Quick-Reference

Configuration

Table A-1.

AT Commands, Cross-Referenced to Front Panel Options (Continued)

AT

Parameter &

 

Command

Option

Description

 

 

 

AT*SM2

=Reliable

In an asynchronous application, once the local modem connects with the remote modem, it

 

 

attempts to establish an error-corrected link. In Reliable data mode, the modem uses speed

 

 

conversion (if enabled). The local modem disconnects if it cannot establish an error-corrected

 

 

link. Enable the terminal flow control when operating in reliable mode. Ifthe modem

 

 

negotiates a connection in theV.21 or Bell 103 modulation mode, it terminates the call.

 

 

If operating with SDC enabled in both modems, once the local modem connects with the

 

 

remote modem, it attempts to establish an error-corrected link. In SDC mode, the Data

 

 

Compression (AT*DC) and Error Correction (AT*EC) options are ignored; a connection is

 

 

attempted usingV.42bis data compression and LAPM error correction. The local modem

 

 

establishes a synchronous Reliable connection or disconnects if it cannot establish an

 

 

error-corrected link. In Reliable data mode, the modem uses speed conversion (if enabled).

 

 

Enable the terminal flow control when operating in reliable mode. If the modem negotiates a

 

 

connection in the V.21 or Bell 103 modulation mode, it terminates the call.

 

 

In Reliable data mode, leased-line operation, the modem initiates a retrain if the

 

 

error-correction function does not establish a reliable link within 30 seconds.

AT*SM3

=Auto-Reliable

Once the local modem connects with the remote modem, it attempts to establish an

 

 

error-corrected link. In Auto-Reliable data mode, the modem uses speed conversion (if

 

 

enabled). This lets the modem automatically accommodate DTEs of different speeds. The

 

 

modem reverts to Normal mode if it cannot establish an error-corrected link. In SDC mode,

 

 

with the Auto Rel option, the modem reverts to Direct mode if it cannot establish an

 

 

error-corrected link.

 

 

Enable terminal flow control when operating in the Auto-Reliable mode. If the local modem

 

 

negotiates a connection in theV.21 or Bell 103 modulation mode, Normal mode is used in

 

 

asynchronous applications; Direct mode is used in synchronous applications.

AT*SM4

=Spd AutoRel

Speed-Dependent Auto-Reliable. Once the local modem connects with the remote modem, it

 

 

attempts to establish an error-corrected link. If a connection is established at 1200 bps or less,

 

 

Normal mode is used in async applications; Direct mode is used in sync applications.

 

 

In data mode, the Speed-Dependent Auto-Reliable mode uses speed conversion (if enabled).

 

 

This lets the modem automatically accommodate DTEs of different speeds. Enable terminal

 

 

flow control when operating in the Auto-Reliable mode.

 

 

 

 

RemRTS/DCD

RTS/DCD Remote Signaling

 

 

This command allows for two types of PN signaling. It is valid when RTS or DCD=Remote.

AT*SR0

= Codex

The Codex setting lets you configure the modem for Telenetics- or Motorola-proprietary

 

 

signaling.

AT*SR1

= V.13

This setting allows ITU V.13-compliant signaling for synchronous applications only.

AT*ST0

Long-form status

Refer to AT&V for a description of theAT *ST command.

AT*ST1

Short-form status

 

 

TpDlyMin

Throughput Minimization Delay

 

 

Lets you improve modem performance in SDC mode by minimizing delays during data

 

 

transmission. This feature, when enabled, lets the remote modem, only, begin transmitting

 

 

synchronous data to its DTE, before an entire frame of data has been received from the local

 

 

modem. This option applies only when the modem is operating in SDC mode.

AT*TD0

=Off

Throughput Delay Minimization is disabled. With this setting, the remote modem waits until it

 

 

has received an entire frame of data before beginning to transmit the data to its DTE.

Gray shading indicates country-specific options. See Appendix C for your country’s options.

A-30 Configuration Quick Reference

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Telenetics V.32bis Series, V.34-SDC manual RemRTS/DCD, RTS/DCD Remote Signaling, TpDlyMin, Throughput Minimization Delay
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