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Paradyne manual Model 3830 AT Commands \Cn  Error Control Negotiate Buffer, Dn  CTS Control

Models: 3830

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COMSPHERE 3800 Series Modems ± Model 3830

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Model 3830 AT Commands

\Cn  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 to this configuration option do not take effect until a disconnect occurs.

\C0 Disable.

\C1 Enable.

\C2 Disable and Switch. Modem automatically switches to Buffer mode if it receives an error control fallback character (an ASCII carriage return  see %A command) during error control negotiation.

\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 is receiving from the remote modem, but is not passing the data on to the DTE, it can issue XON/XOFF flow control characters to the remote modem. This only applies during Buffer mode connections where the remote modem also has modem-to-modem flow control enabled. If Error Control mode is enabled, flow control between the modems will happen automatically, regardless of the setting of this configuration option.

\G0 Disable.

\G1 Enable.

4-24

August 1998

3830-A2-GB91-30

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$Paradyne Model 3830 AT Commands \Cn  Error Control Negotiate Buffer, Dn  CTS Control, Gn Modem to Modem Flow Control$

Contents

Comsphere 3800 Series Modems Model Comsphere Series Modems ModelWarranty, Sales, and Service Information TrademarksImportant Safety Instructions Safety Instructions F FC FC F CCC C FC CC FC C C Government Requirements and Equipment Return United StatesComsphere 3800 Series Modems ± Model Switched Telephone Network CanadaComsphere 3800 Series Modems ± Model Table of Contents AT Command Set and S-Registers AppendicesList of Figures FiguresList of Tables TablesHow to Use this Manual PrefaceObjectives and Reader Assumptions Related Documents Introduction OverviewFeatures Status Indicators LEDs Model 3830 Front PanelModel 3830 LEDs Label Color IndicatesModel 3830 LEDs Label Color Indicates RateComsphere 3800 Series Modems ± Model August Model 3830 Modem Installation Model 3830 Modem PackageModel 3830 Installation Customer- Supplied EquipmentModel 3830 Rear Panel DTE Connection Dial-Line ConnectionWire Leased-Line Connection AC Power Transformer ConnectionTelephone Connection Communications Software Installation Modem Power-UpSelecting Factory Configuration Options Type AT&Fy&Wn Recovering AT Commands Press Enter Initialization Strings 25bis ApplicationsSynchronous Leased-Line Applications AT&T Exclusive Dialing for Datakit ApplicationsFax Operation Fax OperationComsphere 3800 Series Modems ± Model AT Command Set and S-Registers Operating ModesSwitching Between Data Mode and Online Command Mode Escape Sequence and Escape Guard TimeCommand Guidelines Result Codes Result CodesConnection at 7200 bps Connection at 16,800 bps AT Command List Model 3830 AT Commands  AT Command Recovery Mode  Repeat Last Command Answer Mode  ITU-T/Bell ModeModel 3830 AT Commands Dn  Dial ATD9,5551234Model 3830 AT Commands En  Command Character EchoHn  Hook Switch Control DS=n  Dial Stored NumberModel 3830 AT Commands  Identification Ln  Speaker Volume Return to Online or Data Mode Mn  Speaker On/OffModel 3830 AT Commands Qn  Result Codes Sn=r  Change S-RegisterSn?  