5/ Troubleshooting
and Maintenance
If you have trouble
transmitting data (garbled
data, intermittent errors, etc.) be sure that:
•
The phone connection is clean and noise-free.
•
No one
is talking on the telephone line.
•
The phone and all
extensions are
on-the-hook.
•
The baud rate of the terminals is less than or equal to 300.
If you still
can't
locate
the source of your
problem, run the LOCal Test (and the REMote Test,
too, if necessary).
Error
Messages
? Your Modem
has
received
a
character which isn't in proper order or which it doesn't
understand.
N Error in dialing.
The Modem
isn't programmed properly. This usually means that you
instructed your
Modem to
dial, but it doesn't have a telephone number in its register. Press
C
and start again.
Test Moie Operation
If you have communication problems, first check all your connections and cables!
If neither
you
nor
the person you're
communicating with locate a connection or cable problem,
run the LOCal Test
(both computers
should run this test). If both Modems pass the LOCal Test,
run the REMote Test
together. If both systems
pass the REMote Test, and you're still having
problems
with
data transfer, contact your nearest Radio Shack Computer Center.
LOCal Test
The LOCal
Test checks your modem's filters,
power
supply and circuitry. If one of the modems
fails the LOCal
Test, isolate the problem and
solve
it. The most common cause of failure is a
damaged cable
or improper connection.
1. Set your Modem's POWER Switch
to
ON.
2. Set the TEST Switch
to LOC
(since
the
Modem II always runs the Test first, you can have
the Mode Switches set
to
any combination). The modem's CD light
will
come on.
3.
Type some letters and/or numbers on your Computer's keyboard. If what you type is
displayed on your Screen, your Modem has passed the LOCal Test. If the characters are not
displayed, the Modem has failed the test.
4. If your Modem failed
the LOCal Test (the
typed characters did not appear on your screen),
check the cables and
connections. Then run
the test again. If both modems pass the LOCal
Test and the problem persists, run the REMote test.
To
get out of the Test Mode. . .
How
you get out of the Test Mode depends on how you got into it. In the MANual Mode, just
set
your Modem's
POWER
Switch to OFF or set the TEST Switch to OFF. If you're in the
AUTOmatic Mode
and got into the Test Mode by typing QX, set FORCE DTR to OFF and then
back to ON. Your Modem will
then execute according to the Mode
Switches.
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