FINAL DRAFT - CISCO CONFIDENTIAL
10-3
Cisco ONS 15216 EDFA2 Operations Guide
78-16033-01
Chapter 10 Troubleshooting
Alarm Indicators
10.1.1.2 FAIL LED (Red)
The FAIL LED is red when on. This LED indicates all alarm conditions except POWER and LOS, which
have their own LEDs. The FAIL LED functions as follows:
• Off: The gain, output power, case temperature, laser pump current, and laser pump temperature are
all within their specified ranges (or –48 VDC power has failed).
• On: GAIN, LPOUT, CTMP, LCRNT1, LCRNT2, LTMP1, and/or LTMP2 alarm. The gain, output
power, case temperature, laser pump current, and/or laser pump temperature are out of tolerance. (A
major internal failure has occurred.)
If on, access the ONS 15216 EDFA2 to determine which alarms have occurred. See the sections Optical
Alarms, Equipment Alarms, and Environmental Alarms that follow for information about how to
troubleshoot a particular alarm.
Office Alarm: In the on condition, the second pair (1) of alarm relay contacts in the RJ-45 ALARM
connector changes from a normally open to a closed condition. The LED and alarm relay automatically
reset when the alarm condition clears.
10.1.1.3 LOS LED (Yellow)
The Loss of Signal (LOS) LED is yellow when on. This LED functions as follows:
• Off: The optical input power is above the user-settable minimum threshold (or –48 VDC power has
failed).
• On: LOS alarm. The optical input power to the ONS 15216 EDFA2 is below the threshold defined
by LOSTH . The value of LOSHYST provides the hysteresis required for the alarm to clear.
If on, see the Optical Alarms section for information about how to troubleshoot the LOS alarm.
Office Alarm: In the on condition, the third pair (2) of alarm relay contacts in the RJ-45 ALARM
connector changes from a normally open condition to a closed condition. The LED and alarm relay
automatically reset when the alarm condition clears.
10.1.1.4 Ethernet Socket LEDs
Two LEDs are located at the top left and right sides of the Ethernet socket (LAN port). These LEDs are
both green. These LEDs function as follows:
• If the left Ethernet socket LED is on, the link is up.
• If the right Ethernet socket LED is on or flashing, there is Ethernet activity (traffic).
Note If the system is powered up without an Ethernet cable in the Ethernet socket (LAN port), the activity
LED (right side) turns on and remains on even if there is not Ethernet traffic. See “LAN Port Activity
LED Stays On” section on page 10-9.
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