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SERIES II INTELLIGENT DATA/FAX MODEMS
3.4 PC Initialization Strings
We recommend the following initialization string for a Series II Modem
connected to a PC-compatible computer when sharing a line with a
telephone:
AT &F X4 S0=0 ^M
This string resets the Modem to the factory default settings, selects ex-
tended result codes with NO DIAL TONE and BUSY, and turns off auto-
answer. ^M must end every string sent to the modem from software.
It is the ASCII code for the RETURN key on most keyboards, and the
default code for the carriage return character in the Modem and most
communications programs. The carriage return character is defined in
the Modem in S-register S3; if you change it, you must also change the
carriage return character code used in your communications software.
If you send a command directly to the modem in terminal mode rather
than indirectly through communications software, you must end the
command string by pressing the RETURN key (<CR>) instead of adding
^M to the string.
The following initialization string is for a Modem on a telephone line
that functions solely as a DATA LINE:
AT &F X4 S0= 2 ^M
3.4.1 Changing Default Parameters
By default, the Series II Modem will answer after the first ring and try to
communicate with a modem on the other end of the line. If you have
one telephone line for voice, fax, and modem communications, the
Modem may attempt to answer all incoming calls, voice as well as data.
To change auto-answer to default off, open your communications
program and type the following string in the terminal window:
AT &F S0=0 &F9 &W0 <CR>