Source note · SIP registration failures
In the sample trace in Cisco tech note 220670 (2023), a SIP phone's REGISTER carries Expires: 3600 and CUCM's 200 OK carries Expires: 120, so the registrar sets the shorter refresh interval.
disputed · Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- sip-phone-registration
- Deployment
- on-premises
- Region
- not restricted
- Release range
- sample trace; URL path references CUCM 11.5
- Status
- disputed
- Checked
- 2026-09-25
Sources
- Troubleshoot IP Phone Unregistration Issues in CUCM — Cisco · tier 2 current vendor documentation · trace examples in the registration process walkthrough (REGISTER and 200 OK)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP registration failures: source note sip-registration-failures-cucm-expires-3600-120. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-registration-failures-cucm-expires-3600-120
BibTeX
@misc{warmtransfer-claim-sip-registration-failures-cucm-expires-3600-120,
title = {SIP registration failures: source note sip-registration-failures-cucm-expires-3600-120},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-registration-failures-cucm-expires-3600-120},
note = {Source note sip-registration-failures-cucm-expires-3600-120, checked 2026-09-25}
}