Model 3830 AT Commands Nn  Error Control Mode, Q2 | Paradyne

COMSPHERE 3800 Series Modems ± Model 3830

Table 4-2

(20 of 23)

Model 3830 AT Commands

Nn  Error Control Mode

Determines the type of error control used by the modem. In most cases, V42/MNPorBfr is the best choice. If V.42bis and MNP are enabled, then the modem uses the following priority for error control negotiation:

V.42bis, V.42, MNP 5 and below. Online changes do not take effect 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.

Qn Flow Control of DTE, Flow Control of Modem

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	Disable	XON/XOFF
\Q6	Disable	RTS to Modem

FLOW CONTROL OF DTE

Determines how the modem controls the flow of data from the DTE.

FLOW CONTROL OF MODEM

Determines how the DTE controls the flow of data from the modem.

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August 1998

3830-A2-GB91-30

Image 62

Paradyne manual Model 3830 AT Commands Nn  Error Control Mode, Q2

Contents

Comsphere 3800 Series Modems Model Comsphere Series Modems Model Warranty, Sales, and Service Information Trademarks Important Safety Instructions Safety Instructions F FC FC F CCC C FC CC FC C C Government Requirements and Equipment Return United States Comsphere 3800 Series Modems ± Model Switched Telephone Network Canada Comsphere 3800 Series Modems ± Model Table of Contents AT Command Set and S-Registers Appendices List of Figures Figures List of Tables Tables Objectives and Reader Assumptions How to Use this ManualPreface Related Documents Introduction Overview Features Status Indicators LEDs Model 3830 Front Panel Model 3830 LEDs Label Color Indicates Model 3830 LEDs Label Color Indicates Rate Comsphere 3800 Series Modems ± Model August Model 3830 Modem Installation Model 3830 Modem Package Model 3830 Installation Customer- Supplied Equipment Model 3830 Rear Panel DTE Connection Dial-Line Connection Telephone Connection Wire Leased-Line ConnectionAC Power Transformer Connection Communications Software Installation Modem Power-Up Selecting Factory Configuration Options Type AT&Fy&Wn Recovering AT Commands Press Enter Initialization Strings 25bis Applications Synchronous Leased-Line Applications AT&T Exclusive Dialing for Datakit Applications Fax Operation Fax Operation Comsphere 3800 Series Modems ± Model AT Command Set and S-Registers Operating Modes Switching Between Data Mode and Online Command Mode Escape Sequence and Escape Guard Time Command Guidelines Result Codes Result Codes Connection at 7200 bps Connection at 16,800 bps AT Command List  Answer Mode Model 3830 AT Commands  AT Command Recovery Mode Repeat Last Command  ITU-T/Bell Mode Model 3830 AT Commands Dn  Dial ATD9,5551234 Hn  Hook Switch Control Model 3830 AT CommandsEn  Command Character Echo DS=n  Dial Stored Number  Return to Online or Data Mode Model 3830 AT Commands  IdentificationLn  Speaker Volume Mn  Speaker On/Off Sn?  Display S-Register Model 3830 AT Commands Qn  Result CodesSn=r  Change S-Register  Tone Dial Extended Result Code Zn  Reset and Load Active Yn  Long Space Disconnect Model 3830 AT Commands Cn  LSD Control Model 3830 AT Commands Dn  DTR Action Fn  Select Factory Default Configuration Options Gn  V.22bis Guard Tone G0 DisableOption Value Ln  Leased Mode Jn  Dial Transmit Type 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 Model 3830 AT Commands Nn  Error Control Mode \Q2 \ 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 Register List Model 3830 S-Registers S0  Auto-Answer Ring Number S4  Line Feed Character Model 3830 S-Registers S2  AT Escape CharacterS3  Carriage Return Character S5  Backspace Character S8  ``,º Pause Time for the Dial Modifier S7  No Answer TimeoutModel 3830 S-Registers S6  Blind Dial Pause S10  No Carrier Disconnect S34  1800 Hz Training Tone Model 3830 S-Registers S18  Test TimeoutS26  RTS-to-CTS Delay Model 3830 S-Registers S35  Auto Redial Leased Line S36  Rate Auto Originate Model 3830 S-Registers S37  Auto Redial S38  DTR Cont Repeat Model 3830 S-Registers S39  Receive Buffer Disconnect Delay S41  Dial-Line Rate S45  Leased Line Transmit Level Model 3830 S-Registers S43  V.32bis TrainS44  Leased-Line Rate Model 3830 S-Registers S46  Bad Lines Auto Originate S47  Auto Dial Standby S51  DTE Remote Loopback CT140 S49  Transmit Buffer Disconnect DelayModel 3830 S-Registers S48  Leased Line Carrier On Level Model 3830 S-Registers S52  DTE Local Loopback CT141 S55  Access from RemoteS56  Remote Access Password S53  V.54 Address S59  Remote Access Password Model 3830 S-Registers S57  Remote Access PasswordS58  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 S75  Network Management Address Model 3830 S-Registers S69  Make Busy Via DTRS74  Network Position Identification S76  V.32bis Autorate Dial Line Model 3830 S-Registers S77  DTR Alarm Reporting S78  V.32bis Automode Dial Line S81  Leased Line Signal Quality Retrain S82  V.32bis Autorate Leased Line S85  Fast Disconnect Model 3830 S-Registers S84  AT Command ModeS88  Straps When Disconnected Model 3830 S-Registers S89  V.42 ARQ Window Size Increase S90  DTE Rate = VF Rate Model 3830 S-Registers S91  Cellular Enhancements S93  RJ11 Cellular Adapt Comsphere 3800 Series Modems ± Model August Troubleshooting a Modem Health Symptom ActionTable A-1 Table A-2 Modem ± DTE Connection Table A-3 Modem ± VF Connection Symptom Action Modem Ð DTE Connection Modem ± VF Connection Table A-4 Online Operation Table A-5 Leased-Line Operation Technical Specifications B Technical Specifications Table B-1 Model 3830 Technical Specifications Description Compatibility Power Error Control EIA-232-D Pin Assignments Signal Circuit Pin Source FunctionPin Assignments C Table C-1 EIA-232-D Pin Assignments RS-232 Name Signal Source Circuit Function VF Connector Pin Assignments Comsphere 3800 Series Modems ± Model Center Leased 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 Connecting CNX Call Failure Indication CFI Disregard Incoming Call DIC Call Answer CommandsIncoming Call INC 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 Glossary Active Operating Asynchronous CSA DCE DOC FCC ITU-T JM8 PBX Pstn Xoff Comsphere 3800 Series Modems ± Model Glossary-12 Symbols Index Index-2 Index Index-4 DTR Index-6 Index-7 Index-8 Index-9 Index-10 Index-11 Index-12