User Guide Modem 3460

3460 Fast’R
5-9
LEASED-LINE OPERATION
Modem won’t
connect
Determine whether
modems are assigned
to answer and
originate.
Ensure one modem is set to
answer (AT
*
CA1) and one to
originate (AT
*
CA0).
Run an LAL pattern
test (AT&T8) on both
modems.
• If errors are found on either
end, contact Motorola
customer service.
• If the modem passes the test,
you may have line problems;
contact your telephone
company.
Check the modulation
configuration:
• Mode (AT
*
MM)
• Max Rate (AT
*
MX)
• Min Rate (AT
*
MN)
Ensure that the local and remote
modem modulation modes are
compatible.
Check local and remote
leased line transmit
level (AT
*
LX).
• USA: if operating on a leased
line, set to 0 (AT
*
LX0)
• If the transmit level is
adjustable in your country, and
the modems are running back-
to-back, adjust it to
approximately -15 dB
(AT
*
LX15)
Table 5-1. Troubleshooting the 3460 Fast’R Modem
Problem Diagnosis/Test Possible Solution