You can use the AT+VEM command to define events on which to report. The list is encoded as a word composed of the following bits.
NOTE:
All events are enabled by default and indicated by the underlined bit number.
A 1 in a bit-position indicates an event is reported.
A 0 in a bit-position indicates an event is not reported.
Read bits from right (Bit 0) to left (Bit 32).
Blank table entries are unsupported events.
Bit |
Signal |
0 |
Caller ID (effective only where function is supported by the phone company. Not supported on Data/Fax modems. |
1 |
|
2 |
Distinctive Ring (effective only where function is supported |
3 |
RING |
4 |
DTMF Detection |
5 |
Receive Buffer Overrun |
6 |
Fax Calling |
7 |
Data Calling |
8 |
|
9 |
Presumed Hang-Up (SILENCE) Time-Out |
10 |
Presumed End-of-Message (QUIET) Time-Out |
11 |
|
12 |
|
13 |
|
14 |
|
15 |
|
16 |
|
17 |
|
18 |
Ring Back |
19 |
BUSY |
20 |
DIALTONE |
21 |
|
22 |
|
23 |
Playback Buffer Underrun |
24 |
|
25 |
Fax or Data Answering Modem Detected |
26 |
|
27 |
Voice Detected |
28 |
|
29 |
|
30 |
|
31 |
|
32 |
|