ATH (with AT+FCLASS=8)
This command causes the DCE to hang up the phone with the following considerations for a
hang up while in voice mode:
- Force the command AT+FCLASS=0, but do not destroy any of the voice parameters.
- Force voice I/O device to Telco line.
AT+VNH=<value>
This command causes the DCE to disable or enable automatic hang-ups to a varying degree
in the DATA and FAX modes.
<value> = 0 (Default), the DCE shall not disable automatic hang-ups.
<Value> = 1, the DCE shall disable automatic hang-ups. This behavior shall persist until the
DTE issues ATH, ATZ, or AT+VIP command, or DTR drop. The DCE shall perform on hook on
an ATH command.
<Value> = 2, the DCE will disable automatic hang-ups. This behavior will persist until the
DTE issues ATH, ATZ, or AT+VIP command, or DTR drop. The DCE shall not perform on hook
on an ATH command.
AT+VNH?
DCE will return current hang up setting, followed by the OK result code.
AT+VNH=?
DCE will return permitted hang-up modes. The response is:
0,1,2
OK
with <CR><LF> between each line.
ATZ (with AT+FCLASS=8)
This command causes the DCE to enter DATA MODE (AT+FCLASS=0) and set all of the
voice related parameters to their default values.
VOICE MODE COMMANDS
AT+VBT=<value>
This command causes the DCE to set the default DTMF/tone generation duration used in
conjunction with AT+VTS command.
The range of the <value> is from 1 to 255. The units are 0.1 seconds.
Result codes:
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