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3830-A2-GB91-30

August 1998

Troubleshooting

Overview

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Overview

This appendix points out basic problems that can occur when operating
a 3830 modem. Use Tables A-1 through A-5 to check out these
problems. If you are having data communication difficulties, such as
periodic character loss, random errors, or constant format errors, use
the loopback tests associated with the &T command. With these tests
you can usually isolate the fault in your system by using the process of
elimination. If problems continue to occur, contact your service
representative.

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Summary of Contents for COMSPHERE 3830

Page 1: ...COMSPHERE 3800 SERIES MODEMS MODEL 3830 USER S GUIDE Document No 3830 A2 GB91 30 August 1998 ...

Page 2: ...ion is protected by federal copyright law No part of this publication may be copied or distributed transmitted transcribed stored in a retrieval system or translated into any human or computer language in any form or by any means electronic mechanical magnetic manual or otherwise or disclosed to third parties without the express written permission of Paradyne Corporation 8545 126th Avenue North P ...

Page 3: ...of the following methods Via the Internet Visit the Paradyne World Wide Web site at http www paradyne com Via Telephone Call our automated call system to receive current information via fax or to speak with a company representative Within the U S A call 1 800 870 2221 Outside the U S A call 1 727 530 2340 Trademarks All products and services mentioned herein are the trademarks service marks regist...

Page 4: ...ine another method of grounding the equipment 3 Slots and openings in the cabinet are provided for ventilation To ensure reliable operation of the product and to protect it from overheating these slots and openings must not be blocked or covered 4 Do not allow anything to rest on the power cord and do not locate the product where persons will walk on the power cord 5 Do not attempt to service this...

Page 5: ...tion if the equipment is to be used with telecommunications circuits take the following precautions Never install telephone wiring during a lightning storm Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface Use caution ...

Page 6: ...COMSPHERE 3800 Series Modems Model 3830 E August 1998 3830 A2 GB91 30 Notices ...

Page 7: ...y 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 determine the maximum RENs for the calling ar...

Page 8: ...tion of this manual for more information 8 This equipment cannot be used on public coin service provided by the telephone company Connection to Party Line Service is subject to state tariffs Contact the state public utility commission public service commission or corporation commission for information 9 The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a compute...

Page 9: ...mpliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment Users...

Page 10: ...ion on a loop may consist of any combination of devices subject only to the requirement that the total of the Load Numbers of all devices does not exceed 100 If your equipment is in need of repair refer to the procedure in the Government Requirements and Equipment Return section ...

Page 11: ...l 3830 Modem Installation Overview 2 1 Model 3830 Modem Package 2 1 Model 3830 Installation 2 2 DTE Connection 2 4 Dial Line Connection 2 4 2 Wire Leased Line Connection 2 5 Telephone Connection 2 5 AC Power Transformer Connection 2 5 Communications Software Installation 2 6 Modem Power Up 2 6 Selecting Factory Configuration Options 2 7 Recovering AT Commands 2 9 Initialization Strings 2 11 3 Fax ...

Page 12: ... Command Set and S Registers Overview 4 1 Operating Modes 4 1 Command Guidelines 4 3 AT Command List 4 6 S Register List 4 30 Appendices A Troubleshooting A 1 B Technical Specifications B 1 C Pin Assignments C 1 D ITU T V 25 bis Dialing Commands and Response D 1 Glossary Index ...

Page 13: ...able of Contents iii 3830 A2 GB91 30 August 1998 List of Figures Figures Page 1 1 Model 3830 Front Panel 1 3 2 1 Model 3830 Rear Panel 2 3 C 1 Wiring Diagram 8 Position to 6 Position Conversion Cable C 4 ...

Page 14: ...mands 4 7 4 3 Model 3830 S Registers 4 30 A 1 Modem Health A 2 A 2 Modem DTE Connection A 3 A 3 Modem VF Connection A 4 A 4 Online Operation A 7 A 5 Leased Line Operation A 8 B 1 Model 3830 Technical Specifications B 1 C 1 EIA 232 D Pin Assignments C 1 C 2 VF Connector Pin Assignments for Leased Lines C 5 D 1 V 25bis Commands D 8 D 2 V 25bis Response Messages D 9 ...

Page 15: ...ng factory configuration options recovering the ability to use AT commands and using AT command initialization strings Chapter 3 provides general information about fax modem operation Chapter 4 provides instructions for displaying and changing AT commands and S Registers These commands control all aspects of the modem s operation Appendix A provides instructions for performing diagnostic tests whe...

Page 16: ...ributor directly for any help needed For additional information concerning warranty sales service repair installation documentation training distributor locations or Paradyne worldwide office locations use one of the following methods Via the Internet Visit the Paradyne World Wide Web site at http www paradyne com Via Telephone Call our automated call system to receive current information via fax ...

Page 17: ... data compression and ITU T V 42 MNP error correction In addition to fast line speeds the modem can send data to the DTE at speeds as high as 115 200 bps The Model 3830 modem is extremely versatile when used in modem pooling environments it allows multiple users to temporarily customize settings in the Model 3830 thereby permitting communication with the calling modem Upon disconnection the Model ...

Page 18: ... Convenient migration to new or optional features through software downloading ITU T V 42bis and MNP Class 5 data compression Virtual error free data integrity with ITU T V 42 and MNP Level 4 error control Asynchronous dial DTE data rates from 300 bps 115 200 bps A unique Paradyne modem pooling feature that preserves the answering modem s permanent configuration but allows multiple users to tempor...

Page 19: ...iguration areas COMSPHERE Model 3830 Modem Front Panel and Status Indicators The front panel of the Model 3830 modem is equipped with a speaker and 13 LEDs Light Emitting Diode status indicators that monitor modem activity Figure 1 1 PWR ALRM CTS TXD LSD RXD EC RATE 105 106 103 109 108 COMSPHERE 3830 496 14007 01 SQ RTS DTR 104 OH AT Figure 1 1 Model 3830 Front Panel Status Indicators LEDs The Mod...

Page 20: ...urned ON DTR or the modem has forced DTR ON RTS 105 green Request to Send The DTE has data to send to the modem CTS 106 green Clear to Send The modem is ready to receive data from the DTE TXD 103 green Transmit Data The modem is receiving data from the DTE to transmit LSD 109 green Line Signal Detect The modem has detected a valid carrier signal and is capable of transferring data to the DTE RXD 1...

