Source note · Enabling mixed mode and encrypted calling in Unified CM
Cisco recommends that a trunk with SRTP Allowed checked use an encrypted TLS profile so that keys and other security information are not exposed during call negotiation.
Checked 2026-09-30
If you check the SRTP Allowed check box, we recommend that you use an encrypted TLS profile, so that keys and other security-related information does not get exposed during call negotiations.
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- SIP trunk
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 15 and SUs
- Checked
- 2026-09-30
Sources
- Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Trunk and Gateway SIP Security — Cisco Systems · tier 2 current vendor documentation · Trunk and Gateway SIP Security > SRTP Allowed note
Cite this note
APA
WarmTransfer. (2026, September 30). Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-trunk-srtp-needs-tls. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-trunk-srtp-needs-tls
BibTeX
@misc{warmtransfer-claim-cucm-secure-calling-setup-trunk-srtp-needs-tls,
title = {Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-trunk-srtp-needs-tls},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-trunk-srtp-needs-tls},
note = {Source note cucm-secure-calling-setup-trunk-srtp-needs-tls, checked 2026-09-30}
}