Cisco ONS 15454 Troubleshooting Manual page 279

Chapter 2 Alarm Troubleshooting
The Line DCC (LDCC) Termination Failure alarm occurs when the ONS 15454 loses its line data
communications channel (LDCC) termination. In DWDM configurations, for example, the OSCM card
can raise this alarm on its OC-3 line overhead.
The LDCC consists of nine bytes, D4 through D12, in the SONET overhead. The bytes convey
information about OAM&P. The ONS 15454 uses the LDCCs on the SONET line layer to communicate
network management information.
Warning On the OC-192 card, the laser is on when the card is booted and the safety key is in the on position
(labeled 1). The port does not have to be in service for the laser to be on. The laser is off when the
safety key is off (labeled 0). Statement 293
Invisible laser radiation could be emitted from the end of the unterminated fiber cable or connector.
Warning
Do not stare into the beam directly with optical instruments. Viewing the laser output with certain
optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of
100 mm could pose an eye hazard. Statement 1056
Warning Use of controls, adjustments, or performing procedures other than those specified could result in
hazardous radiation exposure. Statement 1057
If a circuit shows a partial status when the
Note
the logical circuit is in place. The circuit is able to carry traffic when the DCC termination issue is
resolved. You do not need to delete the circuit when troubleshooting this alarm.
Clear the EOC-L Alarm
Complete the
Step 1
Step 2 If the alarm has not cleared, call Cisco TAC 1 800 553-2447. If the Cisco TAC technician tells you to
reseat the card, complete the
on page
the
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SONET Logical Object: OCN
DWDM Logical Object: TRUNK
"Clear the EOC Alarm" procedure on page
"Remove and Reinsert (Reseat) the Standby TCC2/TCC2P Card" procedure
2-272. If the Cisco TAC technician tells you to remove the card and reinstall a new one, follow
"Physically Replace a Traffic Card" procedure on page
Default Severity: Critical (CR), Service-Affecting (SA)
SONET Logical Objects: AICI-AEP, AICI-AIE, EQPT
DWDM Logical Object: PPM
"EOC" alarm on page 2-82, or EOC-L is raised, it occurs when
2-83.
2-273.
Cisco ONS 15454 Troubleshooting Guide, R8.5
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