In mixed mode Unified CM uses TLS for signaling and SRTP for media.

Checked 2026-09-30

Vendor
Cisco
Product
Cisco Unified Communications Manager
Subsystem
security modes
Deployment
on-premises
Region
not restricted
Release range
15 and SUs
Checked
2026-09-30

Sources

Cite this note

APA

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

BibTeX

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

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