Source note · Troubleshooting Cisco IP phone registration
A phone security profile's Device Security Mode is Non Secure (a TCP connection to Unified CM), Authenticated (TLS with NULL/SHA for signalling) or Encrypted (adds signalling encryption), and secure modes use TLS as the transport.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- phone security profile
- 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 - Phone Security — Cisco Systems · tier 2 current vendor documentation · Phone Security > phone security profile settings > Device Security Mode; Transport Type
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-profile-modes. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-profile-modes
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-profile-modes,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-profile-modes},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-profile-modes},
note = {Source note cisco-phone-registration-troubleshooting-profile-modes, checked 2026-09-24}
}