Cisco GS7000 User Manual

Appendix B
Enhanced Digital Return Multiplexing Applications
196
Follow the steps in the table below to troubleshoot the transmitter module.
Symptom
Possible Cause
Possible Solutions
No optical signal output
Laser temperature could be
too high or low.
Allow up to one minute after
power is ON for the
temperature to stabilize.
If still no output, contact the
Cisco Technical Service Center
for assistance.
Laser could be faulty.
Contact the Cisco Technical
Service Center for assistance.
Automatic power control
circuit failure.
Contact the Cisco Technical
Service Center for assistance.
Damaged fiber.
Contact the Cisco Technical
Service Center for assistance.
Symptom
Possible Cause
Possible Solutions
No optical signal output
(cont'd)
One or more power supply
voltages are out of
specification.
Check the power supply for
proper operation.
No AC at receptacle.
Check the receptacle for AC
power.
Blown fuse on the power
supply.
Check the power supply fuse
and replace as necessary.
Faulty module.
Contact the Cisco Technical
Service Center for assistance.

Cisco GS7000 Specifications

General

Brand	Cisco
Model	GS7000
Category	Network Hardware
Language	English