Page 21: ...d for OFF The modem is connected at its configured data rate AT yellow AT Command Set ON The AT command set is disabled OFF The AT command set is enabled Slow Flash The modem will not respond to all AT commands due to the setting of the AT Command Mode configuration option see S84 in Chapter 4 Or the modem has been configured to reload settings from Active Saved to Active Operating upon a disconne...

Page 22: ...COMSPHERE 3800 Series Modems Model 3830 1 6 August 1998 3830 A2 GB91 30 ...

Page 23: ... AT Commands 2 9 Initialization Strings 2 11 V 25bis Applications 2 11 Synchronous Leased Line Applications 2 12 AT T Exclusive Dialing for DATAKIT Applications 2 12 Overview This chapter describes how to connect both provided and customer supplied cables to the modem In addition it describes how to recover AT commands when the modem is in Dumb mode and how to enter initialization strings for uniq...

Page 24: ... with an IEC 320 connector and appropriate wall plug if using the 220 240V power transformer One of the following modular dial or leased network interfaces RJ11C for dial permissive applications JM8 for leased line applications only Model 3830 Installation Before installing your standalone modem make sure your installation site is clean and well ventilated Allow space around the modem for installi...

Page 25: ...30 A2 GB91 30 August 1998 An 8 pin modular keyed jack for external telephone set use only An 8 pin modular keyed jack for dial PSTN lines or 2 wire leased lines A 25 pin DB 25 S receptacle for DTE interface Figure 2 1 Model 3830 Rear Panel ...

Page 26: ...er to tighten the cable to the DTE To ensure compliance with FCC Part 15 Regulations a ferrite choke must be installed on the EIA 232 D interface cable 1 Open the ferrite choke place it around the DTE cable as close as possible to the connector attached to the modem and snap the ferrite choke shut 2 Install a cable tie behind the ferrite choke to prevent it from sliding along the cable Dial Line C...

Page 27: ...he modem to a telephone 1 Insert the 6 position 4 conductor modular plug into the jack labeled PHONE 2 Insert the other end of the modular cord into the telephone AC Power Transformer Connection Use the following procedures to connect the modem to an ac power outlet 1 Make sure the modem s power switch is in the Off position 2 Insert the power transformer s 5 pin DIN male connector into the modem ...

Page 28: ...n directly send AT commands The Model 3830 can be used with any major communications software Refer to your software s user s guide for installation procedures For an overview of how to use AT commands and a list of AT commands supported by the Model 3830 refer to Chapter 4 AT Command Set and S Registers Modem Power Up Once your modem is properly connected to the DTE dial or leased lines and ac ou...

Page 29: ...ration then you must change the factory setting as described as follows The purpose of having preset configurations is so that you can have a head start in getting your modem operating and reducing the amount of time required to configure your modem NOTE If you have already changed certain configuration options you may have lost AT command control For example operating in Synchronous mode or disab...

Page 30: ...aved 1 for Customer 1 2 for Customer 2 F5 and F6 are available only if Enhanced Throughput Cellular ETC is installed NOTE These three configuration areas are nonvolatile memory locations Active Saved contains the most recently saved changes to any configuration options In the event of power loss the modem retrieves these configuration options Customer 1 and Customer 2 are user defined configuratio...

Page 31: ...g configuration options The DTE Dialer Type configuration option M and Q is set to AT The Async Sync Mode configuration option M and Q is set to Async The DSR Control configuration option S is set to Forced On The LSD Control configuration option C is set to Forced On If these settings are not appropriate then change them to a setting compatible with your current application The procedures for an ...

Page 32: ...s PRESS Enter The screen displays OK The modem is now in AT Recovery mode and remains in this state until a Save or power reset occurs While in this mode you can use AT commands to make any necessary changes to configuration options Keep in mind that the C command is changed to Forced On C0 the M and Q commands are changed to Async mode with AT commands enabled M0 and Q0 and the S command is chang...

Page 33: ...ed somewhere in the middle of the initialization string Whenever an L command is used it must appear at the end of an initialization string V 25bis Applications For V 25bis HDLC dial line operation create an initialization string with the following commands Note that the character format can be 8 data bits no parity and 1 stop bit 7 data bits odd parity and 1 stop bit or 7 data bits even parity an...

Page 34: ... TYPE AT F D1 S1 S44 n S45 n S82 n M1 Ln W Where n is the value for the AT command Refer to either Table 4 2 or Table 4 3 in Chapter 4 to determine the best possible values for these commands PRESS Enter AT T Exclusive Dialing for DATAKIT Applications For AT T exclusive dialing for DATAKITt applications create an initialization string with the following commands TYPE AT F C5 D1 S3 R0 D3 Q1 G1 S85 ...

Page 35: ...it to send and receive fax files in communication with another fax modem or with a standard fax machine These fax files are images turned into the sort of data that can be stored in your computer Fax machines and fax modems use special protocols different from those used by standard modems The device you intend to communicate with must be compatible with your modem which means that it must be capa...

Page 36: ...tandard EIA 232 D operation Use the AT D2 command LSD Line Signal Detect Control should be set for standard EIA 232 D operation Use the AT C1 command Data should be buffered during Error Control EC negotiation Use the AT C1 command If your fax software requires that you change the configuration of your modem see the appropriate sections of Chapter 4 AT Commands and S Registers Your fax software us...

Page 37: ...mand mode and Data mode Before a modem goes online establishes a successful connection with a remote modem it is 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 4 1 for a listing of result codes Once the modems are online either by an...

Page 38: ... escape sequence To change this value refer to S Register S2 discussed later in Table 4 3 in the S Register List section To prevent the modem from interpreting an embedded in data as an escape sequence the Escape Guard Time value determines the idle time required before and after the escape sequence is issued The Model 3830 uses a 1 second pause as the Escape Guard Time To change this value refer ...

Page 39: ...ds can be entered one at a time or in strings Strings can have up to 40 characters after the AT prefix You can use spaces hyphens and parentheses as fillers to make the commands easier to read the modem ignores these fillers and they are not counted among the characters which make up the command string Commands must be entered on one line and end with the carriage return character Enter key Some c...

Page 40: ...ect answer tone 4 4 ERROR Invalid command 5 5 CONNECT 1200 Connection at 1200 bps 6 6 NO DIALTONE No dial tone detected 7 7 BUSY Busy or trunk busy signal detected 8 8 NO ANSWER No quiet answer 10 10 CONNECT 2400 Connection at 2400 bps 11 11 CONNECT 4800 Connection at 4800 bps 12 12 CONNECT 9600 Connection at 9600 bps 13 16 CONNECT 12000 Connection at 12 000 bps 14 13 CONNECT 14400 Connection at 1...

