Source note · SIP registration failures
Cisco tech note 212143 says a phone's keepalive REGISTER to its secondary CUCM server has an Expires value of 0.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- sip-phone-registration
- Deployment
- on-premises
- Region
- not restricted
- Release range
- not stated; document dated 2017-09-22
- Checked
- 2026-09-25
Sources
- General Information for CUCM IP Phone Registration/Deregistration Troubleshooting — Cisco Systems · tier 2 current vendor documentation · Expires field paragraph (secondary CallManager sentence)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP registration failures: source note sip-registration-failures-cucm-secondary-expires-0. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-registration-failures-cucm-secondary-expires-0
BibTeX
@misc{warmtransfer-claim-sip-registration-failures-cucm-secondary-expires-0,
title = {SIP registration failures: source note sip-registration-failures-cucm-secondary-expires-0},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-registration-failures-cucm-secondary-expires-0},
note = {Source note sip-registration-failures-cucm-secondary-expires-0, checked 2026-09-25}
}