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Host-Based Controller Modem Data Addendum
AT Command Set June 15, 1998
AT Voice Commands Reference (continued)
Lucent Technologies Inc. Version 1.0
54
AT+VSD=128,0 DTE selects normal silence detection sensitivity, and a silence detection interval
of 0 seconds. Disable silence detection.
OK DCE responds.
<DLE>-R DCE detects another ring, and notifies DTE.
AT+VLS=1 The modem answers the call.
OK DCE is off-hook.
The TAD next plays its greeting message, issues a beep, and records the caller's message.
Command Description
AT+VTX DTE selects voice transmit mode.
CONNECT DCE responds.
<Data> DTE plays greeting through modem to remote caller.
<DLE><ETX> DTE indicates end of voice transmit data.
OK DCE acknowledges switch back to voice command state.
AT+VTS=[933,0,120] DTE annotates greeting message with a 1.2 second beep.
OK DCE responds.
AT+VSD=128,50 DTE selects normal silence detection sensitivity and a silence detection interval
of 5 seconds. Enable silence detection.
OK DEC responds.
AT+VLS=5 The speaker is attached to the system, and the modem is off-hook.
OK DCE is off-hook.
AT+VRX DTE selects voice receive mode.
CONNECT DCE agrees.
<Data> DCE delivers <DLE> shielded voice message to DTE.
The caller leaves a message, and hangs up. The modem detects silence for a specified period of time, and then
notifies the DTE that the message being recorded has ended.
Command Description
<DLE>-s DCE issues presumed end of message after silence detection interval has
elapsed.
<DLE>-! DTE signals end of voice receive state.
<DLE><ETX> DCE ends voice transmission to DTR, with this code, and returns back to voice
command state.
ATH DTE issues standard command to terminate call. Speakerphone goes on-hook,
speaker and microphone are detached from system, and modem returns to data
mode (+FCLASS=0).
OK DCE responds.