Cisco ONS 15454 Troubleshooting Manual page 353

Chapter 2 Alarm Troubleshooting
b.
c.
d.
Step 6 For any card, if the port is assigned, verify that the correct one is in service:
a.
b.
Use a test set to confirm that a valid signal exists on the line. Test the line as close to the receiving card
Step 7
as possible. For specific procedures to use the test set equipment, consult the manufacturer.
Ensure that the transmit and receive outputs from the DSx patch panel to your equipment are properly
Step 8
connected. For more information about cable connections and terminations, refer to the "Install Cards
and Fiber-Optic Cable" chapter in the Cisco ONS 15454 Procedure Guide.
If there is a valid signal but the alarm does not clear, replace the electrical connector on the ONS 15454.
Step 9
Step 10 If a valid electrical signal is not present and the transmitting device is operational, replace the fiber cable
connecting the transmitting device to the Ethernet port. To do this, refer to the "Install Cards and
Fiber-Optic Cable" chapter in the Cisco ONS 15454 Procedure Guide.
Repeat Steps
Step 11
If the alarm does not clear, check for any card-level alarm that could affect this port.
Step 12
If the alarm does not clear, complete the
Step 13
for the reporting card.
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 14
for more information or call Cisco TAC 1 800 553-2447 in order to report a Service-Affecting (SA)
problem.
2.7.219 LOS (DS3)
The LOS (DS3) for a DS-3 port occurs when the port on a DS3XM-6, DS3XM-12, or DS3/EC1-48 card
is in service but no signal is being received. The alarm is caused by incorrect or dirty cabling, a fiber
break, or upstream equipment failure.
November 2009
For a DS-1 card, click the Maintenance > Loopback tabs. For a DS-1 line on a DS3XM-6 or
DS3XM-12 card, click the Maintenance > DS1 tabs.
Under Admin State, click OOS,DSBLD.
Click Apply.
To confirm this physically, confirm that the LED is correctly illuminated on the physical card.
A green ACT/SBY LED indicates an active card. An amber ACT/SBY LED indicates a standby card.
To determine this virtually, double-click the card in CTC to open the card view and complete the
following substeps:
Click the Provisioning > Line tabs.
•
Verify that the Admin State column lists the port as IS.
•
If the Admin State column lists the port as OOS,MT or OOS,DSBLD, click the column and
•
choose IS. Click Apply.
If ports managed into IS admin state are not receiving signals, the LOS alarm is either
Note
raised or remains, and the port service state transitions to OOS-AU,FLT.
1 to 10 for any other port on the card that reports the LOS.
Default Severity: Critical (CR), Service-Affecting (SA)
SONET Logical Object: DS3
"Physically Replace a Traffic Card" procedure on page 2-273
Cisco ONS 15454 Troubleshooting Guide, R8.5
2.7.219 LOS (DS3)
2-159