Standard Horizon GM29 manual 10 AT+CMOD Call Mode, At+Cmod?, At+Cmod=?

GM29 INTEGRATOR’S MANUAL

2.10 AT+CMOD Call Mode

Description	Command	Possible Responses
Request Call Mode	AT+CMOD=[<mode>]	• OK
		• ERROR
Shows the current	AT+CMOD?	• +CMOD: <mode>
setting		• OK
		• ERROR
Show if the command	AT+CMOD=?	• +CMOD: (list of
is supported		supported
		<mode>s)
		• OK
		• ERROR

Selects the call mode of further dialing commands (D) or for next answering command (A). Mode can be either single or alternating. In this ETS, terms “alternating mode” and “alternating call” refer to all GSM bearer and teleservices that incorporate more than one basic service (voice, data, fax) within one call.

When single mode is selected the call originating and hang-up procedures are similar to procedures specified in ITU-T Recommendations V.25ter, T.31 and T.32. In GSM there can be voice followed by data (refer to GSM 02.02), alternating voice/data (refer to GSM 02.02) and alternating voice/fax calls (refer to GSM 02.03).

Test command returns values supported by the TA as a compound value.

Note! +CMOD is set to zero after a successfully completed alternating mode call. It is set to zero also after a failed answering. The power-up, factory (&F) and user resets (Z), also set the value to zero. This reduces the possibility that alternating mode calls are originated or answered accidentally.

<mode> Description

0Single mode. Default value.

In order to avoid accidental originating or answering of alternating calls is <mode> set to single mode in following cases:

-after a successfully completed alternating mode call;

-after a unsuccessful answering;

-after successfully execution of the commands &F and Z

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