Page 41: ...nection at 14 400 bps with error control 25 17 CONNECT 16800 EC Connection at 16 800 bps with error control 26 15 CONNECT 7200 EC Connection at 7200 bps with error control 27 5 CONNECT 1200 EC Connection at 1200 bps with error control 28 28 CONNECT 38400 Connection at 38 400 bps 29 14 CONNECT 19200 EC Connection at 19 200 bps with error control Appears when the Extended Result Codes configuration ...

Page 42: ...data rate instead of the line rate AT Command List AT commands are issued from an asynchronous DTE such as a PC and control the modem s operation and software configuration AT commands are only applicable when the DTE Dialer Type configuration option is set for AT See Mn and Qn commands AT commands are entered while the modem is in Command mode and use the following format TYPE ATXn Where X is the...

Page 43: ... a power up self test Refer to the Recovering AT Commands section in Chapter 2 for procedures and guidelines on this command A Repeat Last Command Executes again the last command string Not to be preceded with AT or followed by pressing the Enter key A Answer Mode Allows the modem to go off hook and attempts to establish a connection without waiting for a ring B ITU T Bell Mode Determines the prot...

Page 44: ...A B C or D can be dialed as tone P Pulse dial Only the digits 0 9 can be dialed in Pulse Dial mode NOTE Once a dialing method tone or pulse has been specified it will remain active only until the end of that dial string The factory setting is Tone dial Pause Causes the modem to pause before processing the next character in the dial string The length of this pause is determined by the value held in...

Page 45: ...lt to the DTE Hook flash This causes the modem to go on hook for 0 5 seconds then return to off hook Return to Command mode Modem returns to Command mode after dialing a number without disconnecting the call This is useful when the number exceeds 40 characters or when the wait time between parts of a dial string is unknown Space and These characters are ignored by the dial string and can be includ...

Page 46: ...ou to change the value displayed by I0 I10 0 causes I0 to display 144 default I10 1 causes I0 to display 240 I10 2 causes I0 to display 480 I10 3 causes I0 to display 960 I10 4 causes I0 to display 120 I11 Displays the program memory checksum I17 Displays the last sequence fault record I19 Displays the entire firmware revision number Ln Speaker Volume L0 Selects low volume L1 Selects low volume L2...

Page 47: ... applications Sn r Change S Register Changes the contents of an S Register where n is the S Register and r is the new value Sn Display S Register Displays the value of an S Register where n is the S Register number T Tone Dial Sets the modem for Tone DTMF dial mode See D command Vn Result Codes Format Controls whether or not result codes appear as words or as numeric codes Some DTEs do not recogni...

Page 48: ...CODE Informational messages such as VF line connect rate and Error Control are displayed with the result codes Disable Displays basic result codes OK CONNECT RING NO CARRIER and ERROR Enable Displays basic result codes in addition to the CONNECT rate message for example CONNECT 14400 Add EC If error control is negotiated attaches the EC suffix to the CONNECT rate message Add V42 MNP Attaches the V...

Page 49: ...emote modem when it goes on hook Issuing a long space is one method of disconnecting a call Y0 Disable Ignores long space Y1 Enable Disconnects if long space is detected Enables transmission of a long space Zn Reset and Load Active Z0 Loads configuration options from Active Saved to Active Operating Z1 Loads configuration options from Customer 1 to Active Operating Z2 Loads configuration from Cust...

Page 50: ...connecting C3 Follows DTR State of LSD follows state of DTR C4 Simulated Control Carrier State of LSD follows state of remote modem s RTS via V 13 simulated control carrier signaling Note that the remote modem s RTS Action configuration option must be set to Simulated Control Carrier C5 DTR Disconnect Off State of LSD follows state of DTR except upon a disconnect where LSD always turns Off DTR mus...

Page 51: ...ches off D2 Standard EIA 232 DTR Signal is controlled by the DTE D3 Off Reload Strap Follows Standard EIA 232 operation except that when DTR switches Off the modem loads the Active Saved area into the Active Operating area D4 Controls On Hook Follows Standard EIA 232 operation except that modem does not disconnect until DTR is lowered by the DTE Fn Select Factory Default Configuration Options Load...

Page 52: ...Disconnect S10 100 V 32bis Train S43 1 V 32bis Autorate S76 3 V 42 ARQ Window Size S89 9 Cellular Enhancements S91 1 If ETC is installed and your modem is attached to a normal dial telephone line but sometimes communicates with a modem that is attached to a cellular phone use the F6 command F6 Cellular PSTN sets the following configuration options AT Command Option Value Transmit Level I100 Error ...

Page 53: ...1 0 specification Use only with remote modems set to I99 and limit the data rate to 4800 bps S41 5 I100 Valid only if ETC is installed Dial Transmit Level is automatically adjusted according to the ETC1 1 specification Set by F6 Jn Dial Transmit Type Sets the power output level of the transmit signal over dial lines Jn overrides the In command J0 Permissive 9 dBm Ln Leased Mode Sets the modem for ...

Page 54: ... commands and Hayes AutoSync enabled NOTE There is no M4 command M231 Q231 Modem operates in Asynchronous data mode and disables any type of AT command dialing protocol M232 Q232 Modem operates in Asynchronous data mode and uses V 25bis asynchronous dialing M233 Q233 Modem operates in Synchronous data mode and uses V 25bis bisynchronous dialing M234 Q234 Modem operates in Synchronous data mode and...

Page 55: ... Standard EIA 232 DTE controls RTS to the modem in normal EIA 232 D operation RTS must be ON for the DTE to transmit to the modem R1 Ignores RTS Modem assumes RTS is always ON Use this selection when the DTE does not provide RTS to the modem R2 Simulated Control Carrier RTS input controls the remote modem s LSD signal This is used for DTEs that require Line Signal Detect LSD to toggle ON and Off t...

Page 56: ...ive S2 Wink When Disconnect DSR is normally forced ON but is turned Off for 1 to 2 seconds upon a disconnect S3 Follows DTR When the modem receives DTR from the DTE it sends DSR to the DTE S4 On Early DSR is low when the modem is in the idle state DSR goes high immediately upon a command to enter Data mode This setting is required for some modem pooling applications S5 Delay to DTE Operation is si...

