

YOUR MODEM HAS THE ABILITY TO ADJUST ITS IMPEDANCE TO MATCH  YOUR
LOCAL PHONE LINE.

     From  terminal  mode. Type AT\E1 and press the [enter]  key.
This tells your modem to adjust to your phone line when you  make
your next V.32bis call. Make the V.32bis call immediately   after
entering  AT\E1.  You may not connect on the first  try,  as  the
modem will be making this adjustment. However your modem will now
be adjusted to the phone line, and this step will not have to  be
repeated unless you change phone lines.


USING PREFIXES TO FORCE 2400 OR 9600 CONNECTIONS.

     Some newer software like Qmodem and Pcplus have a screen  in
the  dialing directory where you can enter dialing  prefixes.  In
Qmodem press E and in Pcplus press P to get that screen. Then  to
use  those prefixes you just put the letter of the prefix  before
the telephone number in the directory. (You may have to go to the
Setup and erase the original ATDT).

                 V.32 / V.42bis Dialing Prefixes

     The  normal dial Prefix is ATDT. If the number  is  423-1563
then  it sends ATDT4231563 to the modem, which then  dials,   and
connects. This is using auto-speed (baud) negotiation as well  as
negotiating   Protocol (V.42bis, MNP etc.). Some  modems/software
you   will  call  do NOT like this.  Listed  are  alternate  dial
Prefixes you may use.

AT&Q5N1DT           :negotiates SPEED and Protocol (default) 1
AT&Q6N1DT           :negotiates SPEED only 1
AT&Q5S37=11N0DT     :*Connect 14400, negotiate Protocol 1 2
AT&Q6S37=11N0DT     :*Connect 14400 only 2
AT&Q5S37=9N0DT      :*Connect 9600, negotiate Protocol 1
AT&Q6S37=9N0DT      :*Connect 9600 only 1
AT&Q5S37=6N0DT      :Connect 2400, negotiate Protocol 1
AT&Q6S37=6N0DT      :Connect 2400 only 1
AT&Q6S37=5N0DT      :Connect 1200 only 1
AT&Q6S37=1N0DT      :Connect 300 only 1
                     * for all V.32 modems
                     1-for error correcting modems
                     2-for V.32bis modems


                                   Don Hinds - Zoom Tech
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