CUCM Phone Deregistration Event

[mfreedman]

I'm trying to determine how to track if a phone deregisters from CUCM 11.X. What the alert or event might be? Is there a trigger that is sent that can be captured?

Thanks in advance

[dstaudt]

I can think of a few mechanisms, depending on use-case/scenario:

- TAPI/JTAPI these APIs provide real-time call and phone events, including de-registration.  Complexity and scalability are considerations, as continuously monitoring a large number of phones can have performance implications
https://developer.cisco.com/site/jtapi/

https://developer.cisco.com/site/tapi/

- Syslog I seem to recall that there is a specific syslog event generated when a phone de-registers.  You may need to experiment and look at a few events to find the best way to identify the event and device

- SNMP there is a dynamic table in the CUCM SNMP MIB that provides IP address and registration info for all phones.  Walking this periodically is a fairly slow/expensive process - there is an accompanying table of just phones that have changed registration status recently that would be better for polling (once a minute or maybe 15 sec)

- Serviceability SOAP Risport API this SOAP API provides info analogous to the SNMP info - it does not offer a 'recently changed' collection, though it does provide a 'state' mechanism to detect if any phones have changed registration status since the last query

https://developer.cisco.com/docs/sxml/#!risport70-api-reference