Chapter 4 – Voice Commands
Multi-Tech Systems, Inc. SocketModem MT5600SMI/MT5656SMI Reference Guide (S000306C)
109
Command: +VSM Compression Method Selection
Description:
This command causes the modem to set the voice compression method, the
silence compression sensitivity, and the voice-sampling rate.
Syntax: +VSM=<cml>,<vsr>,<sds>,<sel>
Defined Values:
<cml> Decimal number identifying the compression method.
<vsr> <range of values> containing the supported range of voice samples per
second of the analog signal.
<scs> <range of values> containing the supported range of sensitivity settings
for voice receives.
<sel> <range of values> containing the supported range of expansion values
for voice transmits.
Reporting Current or Selected Values:
Command:
+VSM?
Response:
<cml>,<vsr>,<sds>,<sel>
Example: 1,8000,0,0 For the default setting.
Reporting Supported Range of Parameter Values:
Command:
+VSM=?
Response:
<cml>,<cmid>,<bps>,<tm>,<vsr>,<sds>,<sel>
<cml> Decimal number identifying the compression method
(1, 129, 130, 140,
or 141).
<cmid> Alphanumeric string describing the compression method (UNSIGNED
PCM, IMA ADPCM, UNSIGNED PCM, 2 Bit ADPCM, or 4 Bit ADPCM).
<bps> Decimal number defining the average number of bits in the
compressed sample not including silence compression (2, 4 or 8).
<tm> Decimal number (0) reporting the time interval, in units of 0.1 second,
between timing marks. A 0 value reports that timing marks are not supported.
<vsr> <range of values> containing the supported range of voice samples per
second of the analog signal (8000).
<scs> <range of values> containing the supported range of sensitivity settings
for voice receives (0). A 0 indicates not supported.
<sel> <range of values> containing the supported range of expansion values
for voice transmits (0). A 0 indicates not supported.
Example: 1,"UNSIGNED PCM",8,0,8000,0,0
129,"IMA
ADPCM",4,0,8000,0,0
130,"UNSIGNED
PCM",8,0,8000,0,00
140,"2 Bit ADPCM",2,0,8000,0,0
141,"4 Bit ADPCM",4,0,8000,0,0
OK
Result Codes:
OK Valid range.
ERROR Otherwise, or if not in Voice Mode.
Command: +VTD
Beep Tone Duration Timer
Description:
This command causes the modem to set the default DTMF/tone generation
duration.
Syntax: +VTD=<dur>
Defined Values:
<dur> Decimal number specifying the default DTMF/tone generation duration
in units of 0.01 second. A value of 0 specifies the value entered by the S11
parameter (50-255 ms). The range is 0.01 to 2.55 seconds for <dur> = 1 to
255.
Reporting Current or Selected Values:
Command:
+VTD?
Response:
<dur>
Example: 100 For the default setting.
Reporting Supported Range of Parameter Values:
Command:
+VTD=?
Response: (<dur> range)
Example:
(0-255)
Result Codes:
OK <dur>= 0-255.
ERROR Otherwise, or if not in Voice Mode.