Source note · Cisco IP phone registration and TFTP and ITL and CTL
Mixed mode is enabled from the publisher CLI with utils ctl set-cluster mixed-mode, which updates the CTL file, and reverted with utils ctl set-cluster non-secure-mode.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- CTL
- 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 chapter, enable mixed mode / revert procedures
Cite this note
APA
WarmTransfer. (2026, September 24). Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-mixed-mode-cli. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-mixed-mode-cli
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-mixed-mode-cli,
title = {Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-mixed-mode-cli},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-mixed-mode-cli},
note = {Source note cisco-phone-registration-mixed-mode-cli, checked 2026-09-24}
}