Source note · Troubleshooting Cisco IP phone registration
The ITL file is used for initial trust between endpoints and Unified CM and contains the TFTP, TVS and CAPF certificates plus the ITLRecovery certificate used to sign it.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- ITL
- 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 - Default Security — Cisco Systems · tier 2 current vendor documentation · Default Security > Initial Trust List
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-itl-contents. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-itl-contents
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-itl-contents,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-itl-contents},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-itl-contents},
note = {Source note cisco-phone-registration-troubleshooting-itl-contents, checked 2026-09-24}
}