Display S-Register  Tone DialExtended Result Code Zn  Reset and Load Active Yn  Long Space DisconnectModel 3830 AT Commands Cn  LSD Control Model 3830 AT Commands Dn  DTR Action Fn  Select Factory Default Configuration OptionsG0 Disable Option ValueGn  V.22bis Guard Tone Ln  Leased Mode Jn  Dial Transmit TypeComsphere 3800 Series Modems ± Model Model 3830 AT Commands Model 3830 AT Commands Sn  DSR Control Model 3830 AT Commands Tn  Tests Model 3830 AT Commands Vn  View Configuration Options Wn  Write Save to MemoryXn  Transmit Clock Source Model 3830 AT Commands Zn=x  Store Telephone Numbers \An  Maximum Frame Size\A3 Model 3830 AT Commands \Cn  Error Control Negotiate Buffer \Dn  CTS Control\Gn Modem to Modem Flow Control Break Buffer Control Model 3830 AT Commands Nn  Error Control Mode \Q2Model 3830 AT Commands \Tn  No Data Disconnect Timer An  Error Control Fallback Character\ Xn  XON/XOFF Passthrough Flow Control Model 3830 AT Commands Bn  Modulation and Data Rate Model 3830 AT Commands Cn  MNP5 Data Compression Rn  DTE Rate″ Hn  V.42bis Compression Register List Model 3830 S-Registers S0  Auto-Answer Ring NumberModel 3830 S-Registers S2  AT Escape Character S3  Carriage Return CharacterS4  Line Feed Character S5  Backspace CharacterS7  No Answer Timeout Model 3830 S-Registers S6  Blind Dial PauseS8  ``,º Pause Time for the Dial Modifier S10  No Carrier DisconnectModel 3830 S-Registers S18  Test Timeout S26  RTS-to-CTS DelayS34  1800 Hz Training Tone Model 3830 S-Registers S35  Auto Redial Leased Line S36  Rate Auto OriginateModel 3830 S-Registers S37  Auto Redial S38  DTR Cont RepeatModel 3830 S-Registers S39  Receive Buffer Disconnect Delay S41  Dial-Line RateModel 3830 S-Registers S43  V.32bis Train S44  Leased-Line RateS45  Leased Line Transmit Level Model 3830 S-Registers S46  Bad Lines Auto Originate S47  Auto Dial StandbyS49  Transmit Buffer Disconnect Delay Model 3830 S-Registers S48  Leased Line Carrier On LevelS51  DTE Remote Loopback CT140 S55  Access from Remote S56  Remote Access PasswordModel 3830 S-Registers S52  DTE Local Loopback CT141 S53  V.54 AddressModel 3830 S-Registers S57  Remote Access Password S58  Remote Access PasswordS59  Remote Access Password S61  CT111 Rate ControlModel 3830 S-Registers S62  V.25bis Coding S63  V.25bis Idle CharacterS64  V.25bis New Line Character Model 3830 S-Registers S65  Line Current Disconnect S66  NMS Call MessagesS67  Directory Location 1 Callback Model 3830 S-Registers S69  Make Busy Via DTR S74  Network Position IdentificationS75  Network Management Address S76  V.32bis Autorate Dial LineModel 3830 S-Registers S77  DTR Alarm Reporting S78  V.32bis Automode Dial LineS81  Leased Line Signal Quality Retrain S82  V.32bis Autorate Leased LineModel 3830 S-Registers S84  AT Command Mode S88  Straps When DisconnectedS85  Fast Disconnect Model 3830 S-Registers S89  V.42 ARQ Window Size Increase S90  DTE Rate = VF RateModel 3830 S-Registers S91  Cellular Enhancements S93  RJ11 Cellular AdaptComsphere 3800 Series Modems ± Model August Troubleshooting a Symptom Action Table A-1Modem Health Table A-2 Modem ± DTE ConnectionTable A-3 Modem ± VF Connection Symptom Action Modem Ð DTE Connection Modem ± VF Connection Table A-4 Online OperationTable A-5 Leased-Line OperationTechnical Specifications B Technical SpecificationsTable B-1 Model 3830 Technical Specifications Description CompatibilityPower Error Control Signal Circuit Pin Source Function Pin Assignments CEIA-232-D Pin Assignments Table C-1 EIA-232-D Pin Assignments RS-232 NameSignal Source Circuit Function VF Connector Pin Assignments Comsphere 3800 Series Modems ± Model Center LeasedComsphere 3800 Series Modems ± Model ITU-T V.25bis Dialing Commands Response D Call Request Commands Call Response Call Request with Number Provided CRNCall Request with Stored Memory Address Provided CRS Call Connecting CNX Call Failure Indication CFICall Answer Commands Incoming Call INCDisregard Incoming Call DIC Connect Incoming Call CICProgram Normal PRN Request List of Stored Numbers RLNList Stored Number Response LSN Command Response Valid VALInvalid INV Call Request Commands List Response Comsphere 3800 Series Modems ± Model Glossary Active OperatingAsynchronous CSA DCE DOC FCC ITU-T JM8 PBX Pstn Xoff Comsphere 3800 Series Modems ± Model Glossary-12 Symbols IndexIndex-2 Index Index-4 DTR Index-6 Index-7 Index-8 Index-9 Index-10 Index-11 Index-12