In a SIP Trunk Security Profile, Device Security Mode Encrypted opens a TLS connection that uses AES128/SHA for signaling.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- SIP Trunk Security Profile
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs
- Checked
- 2026-10-02
Sources
- Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Trunk and Gateway SIP Security — Cisco Systems · tier 2 current vendor documentation · SIP Trunk Security Profile Settings > Device Security Mode
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-secmode-encrypted. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-sip-trunk-no-service-troubleshooting-secmode-encrypted
BibTeX
@misc{warmtransfer-claim-cucm-sip-trunk-no-service-troubleshooting-secmode-encrypted,
title = {Troubleshooting Unified CM SIP trunks that show No Service: source note cucm-sip-trunk-no-service-troubleshooting-secmode-encrypted},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-sip-trunk-no-service-troubleshooting-secmode-encrypted},
note = {Source note cucm-sip-trunk-no-service-troubleshooting-secmode-encrypted, checked 2026-10-02}
}