ZyXEL Communications 2864 - Manual (Page 201)

16–25
Answering machine (Data call)
AT+VSM=4
→
Selects 4-bit ADPCM for
the greeting message.
←
OK
AT+VLS=2
→
Connects to the line.
←
VCON
AT+VTX
→
Starts to play the greet-
ing message.
←
CONNECT
<DATA>
→
←
<DLE>c
or
<DLE>5 T.30 fax calling tone
or
DTMF digit '5' is detected.
<DATA>
→
<DLE><ETX>
→
←
OK Returns to the com-
mand state.
AT+FCLASS=2
→
Switches to fax mode.
←
OK
ATA
→
Tries to handshake in the
fax mode.
Switches to fax mode and answers the fax call…
Note: If a modem data tone is detected - a <DLE>e response, the modem
should be switched to data mode.
DTE DCE Description
AT+FCLASS=8
→
Switches to voice mode.
←
OK
AT+VSM=?
→
←
2;ADPCM;2;0;(9600)
3;ADPCM;3;0;(9600)
30;ADPCM;3;0;(9600)
4;ADPCM;4;0;(9600)
OK
DTE DCE Description