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2. Model 3830 Modem Installation
2-113830-A2-GB91-30 August 1998
Initialization Strings
An initialization string contains several AT commands that are entered
at once to program the modem for a specific application.
The following initialization strings identify essential AT commands
that directly impact modem operation for a particular application. If
you need to modify these strings for your application, make sure
additional commands are inserted somewhere in the middle of the
initialization string. Whenever an &L command is used, it must appear
at the end of an initialization string.
V.25bis Applications
For V.25bis HDLC dial-line operation, create an initialization string
with the following commands. Note that the character format can be 8
data bits, no parity, and 1 stop bit; 7 data bits, odd parity, and 1 stop bit;
or 7 data bits, even parity, and 1 stop bit:
TYPE: AT&F &D1 &S1 &M234 &W
PRESS: Enter
For V.25bis Bisync operation, create an initialization string with the
following commands. Note that the character format must be 7 data
bits, odd parity, and 1 stop bit:
TYPE: AT&F &D1 &S1 &M233 &W
PRESS: Enter