Page 57: ...se configuration option T5 Disables Receive Remote Loopback Response configuration option T6 Remote Digital Loopback test T7 Remote Digital Loopback with Pattern T8 Local Loopback with Pattern T9 Self Test To start a test set the S18 register to a desired test duration in seconds for example 30 seconds and then issue the T command Test results display as the number of errors sent or received over ...

Page 58: ...options V3 Customer 2 configuration options V4 Directory locations 1 10 Wn Write Save to Memory Saves the current configuration options in Active Operating to one of three configuration areas W0 Saved to Active Save W1 Saved to Customer 1 W2 Saved to Customer 2 Xn Transmit Clock Source Determines the source of timing for synchronous data transmitted from the DTE X0 Internal Modem provides transmit...

Page 59: ...his way For example the command AT Z1 5551234 stores the telephone number 555 1234 into directory location 1 To clear a telephone number from a memory location issue the Zn command without entering a telephone number An Maximum Frame Size Sets the maximum frame size for V 42 and MNP For V 42 128 is the maximum value if a larger value is specified it will default to 128 For MNP the minimum value is...

Page 60: ...iation Dn CTS Control Clear to Send CTS is a signal from the modem to the DTE indicating that it can accept data from the DTE D0 Forced On Forces CTS to always ON D1 Standard EIA 232 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 Gn Modem to Modem Flow Control If a modem s buffers begin to fill due to data it ...

Page 61: ...t Disable K2 Keep Data Break First Enable K3 Keep Data Break First Disable K4 Keep Data Data First Enable K5 Keep Data Data First Disable K6 Discard Break Not Applic Disable BREAK BUFFER CONTROL Determines if data stored in the modem s buffer is saved or discarded when the DTE issues a break sequence SEND BREAK CONTROL Determines what is sent from the modem first data or break if a break sequence ...

Page 62: ... until a disconnect occurs N0 Buffer Mode N1 Direct Mode N2 MNP or Disconnect N3 MNP or Buffer N4 V 42 MNP or Disconnect N5 V 42 MNP or Buffer F5 and F6 Cellular set this to N4 The Qn command controls two configuration options simultaneously Flow Control Flow Control of DTE of Modem Q0 Disable Disable Q1 XON XOFF XON XOFF Q2 CTS to DTE Disable Q3 CTS to DTE RTS to Modem Q4 XON XOFF Disable Q5 Disa...

Page 63: ...trol characters received from the local DTE will be passed on to the remote modem If configured for modem to modem flow control see G Modem to Modem Flow Control this configuration option determines if flow control characters received from the line will be passed on to the DTE X0 Disable X1 Enable An Error Control Fallback Character This configuration option allows you to enter the ASCII value of ...

Page 64: ...32 maximum rate 4800 bps B2400 V 22bis maximum rate 2400 bps B1200 V 22 or Bell 212A maximum rate 1200 bps B300 V 21 or Bell 103 maximum rate 300 bps Modulation and Data Rate can also be set using S register S41 The following table shows the equivalent values of S41 for each Bn value and where applicable Bn in combination with Bn S41 20 B19200 V 32terbo 19 200 bps S41 21 B16800 V 32terbo 16 800 bp...

Page 65: ...nd line Setting the DTE rate with the R command does not turn off autobauding R115200 Sets the DTE rate to 115 200 bps R76800 Sets the DTE rate to 76 800 bps R57600 Sets the DTE rate to 57 600 bps R38400 Sets the DTE rate to 38 400 bps R19200 Sets the DTE rate to 19 200 bps R14400 Sets the DTE rate to 14 400 bps R9600 Sets the DTE rate to 9600 bps R7200 Sets the DTE rate to 7200 bps R4800 Sets the...

Page 66: ... the register number PRESS Enter To modify the value of an S Register issue the following command TYPE ATSn r Where n is the register number and r is the new value PRESS Enter Table 4 3 lists all S Registers supported by the Model 3830 Table 4 3 1 of 20 Model 3830 S Registers S0 Auto Answer Ring Number Determines the number of rings the modem will count before automatically answering a call Enter ...

Page 67: ...e carriage return Enter key This character is used to end command lines and result codes Enter a value from 0 to 127 for the command end character Factory setting is 13 ASCII carriage return NOTE The W command used to save this change must be on a separate line This ensures both that the change is intentional and that the DTE can enter the new character S4 Line Feed Character Determines ASCII valu...

Page 68: ...econds the modem pauses when it encounters a comma in the Dial command string Enter a value from 0 255 seconds Factory setting is 2 seconds S10 No Carrier Disconnect Determines how long in tenths of seconds the modem allows the carrier signal to be Off before disconnecting the call Enter a value from 0 254 in 0 1 second increments A value of 255 disables this register Factory setting is 20 2 secon...

Page 69: ...ster Factory setting is Disable 0 S26 RTS to CTS Delay Sets the length of time in 10 millisecond increments the modem waits after receiving RTS before issuing CTS to the DTE Enter a value from 0 255 Factory setting is 0 milliseconds S34 1800 Hz Training Tone This configuration option is for communication with certain modems that do not comply with the V 32 standard When 1800 Hz Training Tone is en...

Page 70: ...nate options Register has the following values 0 Use Directory Location 1 1 Use Directory Locations 1 2 2 Use Directory Locations 1 3 3 Use Directory Locations 1 4 S S S S S S 9 Use Directory Locations 1 10 NOTE The modem must be in Originate mode to perform an automatic dial backup S36 Rate Auto Originate Initiates a dial backup call using the phone number in directory location 1 when the leased ...

Page 71: ... values 0 Use Directory Location 1 1 Use Directory Locations 1 2 2 Use Directory Locations 1 3 3 Use Directory Locations 1 4 D D D D D D 9 Use Directory Locations 1 10 NOTE The modem must be in Originate mode to perform an automatic dial backup S38 DTR Cont Repeat Determines whether automatic dialing of dial backup directory locations will be repeated continuously or halted after the first pass Re...

Page 72: ...s a line disconnect Register has the following values 0 Disable Immediate disconnect 1 1 second 2 2 seconds D D D D 255 255 seconds S41 Dial Line Rate Determines the modem s highest data rate and modulation scheme for operation on dial lines Register has the following values 1 14 400 V 32bis 2 12 000 V 32bis 3 9600 V 32bis V 32 4 7200 V 32bis 5 4800 V 32bis V 32 6 2400 V 22bis 7 1200 V 22 8 1200 2...

