in the 392xPlus modems using the modem s diagnostic control panel Chapter 5 provides instructions for using AT commands and S Registers Chapter 6 provides instructions for using the Dial Access Security feature Appendix A provides a menu tree for the 392xPlus modems Appendix B provides instructions for perform...

Page 11: ...0 A2 GZ45 3600 Hubbing Device Feature Number 3600 F3 300 Installation Instructions 3920 A2 GK41 COMSPHERE 392xPlus Modems Models 3920Plus and 3921Plus Installation Instructions 3920 A2 GK40 COMSPHERE 3900 Series Modems Model 3921Plus Ferrite Choke Installation Instructions Call your sales representative to order additional product documentation ...

Page 12: ...s 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 Operations for more information regarding downloading options The 392xPlus modems support a wide range of modulation schemes and offer control using either AT commands the diagnostic c...

Page 13: ...ither 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 status indicators For a better understanding of DCP operation refer to Chapter 3 DCP Operation Model 3920Plus Standalone Multiport Modem The Model 3920Plus multiport is a standalone modem Figure 1 1 with an integral time division multiplexer TDM and a modem sh...

Page 14: ...POWER SUPPLY POWER CORD 496 14684 01 LEASED Model 3920Plus Singleport and Multiport Housing Singleport Modem Back Panel Multiport Modem Back Panel POWER ON OFF DIAL DTE 1 NMS POWER IN DTE 2 DTE 3 DTE 4 POWER ON OFF LEASED DIAL DTE 1 NMS POWER IN Figure 1 1 Model 3920Plus Standalone Singleport and Multiport Modems ...

Page 15: ... 1 3 equipped with an integral time division multiplexer TDM with a modem sharing device MSD The modem installs into the COMSPHERE 3000 Series Carrier occupying two slots The modem s faceplate covers two slots in the carrier It has twenty 20 LED status indicators for displaying modem activity and an audio speaker jack for the carrier s optional speaker The modem s back panel has four edge card con...

Page 16: ...TOR FUTURE USE BACK CONNECTOR PLATE V 35 3600 3500 RS366A V 25 3800 EIA232 V 24 TXD RXD RTS CTS DSR DTR LSD 103 104 105 106 107 108 109 Pwr Alrm Test Dial RI Busy Serv SQ Status Front Panel 3921Plus 142 125 Spkr EIA232 V 24 CONNECTOR FUTURE USE GROUNDING TAB Figure 1 2 Model 3921Plus Singleport Modem ...

Page 17: ...E EDGE CARD CONNECTORS PORT 3 PORT 4 PORT 1 PORT 2 3921Plus TXD RXD RTS CTS DSR DTR LSD Pwr Alrm Test Dial RI Busy Serv SQ Status Front Panel Spkr 142 125 103 104 105 106 107 108 109 1 3 2 4 Port BACK CONNECTOR PLATES DTE B DTE A DTE B DTE A Figure 1 3 Model 3921Plus Multiport Modem ...

Page 18: ...on the 392xPlus modem model and its selected MUX mode configuration option Table 1 1 392xPlus Operational Modes 392xPlus Modem MUX Mode Configuration Option Operational Mode Singleport n a Singleport Multiport MUX Mode Disabled MUX Mode set to TDM MSD DTE_Bridge Singleport Multiport Multiport Use the identified operational mode Singleport or Multiport to choose the configuration options that are a...

Page 19: ...24 000 19 200 16 800 14 400 12 000 9600 7200 4800 and 2400 bps V 32 terbo 19 200 and 16 800 bps V 32bis 14 400 12 000 9600 7200 and 4800 bps V 32 9600 and 4800 bps and Trellis Multipoint TMp 19 200 14 400 9600 7200 4800 and 2400 bps Mux enabled dial line modulations V 34 family 33 600 28 800 24 000 19 200 16 800 14 400 12 000 9600 7200 4800 and 2400 bps V 32 terbo 19 200 and 16 800 bps V 32bis 14 ...

Page 20: ... 392xPlus multiport modems It provides the ability for dial backup of a multipoint configuration by bridging the signal on the digital side of the FEP end modems In this configuration only two ports both on the FEP side are used on the control and backup modems Data received on Port 1 is transmitted across the communication link as well as looped back out of Port 2 Data received across the communi...

Page 21: ...rtain DTE equipment Also each symbol rate supports a subset of data rates which make up the whole of the V 34 standard Symbol Rate Supported Data Rates 3429 4800 33 6K 3200 4800 31 2K 3000 4800 28 8K 2800 4800 31 2K 2743 4800 31 2K 2400 2400 24 0K When using the V 34 modulation on leased lines with a 2 wire leased backup facility the backup line check feature which tests the backup leased lines fo...

Page 22: ... determine the quantity of devices which may be connected to the telephone line Excessive RENs on the telephone line may result in the devices not ringing in response to an incoming call In most but not all areas the sum of the RENs should not exceed five 5 0 To be certain of the number of devices that may be connected to the line as determined by the total RENs contact the telephone company to de...

Page 23: ...ing an acceptable method of connection In some cases the company s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly telephone extension cord The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an autho...

Page 24: ...CCITT V 22bis 2400 bps CCITT V 27bis 4800 2400 bps CCITT V 33 14 400 12 000 bps CCITT V 29 9600 7200 4800 bps Paradyne Point to Point Diagnostic 2400 bps Dial Line Modulations Paradyne V 34 33 600 31 200 bps CCITT V 34 28 800 26 400 24 000 21 600 19 200 16 800 14 400 12 000 9600 7200 4800 2400 bps Paradyne V 32 terbo 19 200 16 800 bps CCITT V 32bis 14 400 12 000 9600 7200 4800 bps CCITT V 32 9600 ...

Page 25: ...el 3920Plus 1 8 inches 4 6 cm Model 3921Plus Depth 12 1 inches 30 8 cm Model 3920Plus 13 4 inches 34 0 cm Model 3921Plus TRANSMIT LEVEL Leased Line North America 0 through 15 dBm in 1 dBm decrements Factory default is 0 dBm Leased Line All Other Countries 1 through 15 dBm in 1 dBm decrements Factory default is country dependent Dial Line North America 10 through 32 dBm in 1 dBm decrements Factory ...

Page 26: ... Model 3921Plus Modem 2 11 392xPlus Modem Power Up 2 11 Selecting Factory Configuration Options for 392xPlus 2 11 Using the Diagnostic Control Panel DCP 2 12 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 preset config...

Page 27: ...iport 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 Series Carrier...

Page 28: ...of the Model 3920Plus modem Figure 2 1 has the following 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 ...

Page 29: ...K IS ALSO USED FOR 2 WIRE LEASED BACKUP POWER CORD DB 25 S CONNECTORS Figure 2 1 Model 3920Plus Multiport Back Panel and Power Supply DTE Connection Use the following steps to connect an EIA 232 D cable from the modem to a DTE 1 Make sure the modem is powered OFF 2 Connect the DB 25 P plug connector on the cable to a DB 25 S socket connector Figure 2 1 on the modem s back panel labeled DTE 1 DTE 4...

