Source note · Cisco IP phone registration and TFTP and ITL and CTL
The ITL file is created automatically when the TFTP service is activated at cluster install, and is rebuilt automatically when its content changes; no security feature has to be enabled for it.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco 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 chapter, Initial Trust List section
Cite this note
APA
WarmTransfer. (2026, September 24). Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-itl-built-auto. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-itl-built-auto
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-itl-built-auto,
title = {Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-itl-built-auto},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-itl-built-auto},
note = {Source note cisco-phone-registration-itl-built-auto, checked 2026-09-24}
}