Source note · Troubleshooting Cisco IP phone registration
Where the ITL must be removed from a phone that no longer trusts the cluster, the phone's buttons must be pressed manually on the phone to delete it.
Checked 2026-09-24
the phone buttons must be pushed manually on the phone in order to delete the ITL file
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- ITL
- Deployment
- on-premises
- Region
- not restricted
- Release range
- CUCM 8.0 and later
- Checked
- 2026-09-24
Sources
- Understand CUCM Security By Default and ITL Operation and Troubleshooting — Cisco Systems · tier 2 current vendor documentation · Understand CUCM Security By Default and ITL Operation and Troubleshooting > ITL deletion
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-itl-manual. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-itl-manual
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-itl-manual,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-itl-manual},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-itl-manual},
note = {Source note cisco-phone-registration-troubleshooting-itl-manual, checked 2026-09-24}
}