Cisco ONS 15310-MA Troubleshooting Manual page 99

Chapter 2 Alarm Troubleshooting
Always use the supplied electrostatic discharge wristband when working with a powered
Caution
ONS 15310-MA SDH.
If the cabling is good, verify that the correct port is in service by completing the following steps:
Step 2
a.
b.
c.
d.
e.
If the correct port is in service, clean the fiber according to site practice. If no site practice exists,
Step 3
complete the procedure in the "Maintain the Node" chapter in the Cisco ONS15310-MA SDH Procedure
Guide.
If the alarm does not clear, verify that the power level of the optical signal is within the STM1 or STM4
Step 4
port receiver specifications. The "Install Hardware" chapter in the Cisco ONS15310-MA SDH Procedure
Guide lists these specifications for each STM-N port.
Step 5 If the optical power level is within specifications, use an optical test set to verify that a valid signal exists
on the line. For specific procedures to use the test set equipment, consult the manufacturer. Test the line
as close to the receiving card as possible.
Repeat Steps
Step 6
If the alarm does not clear, look for and troubleshoot any other alarm that could identify the source of
Step 7
the problem.
If the alarm does not clear, log into the Technical Support Website at
Step 8
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447) in order to report a Service-Affecting (SA) problem.
2.7.139 LO-TXPOWER
The Equipment Low Transmit Power alarm is an indicator for STM port transmitted optical signal power.
LO-TXPOWER occurs when the measured optical power of the transmitted signal falls under the
threshold. The threshold value is user-provisionable.
78-18663-01
Confirm that the green ACT LED is on.
To determine whether the STM1 or STM4 port is in service, double-click the controller card (ONS
15310-MA SDH) in CTC to display the card view.
Click the Provisioning > Optical > Line tabs.
Verify that the Admin State column lists the port as unlocked.
If the Admin State column lists the port as locked, maintenance or locked, disabled, click the column
and choose unlocked. Click Apply.
If ports managed into unlocked administrative state are not receiving signals, the LOS alarm
Note
is either raised or remains, and the port service state transitions to unlocked-disabled,FLT.
1 to 5 for any other port on the card reporting the LOS (STM-N).
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
SDH Logical Objects: EQPT, STM
DWDM Logical Object: PPM
Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
Alarm Procedures
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