Page 30: ...any provides the line termination jacks for the permissive service you request Advance coordination with the telephone company is suggested when connecting the modem to telephone dial lines PSTN In the Permissive mode the modem s transmit output level is fixed at 9 dBm The telephone company assumes that the line loss is 3 dB and no compensation is provided for additional losses A Permissive mode t...

Page 31: ...ased line and dial modular cord s from the modem s back panel 5 Disconnect the DTE interface cable s from the modem s back panel If the modem is to be removed for service return it to the company using the procedures described in Government Requirements and Equipment Return in Chapter 1 6 Install the replacement modem as described in the Model 3920Plus Modem Installation section of this chapter an...

Page 32: ...n installing the modem 2 At the front of the carrier hold the modem vertically with the latch on its faceplate in the open position and insert it into the top and bottom card guides of one of the slots numbered 1 15 Figure 2 3 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 facep...

Page 33: ...1996 3920 A2 GN31 30 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 3 Installing the Model 3921Plus Modem ...

Page 34: ...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 35: ...ntil it covers the faceplate latch Figure 2 4 and 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 earlier in this chapter 495 14425 02 CIRCUIT PACK LOCK OPEN CLOSED LATCH RELEASE TAB Figure 2 4 Circuit Pack Lock ...

Page 36: ...l menu 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 ...

Page 37: ...ased 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 dis...

Page 38: ...ns 3 21 Clearing VF Counters 3 22 Identity 3 23 DTE 3 24 V 34 3 25 Backup 3 26 Options 3 28 Record 3 28 Service Log 3 29 Configure Branch 3 30 Poll List Branch 3 30 Display 3 31 Clear 3 32 Change 3 32 Add 3 33 Acquire 3 34 Control Branch 3 35 Speaker 3 36 Reset 3 37 Data Stream 3 37 Selecting All Ports 3 38 EIA LEDs 3 39 Make Busy Remove Make Busy 3 40 Service Line Disconnect Service Line 3 41 Dow...

Page 39: ...ch 3 76 Diagnostic Control Panel Access 3 80 Overview This chapter describes how to use the diagnostic control panel DCP of the 392xPlus 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 opt...

Page 40: ...D 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 where...

Page 41: ...RTS CTS 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 Fig...

Page 42: ...not involved 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 hoo...

Page 43: ...he 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 the Control Branch section of this chapter To display...

Page 44: ...rmation 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 These ind...

Page 45: ...r Keypad 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 St...

Page 46: ...ction keys select the choice 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 ...

Page 47: ...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 modem is disconnected from the VF line and Data mode the modem is connected to the VF line when dialing via either the DCP or a telephone Security Used to control the modem s d...

Page 48: ...aining 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 Leased Back p Stndby MR The modem is operating in Dial Standby mode p Leased Backup DialBckUp MR The modem is operating in a Dial Backup mode at the displa...

Page 49: ...t No Dial Tone 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 ...

Page 50: ...isc 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 curre...

Page 51: ... time 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 mod...

Page 52: ...information appears on the LCD s bottom line To access the Quick Configuration display from the Top Level display press the key Based on the configuration of the modem one of two screens appear 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 y...

Page 53: ...cates 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 32 terbo modulation V32b indicates V 32bis modulation V32 indicates V 32 modulation TMp indicates Trellis Multip...

Page 54: ...tions Record Major Minor Status Dial Thresh Security Port1 Port2 Port3 Port4 SigQual RcvLevel Sig Noise NrEchLvl FarEchLv FarEchDel 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 S...

Page 55: ...tions No signal or a very poor signal is being received Streaming DTE The modem is in an antistreaming condition The RTS 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 4 for a description of the RTS Antistream configuration option Access Security A dial access security alarm is active ...

Page 56: ...ction or the Ring Tone Detection portion of the Call Test command Dial Make Busy Mode The modem is in a Make Busy condition 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 ...

Page 57: ...signal is 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 Stre...

Page 58: ... for V 34 V 32 terbo 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 32 terbo 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 transmi...

Page 59: ...ted every minute This parameter appears for V 32 terbo 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 32 terbo V 32bis and V 32 modul...

Page 60: ...tatus 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 identifies the modem as either a Model 3920Plus or Model 3921Plus modem FR...

Page 61: ...n 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 activity since entering the DTE status display An asterisk ind...

Page 62: ...which the modem is transmitting 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 RxRate Modem Receive 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...

Page 63: ...eled DIAL is the backup interface and accepts either 2 wire APL Dual Lease Line or Dial lines To access Backup from the Status branch make the following selection Press the key until Backup 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 3 7 Press the...

Page 64: ...heck configuration option is disabled or not available Refer to the BackupLine Check configuration option in the Leased Line section of Chapter 4 Line Bkup 2w APL or Line Dial 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 ap...

Page 65: ... function and remain in the Status branch press the key To exit and return to the Top Level menu press the key Record Record is a troubleshooting tool used in conjunction with support personnel This function retrieves and reports any sequence faults to support personnel A sequence fault is an irregular or unexpected event There are two selections under Record Display and Clear Display allows up to...

Page 66: ...sage Modem O K appears To exit this function and remain in the Status branch press the key To exit and return to the Top Level menu press the key Service Log Service Log is a troubleshooting tool used in conjunction with support personnel Use this function to retrieve and report Service Log data to support personnel To access Service Log from the Status branch make the following selections F1 Stat...

Page 67: ...s with the Diag Connection configuration option disabled Modems using modulations that do not support the secondary channel Point 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 diagnosti...

Page 68: ...ing 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 poll list Display Display allows you to view the modem s poll list To access Display from the PList branch make the following selection F1 Poll List Display Clear F2 F3 Sele...

Page 69: ...d 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 and return to the Top Level menu press the key Change The Change function does not appear in Remote mode Change allows you to change the modem s poll list To access Change from the PList branch make the following selections F1 P...

Page 70: ... list change occurred If the message Poll List Check appears you attempted to delete an address that is not on the poll list or you attempted to add an address that is already on the poll list If the message Poll Lst too Big appears you exceeded the maximum number of downstream devices To return to the selected function Active Delete or Skip press the key The address automatically increments upon ...

Page 71: ...e NOTE If an error message OtherTestActive or Unable To Acquir appears on the second line of the LCD move up one level in the menu tree to clear the message and return to the PList Acquire branch The OtherTestActive message indicates that a test is running which blocks the Acquire function The Unable To Acquir message indicates that the diagnostic network is in a busy state F1 Poll List Acquir Abo...

Page 72: ... 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 Tlk Data Security Remote Speaker Reset Data_Stream Make_Busy or RemoveMakeBusy Service_Line or DiscServiceLine Download_Code DownLoadSoftware 3921Plus only EIA_LEDs VF_Thresh_Update To access Control from...

Page 73: ... 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 volume High Adjusts the speaker to high volume The message Command Complete appears on ...

Page 74: ... Data Stream to enable or disable the modem s data transmitter function on a specific port or on all ports The Data Stream function is not available in Async mode in Singleport mode 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 Data Stream F1 F1 Select DS Port Port1 Port2 F2 F3 If the mux is e...

Page 75: ... 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 Ports Selecting All will enable or disable the modem s data transmitter function on all ports F1 Select DS Port Port1 All F2...

