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Table 5-1. Troubleshooting the 3460 Fast'R Modem
Problem
DATA MODE
The modem
connects, but
does not pass
data
3460 Fast'R
Diagnosis/Test
Check that the modem
is in data mode (ATO)
Check that the TD
LED is steady on or
flashing when data is
being transmitted from
the computer,
indicating that the
modem is receiving the
data from the
computer.
Check the computer's
flow control method.
Verify line quality:
• Run a remote digital
loopback (RDL) or
RDL with pattern
test.
• Disconnect the
modem from the line
and perform a local
analog loopback
(LAL) or LAL with
pattern test (with
modem flow control
off).
Possible Solution
If the modem is not in data
mode, establish a connection
with the remote modem.
Check computer for EIA signal
requirements.
Ensure the modem is correctly
cabled to the computer (use a
straight-through cable for the
RS-232 interface).
Ensure that the computer's flow
control is the same as the
modem option (AT
If your communications
software's file transfer protocol
is used, and the software
supports RTS/CTS Flow
control, set Flow=RTS/CTS
(AT
FL3). If the package does
*
not support RTS/CTS flow
control, set Flow=Off
(AT
FL0).
*
After running the RDL, if no
errors occur, the line is good.
If errors occur, perform a
manual retrain, or retry the
phone call.
If the device fails, contact
Motorola customer service.
If the device passes, you may
have a line problem (contact
your telephone company) or a
problem with your software
(check with software vendor).
FL).
*
5-5
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Table of Contents
Troubleshooting
