Source note · Enabling mixed mode and encrypted calling in Unified CM

For a CA-signed SIP TLS trunk, the CA root certificate is uploaded as CallManager-trust and the CA-signed CallManager certificate is installed through OS Administration > Security > Certificate Management, on both clusters.

Checked 2026-09-30

Vendor: Cisco
Product: Cisco Unified Communications Manager
Subsystem: certificates
Deployment: on-premises
Region: not restricted
Release range: as written (2018)
Checked: 2026-09-30

Sources

Configure SIP TLS Trunk on the Communications Manager with a CA Signed Certificate — Cisco Systems · tier 2 current vendor documentation · Configure > certificate upload steps

Cite this note

APA

WarmTransfer. (2026, September 30). Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-trunk-ca-trust-upload. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-trunk-ca-trust-upload

BibTeX

@misc{warmtransfer-claim-cucm-secure-calling-setup-trunk-ca-trust-upload,
  title  = {Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-trunk-ca-trust-upload},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-trunk-ca-trust-upload},
  note   = {Source note cucm-secure-calling-setup-trunk-ca-trust-upload, checked 2026-09-30}
}

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