Page 76: ...d Refer to the Diag Connection configuration option in the Misc section of Chapter 4 The CC or DC interface is not available on the 3921Plus modem The CC or DC activity is monitored on the SDU in the 3000 Series carrier Ports 3 or 4 are not available in the DTE Bridge mode Ports 2 3 and 4 are available in TDM MSD mode To access EIA LEDs from the Control branch make the following selections F1 Cont...

Page 77: ... is masked Make Busy Remove Make Busy The Make Busy function forces the modem off hook so it cannot answer a call This is often used with PBX systems to permit the busy out of a PBX port for rotary or hunt groups WARNING To prevent violations of FCC and DOC regulations this function must only be used behind a user s PBX To access Make Busy from the Control branch make the following selections F1 C...

Page 78: ...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 NIM installed in the same carrier you can permit eight multiport or sixteen singleport modems to share one service line The service line can also be extended to other carriers in a cabinet For more information on daisy chaining N...

Page 79: ...enting a Clone Remote operation the following is true The Clone Remote function only operates properly if the remote modems are connected to the local modem via a leased line or an established dial line network The Clone Remote will not appear on the LCD if the modem is not configured for leased lines and a dial line connection does not exist For more information on Clone Remote operation refer to...

Page 80: ...tion in Chapter 4 or a dial network connection using either V 34 family or V 32 family modulations refer to the Dial Line section in Chapter 4 The remote modem s Access From Remote configuration option is enabled refer to the Misc section in Chapter 4 The password Remote Access Password configuration option is the same in both the local and remote modems For an example of how to change the passwor...

Page 81: ... section in this chapter F1 Choose DLL Type DC_Broadcast F2 F3 From the Choose DLL Type screen press the key until DC_Broadcast appears Press F1 or F2 to transfer an exact copy of the tributary modem s firmware to the DC connected control modem s using the Active Poll list Proceed to the section titled Implementing a Clone Remote Operation which follows the descriptions of multipoint cloning opera...

Page 82: ...configuration option is enabled refer to the Misc section in Chapter 4 For Single download configurations know the remote access password and the network management address of the remote tributary modem that will receive the download Refer to the Misc section in Chapter 4 for a description of the remote access password RemAccssPasswrd configuration option and the network management address NetMngm...

Page 83: ...on 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 Choose Password Ent yyyyyyyy F2 F3 The password field yyyyyyyy displays the remote access password for the modem that will receive the download To increment digits within the password field yyyyyyyy use the and keys to position the cursor _ un...

Page 84: ...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 85: ...the Clone Remote process is interrupted disable the mux on the source modem before you initiate another Clone Remote process Be sure to re enable 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 wi...

Page 86: ...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 87: ...rator 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 minutes When the download completes the modem resets itself and displays a normal status message such as Idle 28 8 Reload ...

Page 88: ...following 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 configura...

Page 89: ... Refer to Table 3 8 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 sc...

Page 90: ...hreshold 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 the key Health and Status VF alarms are reported to the front panel LED and the Network Management System NMS based on the parameters in Table 3 8 Refer to Table 3 6 in the Device Health and Status section of this...

Page 91: ...errors or constant format errors By the process of elimination you can usually isolate the fault in your system There are six selections under Test Abort Self Self Test Loc Analog Loop Local 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 Loopb...

Page 92: ... 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 status message on the LCD To exit this function and remain in the Test branc...

Page 93: ... LCD cells and DCP status indicators 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 ...

Page 94: ...synchronous Direct mode to perform 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 3 4 Local Analog Loopback To access Loc Analog Loop from the Test branch make the following selections F...

Page 95: ...refer to the Test section in Chapter 4 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 Aysmmetric Rate configuration opti...

Page 96: ...t appear in Singleport mode F1 Test P1 Rem Loop Started F2 F3 The message Started appears on the LCD and the Test LED lights If OtherTestActive appears 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...

Page 97: ...this test 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 3 6 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 ...

Page 98: ... information on the Test Timeout configuration option refer to the Test section in Chapter 4 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 simulate dat...

Page 99: ... GN31 30 Figure 3 8 Pattern Test and Digital Loopback Test Figure 3 9 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 ...

Page 100: ...d Select Clear to reset 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 Patter...

Page 101: ... 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 28 8 Test SubHS F2 F3 Press the key until SubHS appears Select SubHS NOTE If there are no modems in the poll list the message Poll List Empty ap...

Page 102: ... Call Setup function is not available in TMp Control mode For dial backup applications the Call Setup branch of the Top Level menu allows you to dial disconnect 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 ...

Page 103: ...locations For leased backup applications Dial allows you to switch to the backup leased line Any valid non empty directory location may be used The remote modem cannot automatically answer the simulated call Use the Answer function of the remote modem in conjunction with the Dial function to manually switch to the backup leased line To access Dial from the Call Setup branch make the following sele...

Page 104: ...use this function when you want to disconnect an established call on a dial line For leased backup applications use this function to switch between the primary leased 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 ...

Page 105: ...odem 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 b...

Page 106: ...e 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 Dial Standby configuration option the dial backup network disconnected To access Dial Standby or Return to Dial from the Call Setup branch make the following selections F1 Call Setup Dia...

Page 107: ...he 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 is required that directory location 1 contain the telephone number used for dial backup To access Change Directory from the Call Setup branch make the following selections F1 Call Setup Change_Directory F2 F3 Press the key until Change_Dire...

Page 108: ...il a blank directory appears on the LCD The cursor _ always 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 3 9 for a li...

Page 109: ...etects 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 five seconds of silence after dialing the number If the silence is not detected the modem sends the NO ANSWER result code to the DTE or displays the No Quiet Answer LCD status message Hook flash Causes the modem to go on hook fo...

Page 110: ...om a directory location and reentering it into another directory location will not change the delayed or forbidden condition of this number Talk Data Branch The Talk Data function is not available in TMp Control mode The Talk Data branch of the Top Level menu allows you to switch the modem between Talk mode and Data mode when manually dialing using either the DCP or an externally attached telephon...

Page 111: ...11 If you are originating a call using a telephone and the remote modem is configured for Auto Answer perform the following procedure F1 Idle 28 8 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 28 8 Tlk Data F2 F3 When you hear this tone immediately sel...

Page 112: ...e 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 modems are online the status messages listed in Table 3 3 appear on the Top Level display It is not necessary to specify an originating or answering mod...

Page 113: ...est SubHS Call_Setup Tlk Data Security Choose Address TMp Control only Choose Password TMp only Not in TMp Trib Secondary Prim data blckd ExitRem appears instead of Remote when using Remote Mode The following conditions must be met before using the Remote branch A connection using either leased lines or the dial network must be established The Access from the Remote configuration option must be en...

Page 114: ... the error message No Trib Session appears when the function is executed To access the Remote branch make the following selections F1 Leased 28 8 Security Remote F2 F3 Press the key until Remote appears Select Remote NOTE If a connection is not established between a local 3900 Series modem and a remote 3900 Series modem the LCD displays Remote Mode Fail No Circuit Return to the Top Level menu For ...

Page 115: ...yyy 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 select the modem that will be accessed by the Remote function F1 Select Channel Secondary F2 F3 or F1 Select Channel Prim data blckd F2 F3 If operation over the secondary channel is desired press any function key to select the secondary channel Secondary channe...

