Chapter 4 - AT Commands, S-Registers, and Result Codes

description for this case). The value of $MB will change if S76 is changed and the value of S76 will change if $MB is changed.

*The MTA128ST-USB is manufactured in two builds. To determine the build of your terminal adapter (TA), issue the ATI2 command in a terminal window. If the TA responds to the command with MTA128ST-USB, then it supports V.110. If your TA resonds to the ATI2 command with MTA128ST-USB-RC, V.110 support is not available.

Command:

%En

Function:

Escape Sequence Options

Values:

n = 0–5

Default:

%E1 and %E4

Description: By default, the TA responds only to the +++ escape method. However, you can use the %E command to set the TA to respond only to the <break> method, to respond to either the +++ or the <break> method, or to ignore both methods and not escape.

%E0

Modem won’t escape

%E1

+++ escape method

%E2

<break> escape method

%E3

Both +++ and <break> escape methods

%E4

Disable OK response to +++

%E5

Enable OK response to +++

%E1 %E5

Enable +++ method and OK response to +++

%E3 %E5

Enable +++ or <break> method and OK response to +++

Data Call Commands

Use these commands to make or configure data calls.

Command: A

Function:

Answer Call

Values:

none

Default:

none

Description: Forces TA to answer an incoming call. To make the TA autoanswer, set register S0 to a value higher than 0.

Command: D

Function: Dial

Values: none

Default: none

Description: The D command causes the TA to dial a number (e.g., ATD785-3500 <cr>).

Command: DSn

Function:

Dialing a Stored Telephone Number

Values:

n = 0–9

Default:

n = 0

Description: To dial a stored telephone number, type &DSn in terminal mode, where n is

 

the location of the number you want to dial. For example, type ATDS3 <cr>

 

dials a telephone stored in memory register 3 location.

Command: Hn

Function:

Hang Up

Values:

0

Default:

n = 0

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