Chapter 5 Troubleshooting; Table 21. Symptoms With Possible Causes And Actions - Canoga Perkins 2370 User Manual

Chapter 5
Troubleshooting
Use the diagnostic procedures in this section to test and troubleshoot the 2370. Before starting the
diagnostics, obtain this equipment:
•
Multimeter
•
Fiber Optic Power Meter
•
Short (1 m or less) fiber optic jumper cable
•
Bit Error Rate Tester (BERT)
Table 21 lists troubleshooting strategies for various symptoms.

Table 21. Symptoms With Possible Causes and Actions

Symptom
No power indicator on front
panel(s)
Local or Remote sync error Faulty modem, cable or connector. If
Cable loss exceeds modem
loss budget
Loopback test passes, but
modems will not pass data
Modem fails BERT test
when optically looped back
to itself
Modem fails BERT when
looped locally
EdgeAccess® Universal Chassis System
Possible cause(s)
No AC power
Defective modem
the modems are configured in a tail
circuit (one is externally locked and
the other is slave), verify that the
externally locked modem has a clock
on its TT (or equivalent) leads that
matches its rate switch.
Faulty fiber optic cable
Faulty fiber optic connector
Modem not configured properly
Interface cables damaged or wired
incorrectly
Faulty modem or electrical interface
Faulty modem or electrical interface
Model 2370 Model User Manual
Corrective action
Check AC power source
Replace modem
Run Loopback and BERT
tests
Replace defective cable
Polish or replace connector
Check and correct switch
and jumper settings on all
devices
Repair or replace cables
Replace faulty modem
Replace faulty modem
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