Source note · Calls that drop after about 30 seconds
The 2015 Cisco technote gives the CallManager (Unified CM) default SIP Session Expires Timer as 1800 seconds, which puts refreshes at about 900 seconds (15 minutes).
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- SIP profile / session timer
- Deployment
- on-premises
- Region
- not restricted
- Release range
- as documented 2015-07-23; current releases unverified
- Checked
- 2026-09-25
Sources
- Troubleshoot Call Failures on TC Endpoints Registered to Cisco CallManager — Cisco · tier 2 current vendor documentation · Section 'Problem: SIP Call Drop after 15 Minutes'
Cite this note
APA
WarmTransfer. (2026, September 25). Calls that drop after about 30 seconds: source note sip-calls-drop-30-seconds-cucm-session-expires-default. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-calls-drop-30-seconds-cucm-session-expires-default
BibTeX
@misc{warmtransfer-claim-sip-calls-drop-30-seconds-cucm-session-expires-default,
title = {Calls that drop after about 30 seconds: source note sip-calls-drop-30-seconds-cucm-session-expires-default},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-calls-drop-30-seconds-cucm-session-expires-default},
note = {Source note sip-calls-drop-30-seconds-cucm-session-expires-default, checked 2026-09-25}
}