Eoc - Cisco ONS 15327 User Documentation

Chapter 14 Alarm Troubleshooting
If the alarm does not clear after the user verifies that the provisioned line type matches the expected
Step 6
incoming signal, use a test set to verify that the actual signal coming into the ONS 15327 matches the
expected incoming signal.

14.4.35 EOC

•
The termination failure SDCC alarm means the ONS 15327 has lost its DCC. The DCC is three bytes,
D1 through D3, in the SONET overhead. The bytes convey information about Operation,
Administration, Maintenance, and Provisioning (OAM&P.) The ONS 15327 uses the SDCC to
communicate network management information.
Warning Invisible laser radiation may be emitted from the aperture ports of the single-mode, fiber-optic
modules when no cable is connected. Avoid exposure and do not stare into open apertures.
Caution Always use the supplied ESD wristband when working with a powered ONS 15327. Plug the wristband
cable into the ESD jack located on the lower-right outside edge of the shelf assembly.
Procedure: Clear the EOC Alarm on an OC-N Card
If an LOS alarm is also reported, first resolve the LOS alarm by following the troubleshooting procedure
Step 1
given for that alarm.
On the node reporting the alarm, check the physical connections from the cards to the fiber- optic cables
Step 2
that are configured to carry DCC traffic.
Verify that both ends of the fiber span have in-service ports by checking that the ACT LED on each OC-N
Step 3
card is illuminated.
Verify that the DCC is provisioned for the ports at both ends of the fiber span.
Step 4
a.
b.
c.
d.
e.
f.
Step 5 Verify that the OC-N port is active and in service:
a.
b.
c.
June 2002
Major, Non-Service-Affecting
Under the node view, click the Provisioning > SONET DCC tabs.
If the slot and port are listed under SDCC Terminations, the DCC is provisioned.
If the slot and port are not listed under the SDCC Terminations, click Create.
Click the OC-N card that links to the adjacent node.
Click OK.
Repeat Steps a to e at the adjacent nodes.
Confirm that the OC-N card shows a green LED by viewing CTC or viewing the physical card.
A green LED indicates an Active card. A yellow LED indicates a Standby card.
To determine whether or not the OC-N port is in In Service, double-click the card in CTC to display
the card-level view.
Click the Provisioning > Line tabs.
Cisco ONS 15327 User Documentation, R3.3
Alarm Procedures
14-31