Page 116: ...rimary 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 Remote branch access to fail The local modem is not able to communicate...

Page 117: ...le 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 ...

Page 118: ...e 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 currently used by the modem When the modem is powered on or when a save is performed the contents of Active S...

Page 119: ... you a head start and only require a minimum of changes to the default settings Factory default settings are listed in Appendix F Figure 4 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 RESET OR ON POWER UP A...

Page 120: ...ist 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 V...

Page 121: ... using 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...

Page 122: ..._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 123: ... 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 124: ... 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 are free to enter ...

Page 125: ...ode 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 configuration op...

Page 126: ...lay sec Multiport Mode V 42 MNP Buffer MUX MUX Mode TDM MSD DTE Bridge Tx Clock Source 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 Modem MSD 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 0 K Rate at 9600 Rate at 7200 Rate at 4800 Rate at 2400 Async Sync Async DTE...

Page 127: ... 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 and backup modems both on the FEP side Data receiv...

Page 128: ...e CT111 Rate Control Allows the DTEs to control modem rate via Pin 23 of the EIA 232 D interface This configuration option determines the effect of the DTE Rate control signals CT111 is also known as CH on the EIA 232 D interface Disable Disregards all CT111 Rate Control Fallback1 Forces the modem to decrease its configured data rate to the next lower data rate when any of the CT111 signals are OF...

Page 129: ...K Nxt Disable 24000 19200 16800 14400 12000 9600 7200 4800 2400 1200 Rate at 24 0K When the modem rate is 28 800 bps the port rate will be as selected by this configuration option Disable 24000 or 1200 The total for all ports cannot exceed the modem rate of 24 000 bps Rate at 19 2 K Nxt Disable 19200 16800 14400 12000 9600 7200 4800 2400 1200 Rate at 19 2K When the modem rate is 19 200 bps the por...

Page 130: ...nchronous mode or Synchronous mode Async DTE Rate Sync Nxt Sync 150 300 600 1800 This configuration option only appears when Async Sync Mode is configured for Async Asynchronous DTE Data Rate Identifies the asynchronous DTE s operating rate to the modem The asynchronous rate must be less than or equal to the synchronous port rate NOTE When using 150 300 or 600 bps line rates the port rate must be ...

Page 131: ... by all DTE ports This setting is ignored if the modem is commanded to disconnect from its own front panel or by the COMSPHERE 6700 Series Network Management System DSR Control Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR On_Early Delay_ToData Data Set Ready Control DSR is a signal from the modem to the DTE indicating the modem is connected and ready for operation Standard RS23...

Page 132: ...est to Send Antistreaming If enabled the operation of the antistreaming function is as follows If RTS is ON for a period exceeding the selected time the modem will take over control of the carrier and will force the carrier OFF The modem will also force CTS OFF during this time This condition will stay in effect until the DTE turns RTS OFF After this the next time the DTE turns RTS ON carrier will...

Page 133: ...ces LSD to be ON at all times Wink When Disconnect LSD is normally forced ON but can be turned OFF for 1 to 2 seconds upon a disconnect Follows DTR The state of LSD follows the state of DTR When DTR turns ON LSD turns ON When DTR turns OFF LSD turns OFF Simulated Control Carrier LSD follows the state of RTS of the remote DTE via the V 13 simulated control carrier signaling This is required for hos...

Page 134: ...cal loopback An Abort command or test time out ends this test Enable The DTE forces the modem into local loopback when the signal on Pin 18 CCITT 141 is turned ON Local loopback ends when the signal is dropped Disable The DTE will not initiate local loopback in response to the signal on Pin 18 Port TXC Source Internal End Internal External Port Transmit Clock Source Determines the clock source use...

Page 135: ... is set to Disable on a port of a tributary modem test mode is not propagated for that port and primary channel data is clamped when in test mode NOTE For an extended control modem this configuration option is used along with the upstream port number where the main primary channel is extended NOTE For an extended port using V 34 modulation only a single port rate is used for all the modem s line r...

Page 136: ...er Type Tone Nxt Tone Pulse Dialer Type Selects either tone DTMF dialing or pulse rotary dialing mode NOTE Pulse Mode is disabled in Denmark and in Sweden DialTone Detect Enable Nxt Enable Disable Dial Tone Detect Sets the modem for dial tone detection enable or blind dialing disable NOTE It may not be possible to disable Dial Tone Detect in some countries Enable Modem disconnects the call if a di...

Page 137: ...dem which may interpret the disconnection as an error instead of a valid disconnect Line Crnt Disc Enab 8msec Nxt Enab 8msec Enab 90msec Disable This configuration option does not appear on Models 3920 A1 401 and 3921 B1 001 Line Current Disconnect Determines the modem s response to short interruptions of line current The loss of line current is one method of disconnecting a call Enable 8 millisec...

Page 138: ...o Data Disconnect Forces the modem to disconnect if no data is transmitted and received within a specified amount of time NOTE The factory default value is country dependent Disable Modem remains connected despite the lack of data flow 10 30 60 min Modem disconnects if data is not received and transmitted within 10 minute 30 minute or 60 minute intervals Auto Make Busy Disable End Disable Enable T...

Page 139: ...s 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 33600 28800 V34 24000 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 4...

Page 140: ...andshaking sequence for both dial and 4 wire 2 wire leased line 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 V 32 terbo V 32bis or V 32 modulation Asymmetric Rate Disabled Nxt Enable Disable This configura...

Page 141: ...data rate and modulation scheme for operation on leased lines These modulation schemes are available on 2 wire or 4 wire lease 33600 28800 V 34 24000 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 operates using V 32...

Page 142: ...ion Auto Dial Back Disable Nxt Disable Enable FastBackup Automatic Dial Backup Allows the modem to dial the number stored in directory location 1 to restore communications with the remote modem when the leased lines fail NOTE This configuration option must be set to Disable for TMp Control operation NOTE In point to point applications this configuration option must be set to Enable in both the loc...

Page 143: ...is level either 26 dBm or 43 dBm LSD turns OFF When the carrier signal is greater than this level LSD turns ON Lease Lookback Disable Nxt Disable Enable Lease Lookback While operating on backup lines this configuration option allows the modem to test the primary 4 wire leased lines for connectivity by detecting line energy across the normal line bandwidth This test of the primary lines will not in...

Page 144: ... 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 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 loo...

Page 145: ...ition 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 settings Speaker V...

Page 146: ...this data to produce utilization reports Call Progress Only The modem transmits detailed modem status information to the NMS These messages include any events that can display on the LCD NOTE For 6800 Series NMS applications Disable must be selected NetworkPosition Tributary End Tributary Control Network Position Identification Each modem must be identified either as a control modem or a tributary...

Page 147: ...l that is connected to another modem DC or a control channel that is connected to a network management device CC NOTE 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 Link Delay sec 0 1 Nxt 0 1 2 5 10 20 50 Link Delay Seconds Controls the length...

Page 148: ...rranged into nine groups based on functionality DTE Interface Table 4 7 DTE Dialer Table 4 8 Line Dialer Table 4 9 Dial Line Table 4 10 Leased Line Table 4 11 V 42 MNP Buffer Table 4 12 Test Table 4 13 Misc Table 4 14 Security Chapter 6 The following graphic represents the structure of the configuration options in Singleport mode ...

