Specifications
1-81
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 1 Alarm Troubleshooting
b. Verify that the State column lists the port as ACTIVE.
c. If the State column lists the port as INCOMPLETE. If INCOMPLETE does not change after a full
initialization, log on to http://www.cisco.com/tac for more information or call the Cisco Technical
Assistance Center to report a service-affecting problem (1-877-323-7368).
Step 9 After you determine that the port is active, verify the signal source received by the card reporting the
alarm.
Step 10 Check the far-end OC-N card that provides STS payload to the card.
Step 11 Verify the far-end cross-connect between the OC-N card and the DS-N card.
Step 12 Clean the far-end optical fiber:
a. Clean the fiber according to local site practice.
b. If no local practice exists, use a CLETOP Real-Type or equivalent fiber-optic cleaner and follow the
instructions accompanying the product.
1.3.123 UNEQ-V
• Major, Service affecting
An Unequipped VT alarm indicates that the node is receiving SONET path overhead with bits 5, 6, and
7 of the V5 overhead byte all set to zeroes. The source of the problem is the node that is transmitting the
VT-level signal into the node reporting the UNEQ-P. The problem node is the next node upstream that
processes the signal at the VT level.
The V in UNEQ-V indicates that the failure has occurred at the VT layer. The VT (electrical) layer is
created when the SONET signal is broken down into an electrical signal, for example, when an optical
signal comes into an ONS 15454, the optical signal is demultiplexed and one of the channels separated
from the optical signal is cross connected into an ONS 15454 cross-connect (XC/XCVT/XC10G) card
and the corresponding DS-N card.
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 electrostatic discharge wristband when working with a powered ONS 15454.
Plug the wristband cable into the ESD jack located on the lower-right outside edge of the shelf
assembly.
Procedure: Clear the UNEQ-V Alarm on the DS-1 and DS3XM-6 Card
Step 1 Verify that all circuits terminating in the reporting card are active:
a. Click the Circuits tab.
b. Verify that the State column lists the port as ACTIVE.
c. If the State column lists the port as INCOMPLETE. If INCOMPLETE does not change after full
initialization, log on to http://www.cisco.com/tac for more information or call the Cisco Technical
Assistance Center to report a service-affecting problem (1-877-323-7368).