Page 73: ...ng S44 Leased Line Rate Determines the modem s highest data rate and modulation scheme for operation on 2 wire leased lines in either Answer or Originate mode Register has the following values 0 14 400 V 32bis 1 14 400 V 32bis 2 12 000 V 32bis 3 9600 V 32bis 4 7200 V 32bis 5 4800 V 32bis 6 2400 V 22bis 18 19 200 V 32terbo 19 16 800 V 32terbo Factory setting is 19 200 V 32terbo S45 Leased Line Tran...

Page 74: ...lowing values 0 Disable 1 30 seconds 2 20 seconds 3 60 seconds 4 90 seconds 5 120 seconds S S S S 21 600 seconds Factory setting is Disable Note that the S46 2 command has an effect that is out of sequence with the other values S47 Auto Dial Standby Register determines if the modem performs an automatic dial standby if in Dial Backup mode Register has the following values 0 Disable 1 15 minutes 2 ...

Page 75: ...ffer Disconnect Delay Determines the maximum amount of time the modem can continue to send data in its Transmit Buffer to the remote modem after it is commanded by the DTE to disconnect Register has the following values 0 Disable Immediate disconnect 1 1 second 2 2 seconds D D D D 255 255 seconds Factory default is 10 seconds S51 DTE Remote Loopback CT140 Determines if the modem performs a remote ...

Page 76: ...le 1 34 Modem address Factory setting is Disable S54 V 54 Device Type Identifies where the modem is physically located in the network Register has the following values 0 Peripheral 1 Intermediate Factory setting is Peripheral S55 Access from Remote Determines whether the 3830 modem s configuration options can be accessed by a remote 3800 Series modem via a dial line or leased line connection 0 Ena...

Page 77: ...e Access Password Register allows entry of the fourth pair rightmost of digits of a remote access password Any value from 00 to 99 is valid For example if the remote access password is 12345678 then S59 78 S61 CT111 Rate Control Determines if CT111 Rate is disabled set for Fallback 1 or Fallback 2 CT111 Rate allows the DTE to control modem rate via Pin 23 of the EIA 232 D interface This configurat...

Page 78: ...y setting is ASCII S63 V 25bis Idle Character 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 Factory setting is Mark S64 V 25bis New Line Character Identifies to the modem the type of line terminator used by the DTE while in V 25bis mode Register has the following values 0 Carriage Return and Line Feed 1 Carriage ...

Page 79: ... Enable 8msec S66 NMS Call Messages Register determines if the modem sends information regarding status Call Progress and or sends summarized call statistics Call Connect to the network management system COMSPHERE 6700 Series NMS Register has the following values 0 Call Connect Progress 1 Disable 2 Call Connect Only 3 Call Progress Only Factory setting is Call Connect Progress S67 Directory Locati...

Page 80: ...he following values 0 Tributary 1 Control Factory setting is Tributary S75 Network Management Address Register determines the modem s network address This address is used when accessing the modem from the NMS Enter a value from 0 network address 001 to 255 network address 256 Factory setting is 255 S76 V 32bis Autorate Dial Line Determines if the Autorate function is used on dial lines when connec...

Page 81: ...0 Disable 1 Enable S78 V 32bis Automode Dial Line If enabled automode permits the modem to automatically connect to a remote modem using any supported modulation scheme If disabled the modem only supports the modulation scheme selected by the S41 register Dial Line Rate If the modem is in a modem pool attached to a System 85 Private Branch Exchange PBX S78 should be set to 2 This modifies paramete...

Page 82: ...al Quality Retrain Forces the modem to retrain if the SQ Signal Quality LED is on for more than the specified number of seconds 1 5 SQ Retrain reduces the amount of bad data sent to the DTE when no error control is used but greatly increases the likelihood of retrains on impaired lines SQ Retrain affects only V 32 and V 32bis modulations Register has the following values 0 Disable 1 5 Number of se...

Page 83: ... issues an ERROR message 2 No Strap or ERROR The modem ignores all configuration commands but always issues an OK response message Factory setting is Normal S85 Fast Disconnect Allows the modem to disconnect immediately after receiving a disconnect command from a local DTE or its own diagnostic control panel Register has the following values 0 Disable 1 Enable Factory setting is Disable S88 Straps...

Page 84: ...rames to accommodate satellite delays Register has the following values 0 6 frames default 1 7 frames 2 8 frames 3 9 frames D D D D 9 15 frames This command applies only to connections made using V 42bis data compression or V 42 error control Factory setting is 6 frames S90 DTE Rate VF Rate Register forces the DTE computer data rate to be equal to the VF telephone line data rate Register has the f...

Page 85: ...rmance over a cellular link Should be enabled when the remote modem is using a cellular connection Register has the following values 0 Disable 1 Enable Factory setting is Disable F5 and F6 set S91 to Enable S93 RJ11 Cellular Adapt Valid only if Enhanced Throughput Cellular ETC is installed Register controls support for an RJ11 connection including generation of the ETC 1 1 Calling Tone during call...

Page 86: ...COMSPHERE 3800 Series Modems Model 3830 4 50 August 1998 3830 A2 GB91 30 ...

Page 87: ... A 5 to check out these problems If you are having data communication difficulties such as periodic character loss random errors or constant format errors use the loopback tests associated with the T command With these tests you can usually isolate the fault in your system by using the process of elimination If problems continue to occur contact your service representative A ...

Page 88: ...former is connected to the ac power receptacle If the Power LED does not operate contact your customer service representative A problem is suspected after the power up self test Perform a self test using the AT T9 command Perform a local analog loopback with a Pattern test If the modem consistently registers errors contact your customer service errors contact your customer service representative I...

Page 89: ...nc Dial factory configuration area to guarantee that all configuration options are returned to their proper setting Refer to the Recovering AT Commands section in Chapter 2 Make sure that all AT commands are terminated with a carriage return Verify that the DTE has a valid character format Valid format consists of 8 data bits with no parity or 7 data bits with even odd mark or space parity Verify ...

Page 90: ...t configuration option S Register 0 is set to a value other than 0 disable Verify that the DTE is providing DTR to the modem If the DTE does not provide DTR to the modem verify that the modem s D command DTR Action configuration option is set for Ignore D0 Verify that all cables are attached to the correct connectors on the rear of the modem Modem goes off hook answers but does not connect Perform...

