User's Manual
Appendix B-Active Alarms
Polycom, Inc. B-11
SIP TLS: Registration server not 
responding
This alarm is displayed when the Collaboration Server does not receive a 
response from the OCS to the registration request in the expected time frame. 
Possible causes are: 
• The Collaboration Server FQDN name is not defined in the OCS pool, or is 
defined incorrectly.
• The time frame for the expected response was too short and it will be 
updated with the next data refresh. The alarm may be cleared 
automatically the next time the data is refreshed. 
• The Collaboration Server FQDN name is not defined in the DNS server. 
Ping the DNS using the Collaboration Server FQDN name to ensure that 
the Collaboration Server is correctly registered to the DNS.
SIP TLS: Registration transport error This alarm indicates that the communication with the SIP server cannot be 
established. Possible causes are: 
• Incorrect IP address of the SIP server
• The SIP server listening port is other than the one defined in the system
• The OCS services are stopped
Software upgrade in component
SSH is enabled
SWITCH not responding  Check the Switch card.
System Cards MPM Plus mode are not 
supported in Event mode
System configuration changed. Please 
reset the MCU
System Configuration modified System configuration flags were modified.
Reset the MCU.
System resources of Audio ports usage 
has exceeded Port Gauge threshold
System resources of Video ports usage 
has exceeded Port Gauge threshold
System resources usage has exceeded 
Port Gauge threshold
Temperature Level - Critical Possible explanations:
• Temperature has reached a critical level. Card or if critical system element 
the MCU will shut down.
Temperature Level - Major Possible explanations:
• Temperature has reached a problematic level and requires attention.
The Log file system is disabled because 
of high system CPU usage
The MCCF channel is not connected
The software contains patch(es) The software contains patch(es).
Table B-1  Active Alarms (Continued)
Alarm Code Alarm Description










