FINAL DRAFT - CISCO CONFIDENTIAL
3-6
CiscoONS 15216 EDFA2 Operations Guide
78-16033-01
Chapter3 Installation
Communications
Step 2 Connect the alarm cable to the alarm system contacts:
a. Cisco ONS 15454 medium-dependent interface (MDI) wire wrap pins
b. Central office (CO) alarm panel
Refer to Table3-2 on page 3-5 for information concerning alarm contacts. Refer to Alarm LEDs, page
3-6 for information on the ONS1 5216 EDFA2 alarm LEDs.
3.5.2 Alarm LEDs
The ONS 15216 EDFA2 has five LEDs:
•POWER
•FAIL
•LOS
•Ethernet socket (2)
Three of these LEDs, POWER, FAIL, and LOS, are located at the left side of the front panel of the
ONS 15216 EDFA2. The two Ethernet LEDs are located at the top left and right sides of the Ethernet
socket. When the module is powered on, an LED test is performed.

3.5.2.1 POWER LED (Green)

The POWER LED is green. This LED functions as follows:
•On: –48 VDC power is within tolerance. (Power Bus A and B are powered normally.)
•Off: No –48 VDC power or power is out of tolerance from the internal power supply. (Power Bus A
and B are not powered.)
•Flashing: Power Bus A or B (in duplex mode) has failed or is out of tolerance, or Power Bus A (in
simplex mode) is out of tolerance.
In the off condition, the first pair of alarm relay contacts in the RJ-45 connector c hanges from a normally
open condition to a closed condition. The LED and alarm automatically reset when the condition clears.
(For additional alarm contact closure information, see th e “Alarm Out Relay Interface (RJ-45)” section
on page 3-5.)

3.5.2.2 FAIL LED (Red)

The FAIL LED is red. This LED functions as follows:
•On: The laser pump bias, laser pump temperature, output power, gain, or case temperature is out of
tolerance. (A major internal failure has occurred.)
•Off: The laser pump bias or laser pump temperature is in the specified range (or no –48 VDC power
is present).
In the on condition, the second pair of alarm relay contacts in the RJ-45 connector changes from a
normally open to a closed condition. If an invalid input optical signal is applied to the
ONS 15216 EDFA2, the Fail LED is illuminated. The LED and alarm automatically reset when the
condition clears.