Page 149: ...Mp Train Time TMp TxPreemphis Lease Lookback Dual_Leased_Ln BackupLine Check Test DTE RL CT140 DTE LL CT141 Test Timeout Rcv Remote Loop V54 Address V54 Device Type Misc StrapsWhenDisc Speaker Control Speaker Volume Access frm Remt RemAccssPasswrd Dir 1_Callback NMS_Call_Msgs NetworkPosition NetMngmtAddress Diag Connection Link Delay sec Singleport Mode V 42 MNP Buffer Security 495 14624 01 Dial M...

Page 150: ...s enabled and this configuration option 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 or Q1 Q2 Q3 Async DTE Rate 19200 Nxt 19200 57600 38400 28800 14400 12000 9600 7200 4800 2400 1200 0 300 This configuration option only a...

Page 151: ...The parity of the DTE must match the parity of the modem Parity options include None Even Odd Mark or Space None No parity bit is used Even Parity bit is set so that total number of 1 s in data bits plus parity bit is even Odd Parity bit is set so that total number of 1 s in data bits plus parity bit is odd Mark Parity bit is always set to 1 Only valid if Async Data Bits configuration option is se...

Page 152: ...ommand for Ignore is D0 The AT commands for Standard RS232 are D1 D2 or D3 The AT command for CntrlsOnHook is D4 The AT command for CntrlsTxMute is D5 DSR Control Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR On_Early Delay_ToData Data Set Ready Control DSR is a signal from the modem to the DTE indicating the modem is connected and ready for operation Standard RS232 Allows the m...

Page 153: ...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 on the VF line When RTS turns OFF carrier is not present This is only valid for V 29 and V 27bis leased line modulations Auto Dial Backup is always disabled for this setting The AT command for Standard RS232 is R0 The AT command for Ignore is R1 The A...

Page 154: ...lows 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 155: ...l Carrier DTR Disconnect OFF The state of LSD follows 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 AT T DATAKIT dial out applications NOTE If LSD Control is set to DTR DiscOff then the DTR Action configuration option must be set...

Page 156: ...back1 Fallback2 This configuration option does not appear when V 34 is enabled for a leased or dial line CT111 Rate Control Allows the DTE to control modem rate via Pin 23 of the EIA 232 D interface This configuration option determines the effect of the DTE Rate control signal CT111 is also known as CH on the EIA 232 D interface Disable Disregards CT111 Rate Control Fallback1 Forces the modem to d...

Page 157: ... to the modems downstream when test mode goes ON for that port Disable If this configuration option is set to Disable on a port of a tributary modem test mode is not propagated for that port and primary channel data is clamped when in test mode NOTE For an extended control modem this configuration option is used along with the upstream port number where the main primary channel is extended Upstrea...

Page 158: ...his framing protocol uses two synchronous control characters and a start of text control character before the text block and an end of text control character after the text block The correct character structure for V 25bis Bisync dialing is 7 data 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 D...

Page 159: ... 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 AT Co...

Page 160: ... for 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 5 1 in Chapter 5 AT Commands and S Regi...

Page 161: ...nd within that string will prevent the execution of subsequent valid commands No ERROR Operates similar to Normal mode however the modem does not issue an ERROR result code for invalid 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 execut...

Page 162: ...e modem responds to the DTE using the same idle fill The AT command is S Register S63 n where n is 0 for Mark or 1 for Flag V25b NewLineChr CR LF End CR LF CR LF This configuration option only appears when DTE Dialer is configured for V 25bis Async V 25bis New Line Character Sets the modem for the command line terminator used by the DTE in V 25bis Async mode The modem responds to the DTE using the...

Page 163: ... values may be restricted in some countries The AT command for Disable is S0 0 The AT command is S Register S0 n where n is a ring count from 1 to 255 Dialer Type Tone Nxt Tone Pulse Dialer Type Selects either tone DTMF dialing or pulse rotary dialing mode NOTE Pulse Mode is disabled in Denmark and Sweden The AT command for Tone is T The AT command for Pulse is P DialTone Detect Enable Nxt Enable ...

Page 164: ...ents Fast 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...

Page 165: ... carrier from the remote modem it disconnects the call This configuration option determines how long carrier is OFF before the modem disconnects Loss of carrier is one method of disconnecting a call 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 NOTE The range of allowable values...

Page 166: ...lled on the COMSPHERE 3000 Series Carrier Refer to the COMSPHERE 3000 Series Carrier Installation Manual The AT command is S Register S40 n where n is 0 for Disable and 1 for Enable MakeBusyVia DTR Disable End Disable Enable Make Busy Via DTR Determines if the modem goes off hook when DTR is OFF Enable this setting if the DTE normally keeps DTR ON and turns DTR OFF when the DTE cannot accept a cal...

Page 167: ... 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 31200 28800 V34 26400 V34 24000 V34 21600 V34 19200 V34 16800 V34 14400 V3...

Page 168: ... to the highest data rate the line can support This autorating only occurs between 19 200 bps and 4800 bps during V 32 V 32bis and V 32 terbo connections and 33 6 and 2400 bps for the V 34 family Start at 48 and Start at 96 Set the maximum connect rate for V 32 V 32bis and V 32 terbo connections The AT command is S Register S76 n where n is 0 for Enable 1 for Disable 2 for Start at 48 and 3 for St...

Page 169: ...lies handshaking sequence for both dial and 4 wire 2 wire leased line 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 ...

Page 170: ...on leased lines NOTE Certain changes to this configuration option will cause the modem to reset 33600 31200 28800 V34 26400 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 operates using V 32bis or...

Page 171: ...either 2 wire or 4 wire operation in Answer 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...

Page 172: ...TE In point to point applications this configuration option must be set to Enable in both the local and remote modem The answering modem must have its Auto Answer Ring Number configuration option enabled Refer to the Line Dialer configuration option group for information regarding Auto Answer NOTE When this configuration option is enabled the originating modem will attempt the dial backup for a ma...

Page 173: ...e 10min Nxt 10min 5min 1min Dial Standby Time Selects the amount of time that a dial circuit is held after returning to the leased lines CarrierOn Level 43dbm Nxt 43dbm 26dbm Carrier On Level Controls the carrier detection threshold for leased lines When the power level of the receive carrier signal drops 2 dBm below this level either 26 dBm or 43 dBm LSD turns OFF When the carrier signal is great...

Page 174: ...kback While operating on backup lines this configuration option allows the modem to test the primary 4 wire leased lines for connectivity by detecting line energy across the normal line bandwidth This test of the primary lines will not interrupt the data flow on the backup lines The configuration option settings must be the same at both ends Dual_Leased_Ln Disable End Disable Enable Dual Leased Li...

Page 175: ...42 Link Access Procedure for Modems LAPM protocol If this fails the modem attempts to connect in MNP mode If this fails the modem connects in Buffer mode 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...

Page 176: ...Mode 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 Disa...

Page 177: ...nfigured 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 chara...

Page 178: ...ed 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 over the VF line An XON...

Page 179: ...cally 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 modem tries to empty its buffers before disconnecting In both cases 10 sec and 60 sec the modem disconnects much sooner if it can empty its...

