Appendix F – Modem AT Commands
Multi-Tech Systems, Inc. MultiAccess User Guide
69
Command:
+PMHF
V.92 Modem Hook Flash
Values:
N/A
Default:
N/A
Description:
Causes the DCE to go on-hook for a specified period of time, and then return off-hook
for at least a specified period of time. The specified period of time is normally one-half
second, but may be governed by national regulations.
Command:
+PQC=n Quick Connect Control
Values:
n = 0, 1, 2, or 3
Default:
3
Description:
Controls 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 cause longer
connect times; thus, 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 current 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.
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. RING result
code is reported after falling edge of the ring pulse (after
the
DRON
report).
+VDR=?
Displays the allowed values.
+VDR?
Displays the current value.
