Source note · Enabling mixed mode and encrypted calling in Unified CM
When phones no longer trust the ITL signer, utils itl reset localkey re-signs the ITL file with the CallManager key; show itl confirms the reset, then phones are reset from System > Enterprise Parameters and the TFTP service is restarted.
Checked 2026-09-30
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- ITL recovery
- 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 - Default Security — Cisco Systems · tier 2 current vendor documentation · Default Security > Bulk reset of the ITL file
Cite this note
APA
WarmTransfer. (2026, September 30). Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-itl-reset-localkey. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-itl-reset-localkey
BibTeX
@misc{warmtransfer-claim-cucm-secure-calling-setup-itl-reset-localkey,
title = {Enabling mixed mode and encrypted calling in Unified CM: source note cucm-secure-calling-setup-itl-reset-localkey},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-secure-calling-setup-itl-reset-localkey},
note = {Source note cucm-secure-calling-setup-itl-reset-localkey, checked 2026-09-30}
}