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N
:
OTE
The “AT” command sets of mo-
dems vary from manufacturer to
manufacturer. This section pre-
sents a typical setup. This setup
may not be accurate for all mo-
dems. Refer to the documenta-
tion specific to the modem in use.
05547-0798 <90-00047>
OPERATION
Typically, dial tone detection is disabled with the following com-
mand:
ATX3.
This command, however, combines several other commands with
it, such as external results codes and busy tone detection. Other
commands which would disable dial tone detection are:
ATX0 or ATX1
3.
Dial the Off-Net shelf.
The string needed to dial a remote modem must include: the off-
net shelf number, a pause, and then the phone number of the
remote modem. An example of a full dial string looks like the
following:
ATX3DT228,555-1998
“228” is the off-net access shelf number, the comma is typically
used for a delay of 2 seconds, and “555-1998” is the PSTN re-
mote modem number.
The delay may also be adjusted, typically by setting the S8 register
in the modem. If the delay is not long enough to get to the off-net
shelf and onto the PSTN, then this value may have to be adjusted.
The typical setting of a delay is as follows:
ATS8=n
where ‘n’ is the value, in seconds, to delay.
If a modem is using a standard terminal type of program, setting
these command strings is very simple. However, internet access
dialers are usually much more restrictive about setting up modem
parameters. In order to get these dialers to work, the command
strings mentioned above must be put in the file that the Internet
access dialer is using to initialize the modem. Usually, this file is
named “modems.ini”, but this is far from universal.
4.
End of this section.
P
25
AGE
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