Page 180: ...echniques to enhance V 42 operation for cellular applications It is still compatible however with modems which do not have the cellular enhancement implemented or enabled The AT command is S Register S91 n where n is 0 for Disable and 1 for Enable RdcdAsyncBufSiz Disable End Disable Enable This configuration option only appears when Async Sync Mode is configured for Async and Error Control Mode is...

Page 181: ...ble The DTE does not initiate remote loopback in response to the signal on Pin 21 The AT command is S Register S51 n where n is 0 for Disable and 1 for Enable DTE LL CT141 Disable Nxt Disable Enable DTE Local Loopback Controls the use of Pin 18 of the EIA 232 D CCITT V 24 interface by the DTE to initiate a local loopback An Abort command or test time out ends this test Enable The DTE forces the mo...

Page 182: ... address of a modem that is to be placed into a loopback test This configuration option is used for more complex networks where multiple modems used in extended data circuits tail circuits can be commanded to loopback The AT command for Disable is S Register S53 0 The AT command for V 54 Address is S Register S53 n where n is a value from 1 to 34 V54 Device Type Peripheral End Peripheral Intermedi...

Page 183: ...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 AT W0...

Page 184: ...ation 1 Callback This configuration option controls whether or not the modem s single number callback function is used Disable Modem does not use the single number callback function Enable Modem answers a call disconnects and dials the number stored in directory location 1 NOTE This function is disabled if dial access security is enabled The AT Command to Disable is S Register S67 0 The AT Command...

Page 185: ...ues range from 001 to 256 NOTE Changes to this configuration option will cause the modem to reset Diag Connection Modem DC Nxt Modem DC NMS CC Disable This configuration option does not appear when the LeaseLine Rate is configured for TMp and the NetworkPosition is configured for Tributary Diagnostic Connection Allows the configuration of the serial diagnostic port of the modem to be either a diag...

Page 186: ...ion 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 5 1 for a listing of result codes Once the modems are online either by answering or originating a call they automatically switch to Data mo...

Page 187: ... 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 188: ...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 20 10 CONNECT 2400 EC Connection at 2400 bps with error control 21 11 CONNECT 4800 EC Connection at 4800 bps with error control Only appears when the Extended Result Cod...

Page 189: ...600 bps 43 43 CONNECT 21600 EC Connection at 21 600 bps with error control 44 44 CONNECT 24000 EC Connection at 24 000 bps with error control 45 45 CONNECT 26400 EC Connection at 26 400 bps with error control 46 46 CONNECT 28800 EC Connection at 28 800 bps with error control 47 47 CONNECT 31200 EC Connection at 31 200 bps with error control 48 48 CONNECT 33600 EC Connection at 33 600 bps with erro...

Page 190: ...sts the AT command The second column defines and lists all possible values for that command The Async Dial factory default is listed in bold The third column lists the key sequence used to enter the equivalent DCP command Use this to reference commands in Chapter 3 or Chapter 4 if further description is necessary AT Command Format AT commands are entered in Command mode using the following format ...

Page 191: ...ngth 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 Causes...

Page 192: ...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 the...

Page 193: ...CARRIER ERROR y p y 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 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 countri...

Page 194: ...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 195: ...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 L...

Page 196: ...de 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 operates in Synchronous mode using no AT Command protocol Configure Edit DTE Dialer The fo...

Page 197: ... 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 Act...

Page 198: ...0 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 ...

Page 199: ... Q4 XON XOFF Disable Q5 Disable XON XOFF Q6 Disable RTS to Mdm Configure Edit V42 MNP Buffer Tn No Data Disconnect Timer T0 Disable Tn Where 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 Whe...

Page 200: ...escription 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 Command mo...

Page 201: ...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 Blin...

Page 202: ...V 34 modulation on a leased line The factory setting is Enable Configure Edit Leased Line S18 Test Time out 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...

Page 203: ... 1200 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 32 terbo 21 16 800 V 32 terbo 22 33 600 23 31 200 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 28 800 V 34 Configure Edit Dia...

Page 204: ... 4800 V 27bis 17 2400 V 27bis 18 19 200 V 32 terbo 19 16 800 V 32 terbo 20 19 200 TMp 21 14 400 TMp 22 9600 TMp 23 7200 TMp 24 4800 TMp 25 2400 TMp 26 33 600 27 31 200 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 28 800 V 34 Configure Edit Leased Lin...

Page 205: ...On 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 determi...

Page 206: ...s Peripheral Configure Edit Tests S55 Access From Remote Register determines if a modem s DCP can be accessed by a remote modem Register 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 rem...

Page 207: ...ng 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 Character 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 ...

Page 208: ...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 C...

Page 209: ...g is used on dial lines when connected in V 32bis mode Register has the following values 0 Enable 1 Disable 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...

Page 210: ...ifteen frames For best performance this register should remain at its default setting of six frames ATS89 0 The only reason to change it is for satellite delays Register has the following values 0 six frames 1 seven frames 2 eight frames 3 nine frames 4 ten frames 5 eleven frames 6 twelve frames 7 thirteen frames 8 fourteen frames 9 fifteen frames The factory setting is 0 six frames This command o...

Page 211: ...s 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 Configure Edit Leased S94 V29 Link C...

Page 212: ...er 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 f...

Page 213: ...or viewing online because it contains security sensitive information Dial Access Security information is available in the COMSPHERE 392xPlus Modems Models 3920Plus and 3921Plus Installation and Operation Manual Document No 3920 A2 GN31 30 To order product documentation contact your sales representative 6 ...

Page 214: ...A 1 3920 A2 GN31 30 November 1996 Menu Tree Overview A 1 Overview Pages A 2 and A 3 provide a menu tree for the 392xPlus modems A ...

Page 215: ...TR DSR Tst TXD RXD RTS CTS Display Clear to next page SigQual RcvLevel Sig Noise NrEchLvl FarEchLv FarEchDel EchoFreqOff Phase Hts Impul Hts DropOuts Retrains Phas Jtr NonLinear FreqOffset Gain Hts Choose Function Edit StrapGroup Save Active Saved Customer1 Customer2 DTE_Interface Line_Dialer Leased_Line Test Security DTE_Dialer Dial_Line V42 MNP Buffer MIsc Singleport mode Async only MUX Copy Por...

Page 216: ...hen using Remote mode Self Rem_Digital_Loop Pattern Abort Loc_Analog_Loop Loc_Digital_Loop Set_Access_Ctrl Reset_Security Admin Password EditPassWdTable Set_Answer_Sec Set_Orig_Secur Set_Admin_PsWd 3921Plus only Speaker Reset EIA_LEDs Make_Busy or RemoveMakeBusy Download_Code DownloadSoftware Service_Line or DiscServiceLine Does not appear in TMp Control mode Does not appear in Remote mode Self Lo...

Page 217: ...le B 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 representati...

Page 218: ...ems are configured 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 ...

Page 219: ...ation option is enabled Refer to DTE Dialer in Chapter 4 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 4 Verify that the ...

Page 220: ...ate 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 4 The modem does not go off hook and begin dialing If using AT Dialing refer to Tab...

Page 221: ...elf 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 you are using the same method of flow control for ...

