Source note · SIP registration failures
For CUCM EndPointUnregistered alarms, Cisco advises matching the alarm's reason number, MAC address and timestamp, and looking up reason codes in the system error message reference.
Checked 2026-09-25
You must focus on the reason number of the error message, mac address and timestamp to match the alert.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- alarms
- Deployment
- on-premises
- Region
- not restricted
- Release range
- document dated 2023-07-28
- Checked
- 2026-09-25
Sources
- Troubleshoot IP Phone Unregistration Issues in CUCM — Cisco · tier 2 current vendor documentation · section 'EndPointUnregistered System Error message explanation'
Cite this note
APA
WarmTransfer. (2026, September 25). SIP registration failures: source note sip-registration-failures-cucm-reason-number. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-registration-failures-cucm-reason-number
BibTeX
@misc{warmtransfer-claim-sip-registration-failures-cucm-reason-number,
title = {SIP registration failures: source note sip-registration-failures-cucm-reason-number},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-registration-failures-cucm-reason-number},
note = {Source note sip-registration-failures-cucm-reason-number, checked 2026-09-25}
}