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Chapter 6 – Voice Commands
SocketModem Global MT5634SMI Developer’s Guide 55
MP-LPC/Author Multi-pulse LPC
LSLTCQ Least Squares Lattice Trellis Coded Quantization
IS-101 does not make any provisions for standard compression modifiers.
Command: +VTD=<dur> Select Default Beep Tone Duration Timer (DTMF/Tone
Generation Duration)
Result Codes: OK if the modem accepts the command; ERROR if the parameter is out of range.
Description: The +VTD= command causes the modem to set the default DTMF/tone generation duration used
with the +VTS command. This command does not affect the ATD command settings. The <dur>
parameter range is given by the +VTD=? command, in units of 0.01 seconds. A setting of +VTD=0
specifies a manufacturer-specific time interval.
Command: +VDR=<enable>,<report> Enable/Disable Distinctive Ring (Ring Cadence Reporting)
Values: See the Description
Result Codes: OK if the modem accepts the command; ERROR if the parameter is out of range.
Description: The +VDR command causes the modem to enable or disable reporting of the ring cadence
information, and to control the timing of the Ring event code report if ring cadence reporting is
enabled.
This report format is one line per silence period, and one line per ring period. The length of the
silence period is in the form DROF=<number in units of 0.1 seconds><CR><LF>, and the length of
the ring in the form DRON=<number in units of 0.1 seconds>. The <LR> character is optional. The
modem may produce a Ring event code after the DRON message if enabled by the <report>
parameter. The <report> parameter should be set to a value larger than the expected off-times
within a single pattern so that the Ring event reports are issued only during the off-times between
the complex patterns.
<enable> <report>
Description
0 n/a The modem will not generate ring cadence reports. Other call progress
event codes (including Ring) are reported as normal.
1 0 The modem only produces DROF and DRON messages. Other call
progress result codes (including RING) are reported as normal.
1 non-zero The modem only produces DROF and DRON messages. The RING result
code is displayed after the falling edge of the ring pulse (i.e., after the
DRON report).
2–255 non-zero Reserved for future standards.
Example: The lines below shows a cadence with an off time of 4.0 seconds, an on time of 0.8
seconds, an off time of 0.4 seconds, and an on time of 0.8 seconds. The RING result code is
displayed 0.5 seconds after the last DRON message. The command to enable this sample
sequence is +VDR-1,5 , as shown below:
<DLE><X>
DROF=40
DRON=8
DROF=4
DRON=8
RING
<DLE><.>
<DLE><X>
DROF=40
DRON=8
DROF=4
DRON=8
RING
<DLE><.>
Command: +VDT=<enable>,<report> Control Tone Cadence Reporting
Result Codes: OK if the modem accepts the command; ERROR if the parameter is out of range.
Description: The +VDT command causes the modem to enable or disable reporting of the control tone cadence
information in the frequency band used by the Ring Back/Remote Ring, Busy, and Reorder/Fast
Busy tones (usually in the 300 - 600 Hz range). This reporting is subject to the tone detection
restrictions reported by the +VLS=? command.