Page 91: ...option is set to the correct setting either AT DTR Dialing V 25bis Async V 25bis Bisync or V 25bis HDLC Modem does not go off hook and begin dialing If using AT Dialing refer to the Table A 2 Modem DTE Connection g dialing If using DTR Dialing verify the telephone number stored in directory location 1 and verify that the DTE is raising DTR from Off to ON to initiate a dial If using V 25bis Async v...

Page 92: ... or Pulse dialing is needed Verify if one modem is configured for Error Control or Disconnect and the other modem is configured for no Error Control Try calling in Buffer mode If both modems use V 32bis or V 32 modulation set the modem s V 32bis Train configuration option to Long Intermittent disconnects high error rates or excessive retransmissions Use the T7 command to perform a remote digital l...

Page 93: ...ation High error rates occur when running a local loopback or self test Incoming rings can cause data errors during a loopback test Abort the test disconnect the modular VF cord and restart the test Table A 4 Online Operation Symptom Action Data scrambled or unreadable Verify that the character format data bits parity and stop bits is set to the same value in both modems Missing data during a tran...

Page 94: ...sed Line Operation Symptom Action Modems do not train up on leased lines Verify that the correct cabling is used for your application Refer to Chapter 2 for modem installation instructions Verify that one modem is configured for Answer mode and the other is configured for Originate mode ...

Page 95: ...al specifications for the Model 3830 modem Table B 1 1 of 4 Model 3830 Technical Specifications Specifications Description APPROVALS 115 Vac 60 Hz only FCC Part 15 FCC Part 68 UL CSA DOC CS 02 and CS 03 Class A Registration Number See label on modem Listed to UL 1950 Certified to CSA C22 2 No 950 Certification Number See label on modem B ...

Page 96: ...l 103J 300 bps LEASED LINE MODULATIONS V 32terbo 19 200 16 800 bps ITU T V 32bis 14 400 12 000 9600 7200 4800 bps ITU T V 32 9600 4800 bps FAX MODULATIONS Optional ITU T V 17 14 400 12 000 9600 7200 bps ITU T V 29 9600 7200 bps ITU T V 27 ter 4800 2400 bps ENVIRONMENT Operating Temperature Relative Humidity Shock and Vibration Storage Temperature 32 F 0 C to 122 F 50 C 5 to 90 noncondensing Withst...

Page 97: ... including power transformer 2 1 inches 5 4 cm 7 6 inches 19 4 cm 12 1 inches 30 8 cm TRANSMIT LEVEL Dial Line Leased Line Permissive 9 dBm or 10 through 32 dBm in 1 dBm increments 0 through 15 dBm in 1 dBm decrements TELEPHONE INTERFACE Dial Line Connectivity Leased Line Connectivity RJ11C Permissive 6 pin center pair leased jack For JM8 connection refer to Appendix C for JM8 conversion cable pin...

Page 98: ...ions Specifications Description DATA RATES Dial Line Leased Line Fax DTE 19 200 16 800 14 400 12 000 9600 7200 4800 2400 1200 or 300 0 bps 19 200 16 800 14 400 12 000 9600 7200 or 4800 bps 14 400 12 000 9600 7200 4800 or 2400 bps 115 200 300 bps ERROR CONTROL ITU T V 42 MNP 4 2 DATA COMPRESSION ITU T V 42bis MNP Class 5 ...

Page 99: ... assignments for the modem Table C 1 1 of 3 EIA 232 D Pin Assignments RS 232 Pin Name EIA Circuit CCITT Signal Source Circuit Function 1 AA 101 Shield 2 TXD BA 103 DTE Transmit Data 3 RXD BB 104 DCE Receive Data 4 RTS CA 105 DTE Request to Send 5 CTS CB 106 DCE Clear to Send 6 DSR CC 107 DCE Data Set Ready 7 SG AB 102 Signal Ground 8 LSD CF 109 DCE Line Signal detect C ...

Page 100: ...to drive one RS 232 load 10 10V 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 18 CT141 LL 141 DTE Local Loopback 20 DTR CD 108 DTE Data Terminal Ready 21 CT140 ...

Page 101: ...ed for connecting data equipment to nonswitched private line networks specifically the service equivalents of the pre divestiture Series 3002 Category II Tariff 260 service There is a substantial difference in 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 Bellco...

Page 102: ...used for Tip and Ring when in Dial mode To connect the modem to a standard JM8 leased line jack a conversion cable 125 0054 1531 must be used Note that for 2 wire leased line operation the yellow and black leads are not used The wiring of this cable is illustrated in Figure C 1 Figure C 1 Wiring Diagram 8 Position to 6 Position Conversion Cable ...

Page 103: ...6 pin 8 pin Model 3830 Phone Connector J6 Model 3830 Line Connector J7 JM8 6 pin Center Pair Leased 1 Ring 1 Not Used 1 2 Tip 1 Not Used 2 3 Mode Indication Loopback Indication Tip 1 3 4 Phone Ring 2 wire leased line Dial Ring Not Used Ring 4 5 Phone Tip 2 wire leased line Dial Tip Not Used Tip 5 6 Mode Indication Common Loopback Indication Ring 1 6 7 Program Resistor Tip Not Used 8 Program Resist...

Page 104: ...COMSPHERE 3800 Series Modems Model 3830 C 6 August 1998 3830 A2 GB91 30 ...

Page 105: ...esponse LSN D 6 Command Response D 7 Valid VAL D 7 Invalid INV D 7 Overview ITU T V 25bis is an international dialing protocol that permits direct and stored number dialing using DTEs in either Asynchronous Bisynchronous or HDLC operating mode The Model 3830 modem supports V 25bis request and answer commands that initiate and cancel dialing program commands that allow you to create and enter telep...

Page 106: ...synchronous Dialing mode is 7 data bits even parity and 1 stop bit The character format for Bisynchronous Dialing mode is 7 data bits odd parity and 1 stop bit The character format for HDLC Dialing mode can be 8 data bits no parity and 1 stop bit 7 data bits odd parity and 1 stop bit or 7 data bits even parity and 1 stop bit Character format is determined by the DTE The modem detects this format w...

Page 107: ...al Wait for Dial Tone or User Defined Pause Flash Hook or Delimiters Call Request with Stored Memory Address Provided CRS The CRS command dials the telephone number stored in the request directory location CRS is similar to the ATDS command The CRS command format is CRSx Where x is directory location 1 10 The modem responds to the command with either a VAL valid or INV invalid response followed by...

