Standard Horizon GM29 manual 11 AT+CVHU Voice Hang-Up, 12 AT+VTS Dtmf and Tone Generation

2.CALL CONTROL

2.11AT+CVHU Voice Hang-Up

Description	Command	Possible Responses
Set Command	+CVHU=[<mode>]	• +CME ERROR: <err>
		• OK
Read command	+CVHU?	• +CVHU: <mode>
		• +CME ERROR: <err>
Test if the command is	+CVHU=?	+CVHU: (list of
supported		supported <mode>s)

Selects whether ATH or “drop DTR” causes a voice connection to be disconnected or not. Voice connection also includes alternating mode calls that are currently in voice mode.

Note! When <mode>=2, this command must be viewed in conjunction with the V.25ter command &D, or &D will be ignored.

<mode>	Description
0	“Drop DTR” ignored but OK response given. ATH
	disconnects
1	“Drop DTR” and ATH ignored but OK response given
2	“Drop DTR” behavior according to &D setting. ATH
	disconnects. Default value

2.12 AT+VTS	DTMF and Tone Generation
	Description	Command	Possible Responses
	Request transmission of	AT+VTS=<DTMF>	OK
	DTMF tone(s)		ERROR
	Show if the command	AT+VTS=?	OK
	is supported		ERROR

This command allows the transmission of DTMF tones. These tones may be used, for example, when announcing the start of a recording period. The command is write only. In this profile of commands, the command does not operate in data or fax modes of operation (+FCLASS=0,1,2-7).

Note! The ATD-command is used only for dialing. It is not possible to generate arbitrary DTMF tones using the ATD command.

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