Intel confidential – Intel 537EX User Manual
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536EX Chipset Developer’s Manual
Intel Confidential
IS-101 Voice Mode AT Commands
+VEM=m
see ‘m’
Event Reporting and Masking: This command selects which detection events are supported in voice
mode. Each event is represented by a single bit of a four-digit hex number (see the following table).
Setting an event number bit to 0 means that event is not reported. Setting a bit to 1 indicates that a
detected event is reported. While the event settings affect all modes (that is, playback, record, and
command modes), not just voice command mode, the mask can be changed each time the mode is
changed. Not all events are supported in each mode. See the following table for supported events.
This modem supports more features than an IS-101 Class C-compliant modem. (Class C is the highest
IS-101 compliant modem, and Class A is the lowest.) See the following examples for more information.
m =
Table 25. Voice Mode Command Descriptions (Continued)
Command
Default
Description
NOTE: An asterisk (*) denotes the factory-default setting.
Hex Digit
Location
Event
Number
(Bit Number)
Event Description
DCE Voice Mode(s)
1
0
Caller ID report
Command
1
Reserved
2
Distinctive ringing
All
3 *
RING
All
2
4 *
DTMF received
All
5 *
Receive buffer overrun
Receive
6 *
Fax calling (for example, 1100 Hz)
All
7
Data calling (for example, 1300 Hz)
All
3
8
Local phone on/off hook
All
9 *
Presumed hang-up (SILENCE) time-out
Receive
10 *
Presumed end of message (QUIET) time-
out
Receive and command
11
Reserved
4
12
Reserved
13
Loop current interruption
All
14
Loop current polarity reversal
All
15
Reserved
5
16
Reserved
17
Reserved
18 *
Ringback/remote ring
All
19 *
BUSY reorder/fast busy
Receive and Command
6
20 *
DIALTONE
Receive and Command
21
Reserved
22
Reserved
23*
Transmit buffer under-run
Transmit
7
24
Extension phone on/off hook
All
25 *
Fax or data answer (for example, 2100 Hz)
Command
26
Data answer (for example, 2225 Hz)
Command
27
Reserved
8
28
Reserved
29
Reserved
30
Reserved
31
Reserved
32
Reserved
33
Reserved
34
Reserved
35
Reserved
NOTES:
•
Items marked with an asterisk (*) meet IS-101 Class C specifications.
•
All: Playback, record, and command modes.