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Troubleshooting Guide 6-3
Troubleshooting
326X Series Modem Troubleshooting Guide
Problem Diagnosis/Test Possible Solution
During installation:
Modem won't power up Check AC power.
Check modem's power switch.
Ensure AC outlet is active.
Turn on power switch.
Modem fails self test
(front panel displays
error code)
Repeat power-up sequence. If modem fails once again, call Telenetics’ Customer
Support or your local distributor and report the error
code.
Modem doesn't come up
in ready state— “326X
Ready” on front panel
display
Check DIP Switch #6 on
modem's rear panel.
• Ensure DIP Switch #6 is in the Off (up) position.
• Power cycle the modem.
While operating the 326X as a dial modem:
ACU
CONFIGURATION
No response to ACU
command
Check that TD LED on front
panel lights when commands are
being sent to the modem.
• If light does not come on, check that cables are
properly connected.
• Check the communications software package for
correct communications port configuration.
• Check that the communications software package’s
baud rate is set to a rate that the modem’s autobaud
feature supports.
Check modem's configuration:
• DTE Rate (AT
*
DE)
• ACU Form
• Char Length
• Parity (AT
*
RP)
• Result Code (ATQ)
• Ensure ACU is compatible with modem's
configuration.
• Make sure the DTE is set to a valid character format
to operate the modem’s autobaud feature
(see Chapter 5 for details on this feature).
• If modem still does not respond after modifying
configuration, perform a local analog loopback
(LAL) test. (Refer to the end of this chapter for
details on tests supported, as well as instructions for
initiating tests.)
• If LAL fails, contact Telenetics Customer Support or
your local distributor.
Double echo on
characters typed
Check echo setting on data
terminal equipment and modem.
If both echo settings are on, turn one off. (In some data
terminals, echo is sometimes referred to as half- or full-
duplex.) If this does not solve the problem, contact Tele-
netics Customer Support or your local distributor.
Check the terminal setup of the
communications software.
CALL ESTABLISHMENT
Modem won't answer
Check the modem's
configuration:
• Answer (AT
*
AA) Ensure that Answer is not set to Manual.
• DTR (AT&D) Set DTR=High (AT&D0).