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Chapter 10 − Modem Mode AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. MultiConnect Serial-to-Serial Adapter User Guide (S000354A) 116
Command:
+PMHT Modem-on-Hold Timer
Description: Controls whether or not the modem will grant or deny a modem-on-hold (MOH)
request as well as setting the MOH Timeout value.
Defined Values: +PMHT0 Deny V.92 modem-on-hold Request (Default.)
+PMHT1 Grant MOH with 10-second timeout
+PMHT2 Grant MOH with 20-second timeout
+PMHT3 Grant MOH with 30-second timeout
+PMHT4 Grant MOH with 40-second timeout
+PMHT5 Grant MOH with 1 minute timeout
+PMHT6 Grant MOH with 2 minute timeout
+PMHT7 Grant MOH with 3 minute timeout
+PMHT8 Grant MOH with 4 minute timeout
+PMHT9 Grant MOH with 6 minute timeout
+PMHT10 Grant MOH with 8 minute timeout
+PMHT11 Grant MOH with 12 minute timeout
+PMHT12 Grant MOH with 16 minute timeout
+PMHT13 Grant MOH with indefinite timeout
Result Codes: OK 0-13 in V.92 Mode (+MS=V92)
ERROR
Report Commands: +PMHT? Reports Current or Selected Values.
+PMHT=? Reports Supported Range of Parameter Values.
Command:
+PIG PCM Upstream Ignore
Description: Controls the selection of PCM upstream in the modem. The actual state of PCM
upstream is determined by the state of this command as well as the state of a
negotiated handshake with a V.92-compliant server in V.92 Mode.
Defined Values: +PIG0 Enable PCM upstream negotiation.
+PIG1 Disable PCM upstream negotiation. (Default.)
Result Codes: OK 0 or 1 in V.92 Mode (+MS=V.92)
ERROR
Report Commands: +PIG? Reports Selected Value(s).
+PIG=? Reports Supported Range of Parameter Values.
Command:
+PMHF V.92 Modem-on-Hold Hook Flash
Description: Causes the modem to initiate the flash hook sequence when in the modem-on-
hold procedure. This enables switching to the second call (incoming or outgoing).
This command applies only to V.92 modem-on-hold. There are no parameters
associated with this command.
Result Code: OK When the modem completes the flash hook sequence.
ERROR If this command is initiated and the modem is not on hold.
Command:
+PQC V.92 Phase 1 and Phase 2 Control
Description: Controls the global enabling or disabling of the V.92 shortened Phase 1 and Phase
2 startup procedures. This command is used in conjunction with the +PSS
command.
Defined Values: +PQC0 Enable Short Phase 1 and Short Phase 2. (Default.)
+PQC1 Enable Short Phase 1 only.
+PQC2 Not supported.
+PQC3 Disable Short Phase 1 and Short Phase 2.
Result Codes: OK 0, 1, or 3 in V.92 Mode (+MS=V.92)
ERROR
Report Commands: +PQC? Reports Selected Values.
+PQC=? Reports Supported Range of Parameter Values.