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Chapter 3 – Voice Commands
Command: +VIT
Description:
Voice Inactivity Timer (DTE/Modem)
This command sets the modem’s initial value for the DTE/modem inactivity timer.
Syntax: +VIT=<timer>
Values:
<timer>
Decimal number corresponding to the time in units of 1.0 second.
A value of 0 disables the timer. Range = 0-255.
Default:
Report Commands:
Command: +VLS
Description:
0
+VIT? Reports current of selected values.
+VIT=? Reports supported range of parameter values.
Analog Source/Destination Selection
This command causes the modem to select one or more source/destinations of the analog
data.
Syntax: +VLS=<label>
Values:
<label>
Decimal number corresponding to the selected analog source/destination
hardware configuration.
Default:
Report Commands:
0
+VLS? Reports current of selected values.
+VLS=? Reports supported range of parameter values.
Report Query Response: <label>,<devices>,<transmit event>,<receive
event>,<idle event>
Where each event subparameter is a hex number the represents an event
bit field of the reporting capabilities of each state. (See the Table Command
Options on the next page):
<label>
<devices>
Identifies the modem analog source/destination hardware
configuration.
A <string constant> made up of Primitives.
<xxxx event> <transmit event>, <receive event>, and <idle
event>subparameters are the DCE event reporting
capabilities for the Voice Transmit State, Voice Receive
State, and the Voice Command State, respectively. Each
of the event reporting subparameters is a hex number that
represents an event bit field. The hex number format is
defined in Table 5-6); a one in the bit field indicates that
the DCE can report the associated event.
Each of the possible hardware configurations has its own <label>, ..., <idle
event> description line (the above form description shows just one). A
<CR><LF> terminates each description line.
+VLS Example:
Result Codes:
AT+VLS=?
0,””,B0804100,B0804100,B0804100
1,”T”,0B8433C1,0FE431C1,0B8431C1
2,”L”,08800300,0CE00100,08800100
3,”LT”,0B8433C1,0FE431C1,0B8431C1
4,”S”,00800300,04E00100,20800100
5,”ST”,0B8433C1,0FE431C1,0B8431C1
8,”S1",00800300, 04E00100,20800100
9,”S1T”,0B8433C1,0FE431C1,0B8431C1
11,”M1",00800300,04E00100,20800100
14,”H”,00800300,04E00100,20800100
18,”M1S”,00800300,04E00100,20800100
19,”M1S1",00800300,04E00100,20800100
OK <label> = 0-5,8-9,11,14,18-19.
ERROR The <label> value is out of range, or if the modem cannot service the request in
the <label> subparameter.
Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273F)
32
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