For a CA-signed SIP TLS trunk, Cisco's example uploads the root and subordinate CA certificates as CallManager-trust under Cisco Unified OS Administration > Security > Certificate Management > Upload Certificate/Certificate Chain.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- certificate management
- Deployment
- on-premises
- Region
- not restricted
- Release range
- CUCM 9.1(2) and 10.5(2) per technote
- Checked
- 2026-10-02
Sources
- Configure SIP TLS Trunk on the Communications Manager with a CA Signed Certificate — Cisco Systems · tier 2 current vendor documentation · Configure > upload CA certificates as CallManager-trust
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting Unified CM SIP trunks that show No Service: source note cucm-sip-trunk-no-service-troubleshooting-tls-ca-trust. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-sip-trunk-no-service-troubleshooting-tls-ca-trust
BibTeX
@misc{warmtransfer-claim-cucm-sip-trunk-no-service-troubleshooting-tls-ca-trust,
title = {Troubleshooting Unified CM SIP trunks that show No Service: source note cucm-sip-trunk-no-service-troubleshooting-tls-ca-trust},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-sip-trunk-no-service-troubleshooting-tls-ca-trust},
note = {Source note cucm-sip-trunk-no-service-troubleshooting-tls-ca-trust, checked 2026-10-02}
}