Multi-Tech Systems MT5600SMI-34 - Manual (Page 111)

Chapter 7 – Voice Commands
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 111
129 Sets more aggressive long-term silence detection independent of
presence or use of silence compression.
<sdi> Decimal number specifying the required period of silence, in units of 0.1
second, before the modem can report silence detected at the end of a voice
receive either with the “Presumed End of Message” (QUIT) or “Presumed
Hangup (SILENCE) event reports. A value of 0 disables the modem silence
detection. The range is 0.1 to 25.5 seconds for <sdi> = 1 to 255.
Reporting Current or Selected Values:
Command: +VSD?
Response: <sds>,<sdi>
Example: 0,50 For the default setting.
Reporting Supported Range of Parameter Values:
Command: +VSD=?
Response: (<sds> range),(<sdi> range)
Example: (0,127-129),(0-255)
Result Codes: OK <hook> = 0 or 1.
ERROR Otherwise, or if not in Voice Mode.
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.