User`s guide

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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.
Dialling 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
Dialling 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
Pressing any key while the ATD command is being executed will abort the call attempt.
H Hang-up
The ATH command is used to terminate an ISDN call. If the unit is still on-line you must first
switch back to command mode by entering the escape sequence, i.e. +++, wait 1 second
and then enter an AT command or just AT<CR>.
After entering the ATH command the call will be disconnected and the NO CARRIER result
will be issued.
Z Reset
The ATZ command is used to load one of the stored profiles for the active ASY port. The
command is issued in the format ATZn where n is the number (0 or 1) of the ASY port
profile you wish to load.