Specifications

6-2
Cisco ONS 15216 EDFA Operation Guide
78-12818-01
Chapter 6 Troubleshooting
Basic Diagnosis
Basic Diagnosis
When a problem occurs over the network, the following three basic diagnostic procedures are designed
to help you determine if the ONS 15216 EDFA1 is the source of the problem. If the ONS 15216 EDFA1
is the source of the problem, follow the directions in the “Troubleshooting Commands” section on
page 6-3 to clear the alarms and if necessary reprovision the ONS 15216 EDFA1 for proper operation.
Verify Optical Input Power
First, measure the optical input power using the following command or test equipment:
• STAT Command (Troubleshooting Commands, page 6-3)
• Optical Power Meter (if necessary)
• Optical Spectrum Analyzer (if necessary)
When the ONS 15216 EDFA1 is operating in constant gain mode, the total optical input power must be
less than or equal to -6dBm.
If optical input power is out of the specified range for proper ONS 15216 EDFA1 operation, the
craftsperson must investigate and diagnose the fault.
Verify Optical Output Power
Second, measure the ONS 15216 EDFA1 optical output power using the following command or test
equipment:
• STAT Command (Troubleshooting Commands, page 6-3)
• Optical power meter, connected to the ONS 15216 EDFA1 output port (if necessary)
• Optical spectrum analyzer, connected to the ONS 15216 EDFA1 output port (if necessary)
When operating in constant gain mode, the ONS 15216 EDFA1 delivers 23
± 1.25dB gain above the input signal at the output port. If this is not the case, see the “Troubleshooting
Commands” section on page 6-3.
Verify Alarm Settings
Measure, clear, and/or revise alarm settings using the following three commands:
• ALARM D Command - this command displays the current alarm status
• ALARM C Command- this command clears the alarm count
• SET_LOSTH Command - this command can set, enable, disable, or display the loss-of-signal
threshold
For more details. see the “Troubleshooting Commands” section on page 6-3.
Contact Technical Support if the fault condition is not cleared after you have reviewed and cleared the
alrms and/or reprovisioned the loss-of-input signal threshold.