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Chapter 5 – AT Commands, S-Registers, and Result Codes
SocketModem Global MT5634SMI Developer’s Guide 38
Command: +PQC=n Quick Connect Control
Values: n = 0, 1, 2, or 3
Default: 3
Description: Controls the V.92 shortened Phase 1 and Phase 2 startup procedures (Quick Connect).
When line conditions are stable, quick connect results in shortened connect times; however,
significant fluctuation in line conditions from call to call can result in longer connect times, in
which case it may be advisable to disable quick connect.
+PQC=0 Enables Short Phase 1 and Short Phase 2 (Quick Connect)
+PQC=1 Enables Short Phase 1
+PQC=2 Enables Short Phase 2
+PQC=3 Disables Short Phase 1 and Short Phase 2
+PQC=? Displays the allowed values
+PQC? Displays the current value
Command: +VCID=n Caller ID Selection
Values: n = 0, 1, or 2
Default: 0
Description: Enables Caller ID detection and configures the reporting and presentation of the Caller ID
data that is detected after the first ring. The reported data includes the date and time of the
call, the caller's name and number, and a message. Set S0=2.
+VCID=0 Disables Caller ID
+VCID=1 Enables Caller ID with formatted data
+VCID=2 Enables Caller ID with unformatted data
+VCID=? Displays the allowed values
+VCID? Displays the currrent value
Command: +VDR=x, y Distinctive Ring Report
Values: x = 0, 1 Distinctive Ring report control. See description.
y = 0–255 Minimum ring interval in 100 ms units. See description.
Default: 0, 0
Description: Enables reporting of ring cadence information to the DTE and specifies the minimum ring
cadence that will be reported.
The 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 100 ms<CR><LF>, and the length
of the ring is in the form DRON=number in units of 100 ms<CR> <LF>. The modem may
produce a Ring event code after the DRON message if enabled by the y parameter. The y
parameter must be set to a value equal to or smaller than the expected ring cadence in
order to pass the report to the DTE.
+VDR=0, n/a Disables Distinctive Ring cadence reporting.
+VDR=1, 0 Enables Distinctive Ring cadence reporting. Other call progress result codes
(including RING) are reported as normal.
+VDR=1, >0 Enables Distinctive Ring cadence reporting. The RING result code is reported after
the falling edge of the ring pulse (i.e., after the DRON report).
+VDR=? Displays the allowed values.
+VDR? Displays the currrent value.
Command: #CBAn Callback Attempts
Values: n = 1–255
Default: 4
Description: Sets the number of callback attempts that are allowed after passwords have been
exchanged between modems.
Command: #CBDn Callback Delay
Values: n = 0–255
Default: 15
Description: Sets the length of time (in seconds) that the modem waits before calling back the remote
modem.