Motorola 326X V.34 User Manual

Page 113

Troubleshooting Guide 6-3

roubleshooting

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 Motorola Customer Sup-
port 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 CONFIGURA-
TION

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 prop-

erly 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 con-

figuration, 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 Motorola Customer Support.

Double echo on charac-
ters 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
Motorola Customer Support.

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).