Page 222: ... 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 223: ... 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 224: ...Plus 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 225: ...6 3920 A2 GN31 30 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 226: ...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 227: ...er 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 228: ...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 CCITT 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 229: ...n the request directory location CRS is similar 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 Failu...

Page 230: ...DTE if the modem is not currently allowed 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 C...

Page 231: ...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 232: ...cation 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 LSN is a res...

Page 233: ... 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 C...

Page 234: ...nse 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 CONNECT List R...

Page 235: ...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 236: ...L 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 237: ... 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 238: ...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 239: ...figuration 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 4 F ...

Page 240: ...Ports 2 3 4 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 33600 Port1 or Disable Ports 2 3 4 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 33600 Port1 or Disable Ports 2 3 4 A ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 33600 Port1 or Disable Ports 2 3 4 A ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 33600 Port1 or Disable Ports 2 3 4 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Rate at 28 8 K ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 28800 Port1 or Disable Ports 2 3 4 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 28800 Port1 or Disable Ports 2 3 4 Á...

Page 241: ... 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 ÁÁÁÁÁ...

Page 242: ... 1 ÁÁÁÁÁ ÁÁÁÁÁ 1 ÁÁÁÁÁÁ ÁÁÁÁÁÁ 1 ÁÁÁÁÁ ÁÁÁÁÁ 1 A ÁÁÁÁÁÁ ÁÁÁÁÁÁ 1 A ÁÁÁÁÁ ÁÁÁÁÁ 1 DTE Interface Singleport mode ÁÁÁÁÁÁ ÁÁÁÁÁÁ Async Sync Mode ÁÁÁÁÁÁ ÁÁÁÁÁÁ Sync ÁÁÁÁÁ ÁÁÁÁÁ Async ÁÁÁÁÁÁ ÁÁÁÁÁÁ Sync ÁÁÁÁÁ ÁÁÁÁÁ Async ÁÁÁÁÁÁ ÁÁÁÁÁÁ Async ÁÁÁÁÁ ÁÁÁÁÁ Sync ÁÁÁÁÁÁ ÁÁÁÁÁÁ Async DTE RateÁÁÁÁÁÁ ÁÁÁÁÁÁ 19200 ÁÁÁÁÁ ÁÁÁÁÁ 19200 ÁÁÁÁÁÁ ÁÁÁÁÁÁ 19200 ÁÁÁÁÁ ÁÁÁÁÁ 19200 ÁÁÁÁÁÁ ÁÁÁÁÁÁ 19200 ÁÁÁÁÁ ÁÁÁÁÁ 19200 ÁÁÁÁÁÁ...

Page 243: ...ÁÁÁÁ ÁÁÁÁÁÁ AT ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Disable ÁÁÁÁÁÁ ÁÁÁÁÁÁ AT Escape CharÁÁÁÁÁÁ ÁÁÁÁÁÁ 043 F ÁÁÁÁÁ ÁÁÁÁÁ 043 F ÁÁÁÁÁÁ ÁÁÁÁÁÁ 043 F ÁÁÁÁÁ ÁÁÁÁÁ 043 ÁÁÁÁÁÁ ÁÁÁÁÁÁ 043 ÁÁÁÁÁ ÁÁÁÁÁ 043 F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Escape Guard Time ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 1 sec F ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 1 sec F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 1 sec F ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 1 sec ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 1 sec ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 1 sec F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ...

Page 244: ...Á ÁÁÁÁÁ 2 ÁÁÁÁÁÁ ÁÁÁÁÁÁ 2 ÁÁÁÁÁ ÁÁÁÁÁ 2 ÁÁÁÁÁÁ ÁÁÁÁÁÁ Busy Tone Detect ÁÁÁÁÁÁ ÁÁÁÁÁÁ Enable ÁÁÁÁÁ ÁÁÁÁÁ Enable ÁÁÁÁÁÁ ÁÁÁÁÁÁ Enable ÁÁÁÁÁ ÁÁÁÁÁ Enable ÁÁÁÁÁÁ ÁÁÁÁÁÁ Enable ÁÁÁÁÁ ÁÁÁÁÁ Enable ÁÁÁÁÁÁ ÁÁÁÁÁÁ Pause Time ÁÁÁÁÁÁ ÁÁÁÁÁÁ 2 sec ÁÁÁÁÁ ÁÁÁÁÁ 2 sec ÁÁÁÁÁÁ ÁÁÁÁÁÁ 2 sec ÁÁÁÁÁ ÁÁÁÁÁ 2 sec ÁÁÁÁÁÁ ÁÁÁÁÁÁ 2 sec ÁÁÁÁÁ ÁÁÁÁÁ 2 sec ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ No Answer Timeout ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 45 sec ÁÁÁ...

Page 245: ...ÁÁÁ ÁÁÁÁÁÁ 28800 V34 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 28800 V34 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 19200 control or 14400 trib ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 28800 V34 F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 28800 V34 F ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 28800 V34 F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Leased Mode ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 4 wire Ans or 4 wire Orig ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 4 wire Ans or 4 wire Orig ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 4 wire Orig trib or 4 wire Ans contro...

Page 246: ... Point To PointÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Point To Point ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Point To Point F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Point To Point F ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Point To Point F ÁÁÁÁÁÁ ÁÁÁÁÁÁ TMp Train Time ÁÁÁÁÁÁ ÁÁÁÁÁÁ 50 F ÁÁÁÁÁ ÁÁÁÁÁ 50 F ÁÁÁÁÁÁ ÁÁÁÁÁÁ 50 ÁÁÁÁÁ ÁÁÁÁÁ 50 F ÁÁÁÁÁÁ ÁÁÁÁÁÁ 50 F ÁÁÁÁÁ ÁÁÁÁÁ 50 F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ TMp Tx Preemphasis ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Enable F ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Enable F ÁÁÁÁÁÁ ÁÁ...

Page 247: ...Modem ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ XON XOFF Passthrough F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Disable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Disable ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Disable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Disable ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Disable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Disable ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Modem to Modem Flow Control F ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Disable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Disable ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Disable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Disable ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Dis...

Page 248: ...ÁÁÁÁÁÁ Access from Remote J ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Enable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Enable ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Enable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Enable ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Enable ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ Enable ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Remote Access Password J ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 00000000 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 00000000 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 00000000 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 00000000 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 00000000 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 00000...

Page 249: ...ÁÁ 013 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ DTE Password Backspace Character ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 008 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 008 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 008 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 008 ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ 008 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ 008 ÁÁÁÁÁÁ ÁÁÁÁÁÁ Get User Id ÁÁÁÁÁÁ ÁÁÁÁÁÁ Disable ÁÁÁÁÁ ÁÁÁÁÁ Disable ÁÁÁÁÁÁ ÁÁÁÁÁÁ Disable ÁÁÁÁÁ ÁÁÁÁÁ Disable ÁÁÁÁÁÁ ÁÁÁÁÁÁ Disable ÁÁÁÁÁ ÁÁÁÁÁ Disable ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ NMS Reporting J ÁÁÁÁÁÁ ÁÁ...

Page 250: ...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 251: ...Cable 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 th...

Page 252: ...ÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 9 6K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 7 2K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 4 8K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 2 4K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ...

