Table A-2, Modem ± DTE Connection | Paradyne 3830 guide

A. Troubleshooting

	Table A-2
Modem ± DTE Connection

Symptom	Action

Modem does not accept	Verify that the cable between the Async port of
or echo back AT	the DTE and the modem is a standard
commands	EIA-232 cable. If the cable is bad, replace it.
	(Null modem cables, also known as crossover
	cables, do not work in this application.)
	Reload the Async Dial factory configuration
	Reload the Async 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 that the DTE's data rate is set to a level
	supported by the modem (115,200 bps±
	300 bps).
	If using a PC, verify that the modem is
	attached to the correct communications port.

3830-A2-GB91-30

August 1998

A-3

Image 89

Paradyne 3830 manual Table A-2, Modem ± DTE Connection

Contents

Comsphere 3800 Series Modems Model Series Modems Model Comsphere Trademarks Warranty, Sales, and Service Information Important Safety Instructions Safety Instructions F FC FC F CCC C FC CC FC C C United States Government Requirements and Equipment Return Comsphere 3800 Series Modems ± Model Canada Switched Telephone Network Comsphere 3800 Series Modems ± Model Table of Contents Appendices AT Command Set and S-Registers Figures List of Figures Tables List of Tables Objectives and Reader Assumptions How to Use this ManualPreface Related Documents Overview Introduction Features Model 3830 Front Panel Status Indicators LEDs Label Color Indicates Model 3830 LEDs Rate Model 3830 LEDs Label Color Indicates Comsphere 3800 Series Modems ± Model August Model 3830 Modem Package Model 3830 Modem Installation Customer- Supplied Equipment Model 3830 Installation Model 3830 Rear Panel Dial-Line Connection DTE Connection Telephone Connection Wire Leased-Line ConnectionAC Power Transformer Connection Modem Power-Up Communications Software Installation Selecting Factory Configuration Options Type AT&Fy&Wn Recovering AT Commands Press Enter 25bis Applications Initialization Strings AT&T Exclusive Dialing for Datakit Applications Synchronous Leased-Line Applications Fax Operation Fax Operation Comsphere 3800 Series Modems ± Model Operating Modes AT Command Set and S-Registers Escape Sequence and Escape Guard Time Switching Between Data Mode and Online Command Mode Command Guidelines Result Codes Result Codes Connection at 7200 bps Connection at 16,800 bps AT Command List  Repeat Last Command Model 3830 AT Commands  AT Command Recovery Mode Answer Mode  ITU-T/Bell Mode ATD9,5551234 Model 3830 AT Commands Dn  Dial En  Command Character Echo Model 3830 AT CommandsHn  Hook Switch Control DS=n  Dial Stored Number Ln  Speaker Volume Model 3830 AT Commands  Identification Return to Online or Data Mode Mn  Speaker On/Off Sn=r  Change S-Register Model 3830 AT Commands Qn  Result CodesSn?  Display S-Register  Tone Dial Extended Result Code Yn  Long Space Disconnect Zn  Reset and Load Active Model 3830 AT Commands Cn  LSD Control Fn  Select Factory Default Configuration Options Model 3830 AT Commands Dn  DTR Action Gn  V.22bis Guard Tone G0 DisableOption Value Jn  Dial Transmit Type Ln  Leased Mode Comsphere 3800 Series Modems ± Model Model 3830 AT Commands Model 3830 AT Commands Sn  DSR Control Model 3830 AT Commands Tn  Tests Xn  Transmit Clock Source Model 3830 AT Commands Vn  View Configuration OptionsWn  Write Save to Memory \A3 Model 3830 AT Commands Zn=x  Store Telephone Numbers\An  Maximum Frame Size \Gn Modem to Modem Flow Control Model 3830 AT Commands \Cn  Error Control Negotiate Buffer\Dn  CTS Control Break Buffer Control \Q2 Model 3830 AT Commands Nn  Error Control Mode \ Xn  XON/XOFF