Source note · Troubleshooting Cisco IP phone registration
Some phones do not pick up the latest ITL file and keep the old one when ITL files are updated, for example on renewal of the CallManager certificate.
Checked 2026-09-24
Some phones do not get the latest ITL file and retain the old ones when the ITL files are updated (like the renewal of CM certificates).
- 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 > