Motorola 326X V.34 - Manual (Page 152)

A-30 Configuration Quick Reference
Configur
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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. If the modem
negotiates a connection in the V.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 using V.42bis data compression and LAPM error correction. The local modem
establishes a synchronous Reliable connection or disconnects if it cannot establish an error-cor-
rected 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-correc-
tion 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 the V.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 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 the AT * 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.
Table A-1.
AT Commands, Cross-Referenced to Front Panel Options (Continued)
AT
Command Parameter &
Option
Description
Gray shading indicates country-specific options. See Appendix C for your country’s options.