Chapter 4 – Voice Commands

Voice S-Register Summary

Voice mode S-Register changes are outlined below.

S-Register

Description

S0

Automatic answer is disallowed in Voice mode.

S7

Wait for Carrier After Dial. Default is 60 seconds. In Voice mode, S7 contains the

 

maximum amount of time that the modem will wait during Call Origination, all the time

 

detecting for ring backs, before assuming that the remote station will not go off hook.

S10

Automatic disconnect is disallowed in Voice mode.

Voice Commands

The +V Voice enhancements are implemented with AT+V (for Voice) commands, as well as changes to several existing commands.

In general, the modem does not accept Data mode (+FCLASS=0) commands or Fax mode (+FCLASS=1, 2, 2.0) commands when in Voice mode (+FCLASS=8).

Commands That Change for Voice Mode Support

Command:

Description

A

Disallowed in Voice mode.

D

Causes the modem to Dial assuming +VLS=2 if +VLS=0 when the ATD

 

command was entered.

H

Values greater than 0 disallowed in Voice mode.

I

Disallowed in Voice mode.

L

Disallowed in Voice mode.

M

Disallowed in Voice mode.

O

Disallowed in Voice mode.

Q

Disallowed in Voice mode.

X

Disallowed in Voice mode.

Z

Reset modem.

&D

&D1 is disallowed in Voice mode.

+FCLASS=8

Places the modem in Voice mode.

+FCLASS=

New values are added for Voice mode.

+FCLASS=?

New values are added for Voice mode.

Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C)

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Multi-Tech Systems MT5634SMI V.92 Voice S-Register Summary, Voice Commands, Commands That Change for Voice Mode Support

MT5634SMI V.34, MT5634SMI V.92 specifications

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