10-2
Cisco ONS 15216 EDFA2/EDFA2-A Operations Guide, R2.4
July 2004
Chapter 10 Troubleshooting
10.1 Alarm Indicators
10.1 Alarm Indicators
This section provides alarm indications, including LEDs and alarms.
10.1.1 LEDs and Office Alarms
The front panel of the ONS 15216 EDFA2 has five LEDs:
• POWER
• FAIL
• LOS
• Ethernet socket (2)
On the left side of the front panel of the ONS 15216 EDFA2 are the POWER, FAIL, and LOS alarm
LEDs. The Ethernet LEDs are located at the top left and right sides of the Ethernet LAN port. When the
module is powered on, a LED test is performed. For information about the LED test sequence, see the
“3.2.2 Rack Installation and Power Supply Connection Procedures” section on page 3-2.
The POWER, FAIL, and LOS LEDs correspond to Office Alarm conditions sent via the RJ-45 ALARM
port (if used). For additional alarm contact pinout information, see the “3.4.1 Alarm Out Relay Interface
(RJ-45)” section on page 3-5.
10.1.1.1 POWER LED (Green)
The POWER LED is green when on. This LED functions as follows:
• On: –48 VDC power supply is within allowable range. (Power Bus A and B are powered normally.)
• Off: If in duplex mode, both Power Bus A and B have failed (below –40 VDC) and remain below
the minimum turn-on supply voltage (-43 VDC). If in simplex mode, Power Bus A has failed (below
–40 VDC) and remains below the minimum turn-on supply voltage (-43 VDC). Note that the power
bus turn-off threshold has a 1.5V tolerance.
• Flashing: PWRBUSA or PWRBUSB alarm. If in duplex mode, Power Bus A, or B, or both are out
of the user-settable tolerance range. If in simplex mode, Power Bus A is out of the user-settable
tolerance range. The tolerance range is defined by PWRBUSMIN and PWRBUSMAX. The power
bus alarm threshold has a 1.5V tolerance and a 1.0V hysteresis.
See 10.1.3.4 PWRBUSA and PWRBUSB (Power Bus) Alarms, page 10-7 for information about how to
troubleshoot a Power Bus alarm.
Office Alarm: In the off condition, the first pair (0) 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.
In the flashing condition, the fourth pair (3) 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.
10.1.1.2 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:
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