Cisco ONS 15454 Troubleshooting Manual page 236

2.7.16 APSCM
An APS Inconsistent alarm means that an inconsistent APS byte is present. The SONET overhead
contains K1/K2 APS bytes that notify receiving equipment, such as the ONS 15454, to switch the
SONET signal from a working to a protect path when necessary. An inconsistent APS code occurs when
three consecutive frames contain nonidentical APS bytes, which in turn give the receiving equipment
conflicting commands about switching.
Clear the APSCINCON Alarm
Look for other alarms, especially the
Step 1
page
If an APSINCON alarm occurs with no other alarms, log into the Technical Support Website at
Step 2
http://www.cisco.com/techsupport for more information or call Cisco TAC 1 800 553-2447.
2.7.16 APSCM
The APS Channel Mismatch alarm occurs when the ONS 15454 expects a working channel but receives
a protect channel. In many cases, the working and protect channels are crossed and the protect channel
is active. If the fibers are crossed and the working line is active, the alarm does not occur. The APSCM
alarm occurs only on the ONS 15454 when bidirectional protection is used on OC-N cards in a 1+1
protection group configuration. The APSCM alarm does not occur in an optimized 1+1 protection
configuration.
On the ONS 15454 OC-192 card, the laser is on when the card is booted and the safety key is in the on
Warning
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
Warning Invisible laser radiation could be emitted from the end of the unterminated fiber cable or connector.
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
Use of controls, adjustments, or performing procedures other than those specified could result in
Warning
hazardous radiation exposure. Statement 1057
Clear the APSCM Alarm
Always use the supplied electrostatic discharge wristband when working with a powered ONS 15454.
Caution
Plug the wristband cable into the ESD jack located on the lower-right edge of the shelf assembly.
Cisco ONS 15454 Troubleshooting Guide, R8.5
2-42
2-151, or the "AIS" condition on page
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
SONET Logical Object: OCN
"LOS (OCN)" alarm on page
2-36. Clearing these alarms clears the APSCINCON alarm.
Chapter 2 Alarm Troubleshooting
2-164, the "LOF (OCN)" alarm on
November 2009