Source note · Cisco IP phone registration and TFTP and ITL and CTL
The CallManager certificate carried in the ITL lets the phone authenticate the ITL file signature and the phone configuration file signature.
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, ITL records list (CallManager certificate)
Cite this note
APA
WarmTransfer. (2026, September 24). Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-itl-callmanager-cert. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-itl-callmanager-cert
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-itl-callmanager-cert,
title = {Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-itl-callmanager-cert},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-itl-callmanager-cert},
note = {Source note cisco-phone-registration-itl-callmanager-cert, checked 2026-09-24}
}