At Commands; D Dial; Dialing With A Specified Sub-Address; Dialing Stored Numbers - Digi TransPort User Manual

AT commands

D Dial

The ATD command causes the unit to initiate an ISDN call. The format of the command depends
on the mode of operation.
When using the unit to make data calls on one of the ISDN B-channels, enter the ATD command
followed by the telephone number. For example, to dial 01234 567890 enter the command:
atd01234567890
Spaces in the number are ignored. If the call is successful the unit will issue the CONNECT result
code and switch to on-line mode.

Dialing with a specified sub-address

The ATD command may also be used to route a call to an ISDN sub-address by following the
telephone with the letter S and the required sub-address. The sub-address may be up to 15 digits
long. For example:
atd01234567890s003

Dialing stored numbers

To dial numbers that have previously been stored within the unit using the AT&Z command,
insert the S= modifier within the dial string. For example, to dial stored number 3 use the
command:
atds=3

Combining ISDN and X.25 calls

A further option for the ATD command for X.25 applications is to combine the ISDN call and the
subsequent X.25 CALL in the same command. To do this, follow the telephone number with the
"=" symbol and the X.25 call string. For example:
atd01234 567890=123456789
Digi TransPort User Guide 598