Reference Guide for the Model XM128 ISDN Digital Modem

Conventional dialing commands ATD, ATDT, and ATDP, used by much of the existing communication software, can be mapped onto one of the new dialing commands according to the AT&O setting as shown in Table 6-1.

Table 6-1.

Dialing commands

 

 

AT Command

Dial string it maps to

 

 

AT&O0

ATD, ATDT, and ATDP are the same as ATDB.

 

 

AT&O2

ATD, ATDT, and ATDP are the same as ATDI.

 

 

AT&O3

ATD, ATDT, and ATDP are the same as ATDA.

 

 

The factory default is AT&O2, which means that the Model XM128 modem selects ISDN data mode when you do not specify the communication mode to use (that is, ATD or ATDT).

Placing the Call

To initiate a call, choose the proper communication mode and configure the mode according to the bearer service (or protocol) you want to use. Table 6-2 contains some simple commands that are useful when placing a call.

Table 6-2.

Call placing commands

 

 

Command

Description

 

 

ATBnn

Changes ISDN B channel protocol setting

 

 

ATDL

Redials the last dialed telephone number

 

 

ISDN Overview

6-3

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NETGEAR XM128 ISDN manual Placing the Call, Dialing commands, Call placing commands, AT Command Dial string it maps to