GM47/GM48 INTEGRATOR’S MANUAL
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LZT 123 7263 R1A
2.12 AT+CVHU Voice Hang-Up
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 [3] command &D, or &D will be ignored.
2.13 AT+VTS DTMF and Tone Generation
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.
Description Syntax Possible Responses
Set Command +CVHU=[<mode>] •+CMEERROR:<err>
•OK
Read command +CVHU? •+CVHU:<mode>
•+CMEERROR:<err>
Test if the command is
supported
+CVHU=? +CVHU (list of
supported <mode>s)
<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
Description Command Possible Responses
Requesttransmission of
DTMF tone(s)
AT+VTS=<DTMF> OK
ERROR
Show if the command
is supported
AT+VTS=? OK
ERROR
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