Page 108: ...y Signal and Trunk Busy and the result code BUSY NS is similar to the Common Operational Message Invalid Number and the result code ERROR CB is similar to the Call Failure Messages Dial Line in Use and No Dial Test and the result code ERROR RT is similar to the Call Failure Message No Answer Tone and the result code NO CARRIER AB is similar to the Call Failure Messages No Dial Tone and No Dial DTR...

Page 109: ...prevents the modem from answering an incoming call This command is only valid once the DTE receives an incoming call INC response from the modem A DIC must be issued within 5 seconds after receiving an INC The DIC command format is DIC If DIC is issued within 5 seconds the modem sends the VAL response to the DTE If DIC is issued after 5 seconds INV is returned Connect Incoming Call CIC The CIC com...

Page 110: ...If the RLN command is entered without specifying a directory location then all directory locations and telephone numbers are displayed If a directory location is entered then only that telephone number is displayed The RLN command format is RLN which displays all directory locations or RLNx Where x is a directory location List Stored Number Response LSN LSN is a response to an RLN command issued b...

Page 111: ...es that the modem has accepted the V 25bis command issued by the DTE VAL is similar to the AT result code OK Invalid INV The INV response indicates that the modem has received an incorrect 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 ...

Page 112: ... S Register Equivalent CALL REQUEST COMMANDS CRN Call Request with Number Provided ATD CRS Call Request with Memory Address ATDS CALL ANSWER COMMANDS INC Incoming Call Indication RING DIC Disregard Incoming Call NONE CIC Connect Incoming Call ATA PROGRAM COMMAND PRN Program Normal AT Z LIST REQUEST RLN Request to List Stored Number NONE ...

Page 113: ...el 3830 modem 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 RESPONSE LSN List Stored Number NONE COMMAND RESPONSE VAL Valid Command OK INV Invalid Command ERROR ...

Page 114: ...COMSPHERE 3800 Series Modems Model 3830 D 10 August 1998 3830 A2 GB91 30 ...

Page 115: ...ries continuously Answer mode The modem is in a state where it is ready to receive an incoming call For example an ATA Answer command has been issued to place the modem into online answer mode The modem has been forced off hook and is generating an answer tone beginning the handshaking process with the calling modem ASCII This code American Standard Code for Information Interchange is a 7 bit code...

Page 116: ...the asynchronous DTE data rate when using AT commands automatic answer A capability to respond to a call received over a dial line baud A unit of signaling speed that is equal to the number of symbols per second This is not necessarily the same as bits per second although the terms are frequently interchanged Bisync Binary Synchronous Communications An IBMr communications protocol that has become ...

Page 117: ...ax modem standard Under Class 2 the modem handles most of the protocol compression and conversion tasks as well as modulation leaving the computer free for other work command line Contains the command s instructing the modem to perform a function Command lines begin with the AT prefix unless disabled and are executed when you press the Return key Command mode One of two general modem operating mod...

Page 118: ...a is received Data mode One of two general modem operating modes When in Data mode the modem transmits and receives data instead of accepting commands DB 25 connector A 25 pin connector that is used to connect a cable which enables communications between two devices dBm A decibel referenced to one milliwatt This unit measures relative signal power DCE The equipment Data Communications Equipment or...

Page 119: ...ware from a locally attached PC to a modem or allows the cloning of firmware from a local modem to a remote modem Also the process of moving data from a host computer to an attached computer DTE The equipment Data Terminal Equipment such as a computer or terminal that provides data in the form of digital signals EIA Electronic Industries Association This organization provides standards for the dat...

Page 120: ...ther fax modem fax software A program or system of programs installed on a computer that allow a fax modem to send and receive facsimile images FCC Federal Communications Commission Board of Commissioners that regulates all interstate and foreign electrical communication systems that originate from the United States full duplex Simultaneous two way communications Group III A fax standard that spec...

Page 121: ...ndard for modems operating full duplex with asynchronous or synchronous data at 1200 or 2400 bps over the dial network PSTN ITU T V 25 bis A dialing protocol that permits direct and stored number dialing in asynchronous bisynchronous or HDLC modes ITU T V 27 ter A fax communications standard for modems operating half duplex with synchronous data at 2400 and 4800 bps ITU T V 29 A fax communications...

Page 122: ...signal is looped to its receiver long space disconnect A disconnect can occur if the modem receives an extended space from a remote modem for example when a remote modem is commanded to disconnect it transmits a continuous space to the modem before disconnecting loopback test Any test that verifies a device s integrity by connecting the device s output of one direction to the device s input of the...

Page 123: ... Private Branch Exchange dedicated to one customer A PBX 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 It is one of two possible modes of operation for modems connected to dial lines see programmable interface power up self test A test that checks most hardware component...

Page 124: ...them result code An asynchronous message in either numbers or words that the modem sends to the DTE after executing or trying to execute a command RJ11 A type of 6 position jack normally used with permissive dial networks and telephone sets rotary A TELCO service whereby multiple lines to a customer premise share a common telephone number S Registers Registers that contains information affecting t...

Page 125: ...UNIX Dial A factory preset configuration area containing the configuration options most often used in a UNIXr dial network USOC Universal Service Ordering Codes VF Voice Frequency The part 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 ...

Page 126: ...COMSPHERE 3800 Series Modems Model 3830 Glossary 12 August 1998 3830 A2 GB91 30 ...

Page 127: ...34 4Ć33 220 240V power transformer 2Ć2 2Ć5 A Repeat Last Command 4Ć7 ac power 2Ć5 Answer mode ATA 4Ć7 Async Sync Mode AT M 4Ć18 AT commands H V 42bis Compression 4Ć29 C LSD Control 4Ć14 D DTR Action 4Ć15 F Factory Defaults 4Ć15 G V 22 bis Guard Tone 4Ć16 I Dial Transmit Level 4Ć17 J Dial Transmit Type 4Ć17 L Leased Mode 4Ć17 M Async Sync Mode and DTE Dialer Type 4Ć18 ...

Page 128: ... Modem Flow Control 4Ć24 K Break Buffer Control Send Break Control Break Forces Escape 4Ć25 N Error Control Mode 4Ć26 Q Flow Control of DTE and Modem 4Ć26 T No Data Disconnect Timer 4Ć27 X XON XOFF Passthrough Flow Control 4Ć27 A Answer Mode 4Ć7 D Dial 4Ć8 DS Dial Stored Number 4Ć9 E Command Echo 4Ć9 H Hook Switch Control 4Ć9 I Identification 4Ć10 L Speaker Volume 4Ć10 M Speaker On Off 4Ć10 O Onli...