Passthrough Flow Control Model 3830 AT Commands \Tn  No Data Disconnect TimerAn  Error Control Fallback Character Model 3830 AT Commands Bn  Modulation and Data Rate ″ Hn  V.42bis Compression Model 3830 AT Commands Cn  MNP5 Data CompressionRn  DTE Rate Model 3830 S-Registers S0  Auto-Answer Ring Number Register List S3  Carriage Return Character Model 3830 S-Registers S2  AT Escape CharacterS4  Line Feed Character S5  Backspace Character Model 3830 S-Registers S6  Blind Dial Pause S7  No Answer TimeoutS8  ``,º Pause Time for the Dial Modifier S10  No Carrier Disconnect S34  1800 Hz Training Tone Model 3830 S-Registers S18  Test TimeoutS26  RTS-to-CTS Delay S36  Rate Auto Originate Model 3830 S-Registers S35  Auto Redial Leased Line S38  DTR Cont Repeat Model 3830 S-Registers S37  Auto Redial S41  Dial-Line Rate Model 3830 S-Registers S39  Receive Buffer Disconnect Delay S45  Leased Line Transmit Level Model 3830 S-Registers S43  V.32bis TrainS44  Leased-Line Rate S47  Auto Dial Standby Model 3830 S-Registers S46  Bad Lines Auto Originate S51  DTE Remote Loopback CT140 S49  Transmit Buffer Disconnect DelayModel 3830 S-Registers S48  Leased Line Carrier On Level S56  Remote Access Password S55  Access from RemoteModel 3830 S-Registers S52  DTE Local Loopback CT141 S53  V.54 Address S58  Remote Access Password Model 3830 S-Registers S57  Remote Access PasswordS59  Remote Access Password S61  CT111 Rate Control S64  V.25bis New Line Character Model 3830 S-Registers S62  V.25bis CodingS63  V.25bis Idle Character S67  Directory Location 1 Callback Model 3830 S-Registers S65  Line Current DisconnectS66  NMS Call Messages S74  Network Position Identification Model 3830 S-Registers S69  Make Busy Via DTRS75  Network Management Address S76  V.32bis Autorate Dial Line S78  V.32bis Automode Dial Line Model 3830 S-Registers S77  DTR Alarm Reporting S82  V.32bis Autorate Leased Line S81  Leased Line Signal Quality Retrain S85  Fast Disconnect Model 3830 S-Registers S84  AT Command ModeS88  Straps When Disconnected S90  DTE Rate = VF Rate Model 3830 S-Registers S89  V.42 ARQ Window Size Increase S93  RJ11 Cellular Adapt Model 3830 S-Registers S91  Cellular Enhancements Comsphere 3800 Series Modems ± Model August Troubleshooting a Modem Health Symptom ActionTable A-1 Modem ± DTE Connection Table A-2 Table A-3 Modem ± VF Connection Symptom Action Modem Ð DTE Connection Modem ± VF Connection Online Operation Table A-4 Leased-Line Operation Table A-5 Technical Specifications Technical Specifications B Compatibility Table B-1 Model 3830 Technical Specifications Description Power Error Control Pin Assignments C Signal Circuit Pin Source FunctionEIA-232-D Pin Assignments Table C-1 EIA-232-D Pin Assignments RS-232 Name Signal Source Circuit Function VF Connector Pin Assignments Comsphere 3800 Series Modems ± Model Leased Center Comsphere 3800 Series Modems ± Model ITU-T V.25bis Dialing Commands Response D Call Request Commands Call Request with Stored Memory Address Provided CRS Call ResponseCall Request with Number Provided CRN Call Failure Indication CFI Call Connecting CNX Incoming Call INC Call Answer CommandsDisregard Incoming Call DIC Connect Incoming Call CIC List Stored Number Response LSN Program Normal PRNRequest List of Stored Numbers RLN Invalid INV Command ResponseValid VAL Call Request Commands List Response Comsphere 3800 Series Modems ± Model Active Operating Glossary Asynchronous CSA DCE DOC FCC ITU-T JM8 PBX Pstn Xoff Comsphere 3800 Series Modems ± Model Glossary-12 Index Symbols Index-2 Index Index-4 DTR Index-6 Index-7 Index-8 Index-9 Index-10 Index-11 Index-12