Source note · Troubleshooting Cisco IP phone registration
Non-secure mode is the default Unified CM cluster security mode after installation and provides no secure signalling or media; mixed mode supports both secure and non-secure endpoints.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- cluster security mode
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs
- Checked
- 2026-09-24
Sources
- Security Guide for Cisco Unified Communications Manager, Release 15 and SUs - Security Modes — Cisco Systems · tier 2 current vendor documentation · Security Modes > Non-Secure Mode; Mixed Mode
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-nonsecure-default. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-nonsecure-default
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-nonsecure-default,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-nonsecure-default},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-nonsecure-default},
note = {Source note cisco-phone-registration-troubleshooting-nonsecure-default, checked 2026-09-24}
}