Fax Information:
(This is subject to change, based on Rom Rev. 2.57 )

Some basic information:
AT+F0 disables fax mode for sending. If you dial out, the modem will
try to establish a data connection.
NOTE: This is NOT TRUE for ROM's after 4/1/91
AT+F1 enables fax mode for sending. If you dial out, the modem will try
to connect to a fax machine.
AT+A0 tells the modem to answer calls as a data modem only.
AT+A1 tells it to answer as a fax modem only
AT+A2 enables intelligent handshaking. If the call is a data call the
modem will establish a data connection. If the call is FAX.....
The result codes sent back tell the comm software which one it is.
( CONNECT ???? for data or INCOMING FAX for fax).
There is not much time between the FAX result and the next thing that
happens. So you better start the FAX program fast. At the beginning of
each incoming page the modem will say CONNECT ????/FAX. You wait then
for carrier and write the data to disk while carrier is present. If you
get another CONNECT ????/FAX do it again. The data will be in modified
huffman format (compressed) conforming to CCITT T.4 specs.