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The Modem Doesn't Detect a Carrier Signal
If the modem comes on but doesn't detect a carrier signal
(even though you can hear it through a telephone connected
to the modem), make sure the phone connections are secure.
This is particularly important if you are using a "Y" adapter
to connect both the modem and a phone to the line.
Check to make certain the "Y" adapter is plugged securely
into the back of the modem and that the modular phone con¬
nectors from the modem and the telephone set are properly
plugged into the adapter. Make sure that both phone cables
are terminated in RJIlC-compatible plugs. A local electronics
supply house or your ATARI retailer can tell you if you have
the correct phone cable.
No Data Is Exchanged
If no data is being exchanged by your modem and computer
[the SD (Send Data) and RD (Receive Data) indicators on
your modem aren't flashing when they should be], check to
be sure that the RS232 or SIO cable connecting the modem
to the computer is plugged in securely and in the correct port.
The modem's RS232 cable must be plugged into a port labeled
RS232 or MODEM on the back of the computer. (Do NOT plug it
into a port labeled PARALLEL.) Also, because some computers
have more than one serial port, make sure you've used the
proper software command to direct your computer's data out¬
put to the correct serial port.
Check that the cable's pin-out connections match those of
the modem and computer. See your computer's owner's
manual for a list of pin-out signals for your computer's serial
port. Compare those signals with your modem's pin-out
signals listed in Appendix A. If you are in doubt about your
cable, see your retailer.
Make sure that you've set the communications parameters to
match those of the system you are calling. Both systems must
use the same communication speed and parity, character
length, and stop bit settings. These settings can be made using
your software communications program.
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