Chapter 2 – AT Commands

Modem Connection Commands

Command: +PCW=n

Call Waiting Enable

Values:

n = 0, 1, or 2

Default:

2

 

Description:

Controls the action to be taken upon detection of a call waiting tone in V.92 mode.

 

Values specified by this command are not modified when an AT&F command is issued.

 

+PCW=0

Toggles V.24 Circuit 125 and collects Caller ID if enabled by +VCID.

 

+PCW=1

Hangs up.

 

+PCW=2

Ignores V.92 call waiting.

 

+PCW=? Displays the allowed values.

 

+PCW?

Displays the currrent values.

Command: +PIG=n

PCM Upstream Ignore

Values:

n = 0 or 1

 

Default:

1

 

Description:

Controls the use of PCM upstream during V.92 operation. PCM upstream allows faster

 

upload speeds to a V.92 server.

 

+PIG=0

Disables PCM upstream.

 

+PIG=1

Enables PCM upstream.

 

+PIG=?

Displays the allowed values.

 

+PIG?

Displays the current values.

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 fluctuations 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 values.

Command: +PSS

Use Short Sequence

Description:

This command causes a calling modem to force either a V.92 short or full startup

 

sequence as defined by the +PQC command on the next and subsequent connections.

 

Syntax: +PSS=<value>

Values:

<value> Decimal number corresponding to the selected sequence.

 

 

0 The modems decide whether or not to use the short startup procedures.

 

 

The short startup procedures can only be used if enabled by the +PQC

 

 

command. Default

 

 

1 Reserved.

 

 

2 Forces the use of the full startup procedures on the next and subsequent

 

 

connections independent of the setting of the +PQC command.

Result Codes:

OK 0 - 2 in V.92 Mode (+MS=V.92)

 

ERROR Otherwise

Report Commands:

+PSS? Reports selected values.

 

+PSS=? Reports supported range of parameter values.

Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273G)

17

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Multi-Tech Systems MT5600BA-V92 manual Modem Connection Commands, Command +PCW=n Call Waiting Enable

MT5600BA-V92 specifications

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