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V.92 commands (+p and –q commands) – Multi-Tech Systems MTS2SA-T User Manual

Page 115

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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)

115

V.92 Commands (+P and –Q Commands)

This section describes the +P (PCM DCE) and –Q commands and parameters used to control the V.92 Mode
operation.

Command:

+PCW

Call Waiting Enable

Description:

Controls the operation of the modem in the presence of call waiting.

Defined Values:

+PCW0

Request modem-on-hold if enabled by +PMH and collect caller ID
information if enabled by +VRID. Toggle V.24 circuit 125. (Default.)

+PCW1

Hang-up.

+PCW2

Ignore call waiting.

Result Codes:

OK

ERROR

Report Commands:

+PCW?

Reports Selected Value(s).

+PCW=?

Reports Supported Range of Parameter Values


Command:

+PMH Modem-on-Hold

Enable

Description:

Controls the selection of modem-on-hold in the modem. The action of the modem
in response to modem-on-hold events 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:

+PMH0

Modem-on-hold enabled in V.92 Mode. (Default.)

+PMH1

Disabled modem-on-hold.

Result Codes:

OK 0 or 1 in V.92 Mode (see the +MS command)

ERROR

Report Commands:

+PMH?

Reports Current or Selected Value.

+PMH=?

Reports Supported Range of Parameter Values.

Command:

+PMHR Initiate

Modem-on-Hold

Description:

Requests the modem to initiate or to confirm a modem-on-hold procedure. The
modem will return ERROR if modem-on-hold is not enabled or if the modem is in
an idle condition. The modem will return the string response +PMHR:
where is a decimal value corresponding to the status of the modem's hold
exchange procedure as defined below. This response may be delayed depending
upon the context under which the +PMHR command is made, i.e., if the +PMHR is
in response to an incoming modem-on-hold or if it is initiating a request.

Note:

If modem-on-hold is enabled but the remote server does not support V.92

then the modem will always report 0 to show that the hold request is denied.

Response:

+PMHR:

The value corresponds to the maximum hold time the server or hold-granting
modem will allow.

+PMHR0

V.92 MOH request denied or not available.

+PMHR1

MOH with 10-second timeout Granted.

+PMHR2

MOH with 20-second timeout Granted.

+PMHR3

MOH with 30-second timeout Granted.

+PMHR4

MOH with 40-second timeout Granted.

+PMHR5

MOH with 1-minute timeout Granted.

+PMHR6

MOH with 2-minute timeout Granted.

+PMHR7

MOH with 3-minute timeout Granted.

+PMHR8

MOH with 4-minute timeout Granted

+PMHR9

MOH with 6-minute timeout Granted.

+PMHR10 MOH with 8-minute timeout Granted.

+PMHR11 MOH with 12-minute timeout Granted.

+PMHR12 MOH with 16-minute timeout Granted.

+PMHR13 MOH with indefinite timeout Granted.

Result Codes:

OK 0-13 in V.92 Mode (+MS=V92)

ERROR

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