Page 129: ... 4Ć44 S82 Leased Line 4Ć46 Bad Lines Auto Originate S46 4Ć38 Bell Mode 4Ć7 blind dial pause S6 4Ć32 blind dialing 4Ć12 Break Buffer Control AT K 4Ć25 Break Forces Escape AT K 4Ć25 busy tone detect ATX 4Ć12 Call Answer commands V 25bis DĆ5 Call Request commands V 25bis DĆ2 Call Response V 25bis DĆ3 Call Waiting 4Ć8 cellular enhancements F5 and F6 commands 4Ć15 S91 Register 4Ć49 cellular transmit le...

Page 130: ...onfiguration options factory default 2Ć7 factory defaults AT F 4Ć15 loading ATZ 4Ć13 loading when disconnected S88 4Ć47 saving AT W 4Ć22 selecting 2Ć7 viewing AT V 4Ć22 connect problems AĆ4 AĆ6 CT111 Rate Control S61 4Ć41 CTS Control D 4Ć24 Data mode 4Ć1 data rate B command 4Ć28 DATAKIT applications 2Ć12 4Ć18 Dial ATD 4Ć8 dial command modifiers 4Ć8 Dial Line Rate S41 4Ć36 Dial Stored Number ATDS 4...

Page 131: ... set to VF rate 4Ć48 DTE rate in result codes 4Ć12 DTR Alarm Reporting S77 4Ć45 make busy via S69 4Ć44 DTR Action AT D 4Ć15 echo command 4Ć9 EIAĆ232ĆD cable 2Ć2 EIAĆ232ĆD pin assignments CĆ1 Enhanced Throughput Cellular F factory defaults 4Ć15 Dial Transmit Level 4Ć17 S91 Cellular Enhancements 4Ć49 S93 RJ11 Cellular Adapt 4Ć49 equipment provided by customer 2Ć2 equipment supplied 2Ć1 Error Control...

Page 132: ...isconnect 4Ć47 fax Class 2 3Ć1 EIA TIAĆ592 standard 3Ć1 operation 3Ć1 software settings 3Ć2 features 1Ć2 ferrite choke on DTE cable 2Ć4 on power transformer cable 2Ć6 firmware revision number 4Ć10 flow control AT Q command 4Ć26 DTE to modem 4Ć26 modem to DTE 4Ć26 modem to modem 4Ć24 problems AĆ7 frame size A 4Ć23 front panel 1Ć3 hang up ATH 4Ć9 Hayes AutoSync 4Ć18 hook flash 4Ć9 Hook Switch Contro...

Page 133: ...eased Line Carrier On Level S48 4Ć39 Leased Line Rate 4Ć37 Leased Line Signal Quality Retrain S81 4Ć46 Leased Line Transmit Level S45 4Ć37 Leased Mode AT L 4Ć17 leasedĆline connection 2Ć5 leasedĆline problems AĆ8 LEDs front panel 1Ć3 Line Current Disconect S65 4Ć43 load Active Operating area 4Ć13 LSD Control AT C 4Ć14 MNP5 Data Compression AT C 4Ć29 Model 3830 modem commands 4Ć6 description 1Ć1 fe...

Page 134: ... Network Management Address S75 4Ć44 Network Position Identification S74 4Ć44 NMS COMSPHERE 6700 Series NMS 1Ć2 NMS Call Messages S66 4Ć43 No Carrier Disconnect S10 4Ć32 No Data Disconnect Trigger Signal 4Ć46 operating modes 4Ć1 P Pulse dial 4Ć8 password Remote Access 4Ć40 4Ć41 pin assignments RSĆ232 CĆ1 VF connector CĆ3 Power LED AĆ2 powerĆup procedure 2Ć6 quiet answer 4Ć9 ...

Page 135: ...Result Code Control ATQ 4Ć11 result codes 4Ć4 extended 4Ć12 Result Codes Format ATV 4Ć11 retrain S81 4Ć46 return to command mode 4Ć9 return to Online mode ATO 4Ć10 ring number S0 4Ć30 RTS Action R 4Ć19 RTSĆtoĆCTS Delay S26 4Ć33 S Registers changing 4Ć11 displaying 4Ć11 list of 4Ć30 S0 AutoĆAnswer RIng Number 4Ć30 S10 No Carrier Disconnect 4Ć32 S12 Escape Guard Time 4Ć32 S18 Test Timeout 4Ć33 S2 Es...

Page 136: ...39 S52 DTE Local Loopback 4Ć40 S53 V 54 Address 4Ć40 S54 V 54 Device Type 4Ć40 S55 Access from Remote 4Ć40 S56 S59 Remote Access Password 4Ć40 4Ć41 S6 Blind Dial Pause 4Ć32 S61 CT111 Rate Control 4Ć41 S62 V 25bis Coding 4Ć42 S63 V 25bis Idle Character 4Ć42 S64 V 25bis New Line Character 4Ć42 S65 Line Current Disconnect 4Ć43 S66 NMS Call Messages 4Ć43 S67 Directory Location 1 Callback 4Ć43 S69 Make...

Page 137: ...ontrol AT K 4Ć25 serial number 4Ć10 speaker on off 4Ć10 speaker volume 4Ć10 status indicators 1Ć3 stop test AT T0 4Ć21 Straps When Disconnected S88 4Ć47 synchronous leasedĆline applications 2Ć12 T Tone dial 4Ć8 technical specifications BĆ1 telephone connection 2Ć5 telephone directory AT Z 4Ć23 Test Timeout S18 4Ć33 tests AT T 4Ć21 timeout for no answer S7 4Ć32 transmit level AT I 4Ć17 transmit typ...

Page 138: ...bis New Line Character 4Ć42 V 29 Train On Data S92 4Ć49 V 32bis Automode S78 4Ć45 V 32bis Autorate Dial Line 4Ć44 V 32bis Autorate Leased Line 4Ć46 V 32bis Train S43 4Ć37 V 32terbo 1Ć1 V 42 ARQ Window Size S89 4Ć48 V 42bis Compression AT H 4Ć29 V 54 Address S53 4Ć40 V 54 Device Type S54 4Ć40 VF connector pin assignments CĆ3 VF Rate 4Ć36 4Ć37 W Wait for dial tone 4Ć8 XON XOFF 4Ć26 XON XOFF Passthro...

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