CPC091892
256.DOC
                    The Complete Communicator
            Solving "No Echo" Problems with the Modem



When I call another system I can hear the other modem answer the
phone,  but I don't get any response.   After a few minutes the
phone gets disconnected.

This is one of the hardest problems to solve.  One of several be
going wrong.  First make sure that your Communication Parameters
are set correctly for the system that you are calling.   This
includes the baud rate,  the Data word size, and the number of
Stop bits.

Second,  you may not be getting a clean enough line to satisfy
one of the modems.   This happens a lot with Long Distance
dialing especially to other countries.   Try dialing back a few
times and if you still can't get through you may have contact us
regarding a different modem.

The third,  and probably the most common problem is that the
other system is having hardware difficulties.   It's hard to tell
from listening to modem tones whether or not the other system is
actually working.   Perhaps the modem on the other end is working
just fine,  but the computer is having problems.   You can
usually tell this if the modems connect,  but there is no
response from the other end.   Eventually the other modem will
hang up.   The only remedy for this is to call the other system's
operator on a voice line and tell him to fix the computer on that
end.

Lastly you may have a problem with your computer setup.   You
must have your communications ports set up correctly for
everything to work.   Check the interrupt levels and the COM port
designations to make sure that you are talking to the correct COM
port.   The Complete PC products use interrupt 4 (IRQ4)  for
COM1:  and interrupt 3 for COM2:.   Ports COM3:  and COM4:  are
not standard DOS devices and are not supported for our equipment
as we are sharing the interrupts selected for use with a possible
plugged in scanner.   The presence of this sharing makes it not
possible to share IRQs between COM1/COM3 and COM2/COM4 as some
other modem manufacturers do.   Serial COM ports must be disabled
in the hardware.   Having nothing plugged into a serial port does
not disable it from use.   If you have serial ports built into
the motherboard,  you will have to disable them using either a
dip-switch,  a jumper,  or possibly by running a built-in setup
program from the boot process.   Consult your computer's
documentation for information on the procedure for your machine.