Page 253: ...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 254: ...ÁÁÁÁ 9600 ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 12 0K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 9 6K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 7 2K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 4 8K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ Á...

Page 255: ... 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 Exte...

Page 256: ...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 8K ÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁ ÁÁÁ 4800 ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 24 0K ÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ 4800 ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 19 2K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁ...

Page 257: ... 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 for 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 Cabl...

Page 258: ...ÁÁ ÁÁÁ 14 4K ÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 12 0K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 9 6K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 7 2K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 4 8K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disa...

Page 259: ...Plus 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 exception Rate Refer to the Sample Port Rate Table in this section Diag Connection Set to NMS CC NetworkPo...

Page 260: ...ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 7 2K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 4 8K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 2 4K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable Cables Cable 1 Use a standard customer supplied EIA 232 D V 24 cable with a DB 25 P plug c...

Page 261: ...ment 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 3920Plus 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 Management...

Page 262: ...Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 12 0K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 9 6K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ 7 2K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ 4800 ÁÁÁ ÁÁÁ ÁÁÁ 4 8K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ...

Page 263: ...ics Configuration Options 3920Plus A Use Sync Leased Answer default configuration options with the following exception 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 exception Tx Clock Source Set to RXC Diag Connection Set to Modem DC Port Tx Source Set Port 1 to External ...

Page 264: ...A 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 p...

Page 265: ...ge 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 Tx Clock Source Set to Port 1 LSD Control Set to Sim_Cntl_Car DTR Action Set to Ignore 3910Plus D Use Sync Dial template default configuration options with the following exceptions NetworkPosition Set to Control D...

Page 266: ...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 267: ... exception 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 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 At...

Page 268: ...ÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ 2 4K ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ Disable Sample Port Rate Table Point to Point MSD 3920Plus B Port Rate Port 1 Port 2 Port 3 Port 4 ÁÁÁ ÁÁÁ ÁÁÁ 28 8K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 19200 ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ Disable ÁÁÁ ÁÁÁ ÁÁÁ Disable ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 9600 ÁÁÁ ÁÁÁ ÁÁÁ 24 0K ÁÁÁÁ ÁÁÁÁ ÁÁÁÁ 14400 ÁÁ...

Page 269: ...ipoint MSD 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 Control Template default configuration options with the following exception MSD Control Set Ports 1 2 3 and 4 to Enable ...

Page 270: ...er 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 271: ...on 4 wire modular cord 7 foot length 125 0067 0031 8 position 8 wire modular cord 14 foot length 125 0053 1431 Universal Power Supply 327 0074 XXXX 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 125 0053 1431 871A Adapter 002 0026 0031 H ...

Page 272: ...tibility between 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 ...

Page 273: ...mission 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 at which bits are transmitted across a data connection broadcast A method of transmission The simultaneous transmission to ...

Page 274: ...am 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 Customer 1 A user defined configuration area containing customized configuration options for a specific application Customer 2 A user defined configuration area containing customized configuration options for a specific a...

Page 275: ...cations circuit that is established by a switched circuit connection in the dial network dial network See PSTN Dial Standby A function available when the modem is operating in Dial Backup mode allowing the modem to switch back to lease line operation while still maintaining the dial line connection dial string A series of characters that consists of numbers and modifiers used to dial a telephone n...

Page 276: ...command fallback Retraining at a lower rate or speed FCC Federal Communications Commission Board of Commissioners that regulates all interstate and foreign electrical communication systems that originate from the United States FEC Forward Error Correction A method of error control for data transmission where the receiving device can detect and correct a character or block of code containing a pred...

Page 277: ...Any test that verifies a device s integrity by connecting the device s output to the device s input then checking the received signal for errors menu tree The structure containing the menu hierarchy starting at a Top Level menu and extending down to various modem functions mixed inbound rates In a multipoint network several different data rates from tributary modems transmitters communicating with...

Page 278: ... connects private telephones to each other and to the public dial network permissive interface A dial modem operating mode characterized by a fixed output power level of 9 dBm phase jitter A rapid or repeated shifting of the relative phase of a signal resulting in unwanted distortion physical address The diagnostic address of a control modem derived from its location in the carrier its carrier and...

Page 279: ...ntrol up to 8 carriers with a total of 128 modems SDU Shared Diagnostic Unit A circuit card that plugs into a dedicated slot in the COMSPHERE 3000 Series Carrier to provide the SDCP and network management interfaces to the modems in the carrier It translates the network management protocol to the devices in the carrier and routes incoming messages to the appropriate slots secondary channel A data ...

Page 280: ...onnected closer to the host computer USOC Universal Service Ordering Codes V 22 A CCITT standard for modems operating full duplex over dial networks at 1200 bps V 22bis A CCITT standard for modems operating full duplex over leased lines or dial networks at 2400 bps V 27bis A CCITT standard for modems operating over leased lines at 2400 or 4800 bps V 29 A CCITT standard for modems operating over le...

Page 281: ...rt of the audio frequency range used to transmit voice sound usually 300 Hz to 3400 Hz This band is used by the modem for its modulated signal XOFF A character that tells the DTE or modem to stop transmitting data XON A character that tells the DTE or modem to start or resume transmitting data ...

Page 282: ...2 automatic rate control 4 24 4 54 B back panel connectors 2 4 backup dial 2 5 2 6 3 41 3 42 3 65 3 68 3 69 B 2 leased 1 9 1 10 2 5 2 6 3 65 status 3 26 Bell 103J 4 50 212A 4 50 Bisync 4 41 D 1 busy control 3 40 3 41 C cables 2 4 2 5 2 6 connecting 2 3 Call Setup branch 3 10 3 65 3 73 Canadian government requirements 1 12 carrier mounted multiport modem 1 2 singleport modem 1 2 Clone Remote 3 42 3...

Page 283: ...s group 4 41 DTE Interface configuration options group 4 10 4 33 dual leased line operation See backup leased E EIA 232 D cable connection 2 4 2 6 B 3 pin assignments C 2 status 3 3 3 6 3 24 end to end pattern test 3 62 environment 1 13 equipment customer supplied 2 2 list 2 1 2 2 error control 4 58 escape character 4 42 5 2 5 16 F faceplate 1 5 1 6 3 3 factory default configurations 2 11 4 2 F 2 ...

Page 284: ...odem 1 2 1 7 model 3921Plus 1 4 MUX mode 1 7 1 9 4 10 DTE Bridge 4 10 mux disabled 1 7 mux enabled 1 7 TDM MSD 1 9 4 10 N network interface module NIM 2 2 3 41 network management address 3 31 4 29 4 68 network management system connection 2 6 O operating modes AT commands 5 1 Talk Data 3 10 3 73 3 75 operational messages 3 11 3 16 Options Status branch 3 28 options strap See configuration options ...

Page 285: ...Ds 3 3 3 6 straps See configuration options SubHS Sub Network Health and Status branch 3 10 3 64 3 65 synchronous operation 2 11 4 2 4 13 4 33 T Talk Data branch 3 10 3 73 3 75 telephone external 3 73 C 4 TDM MSD 1 2 1 7 1 10 4 10 technical specifications 1 13 1 14 telephone external 3 73 C 4 telephone numbers display 3 66 storage 3 71 Test branch 3 10 3 54 3 63 Abort 3 55 Local Analog Loopback 3 ...

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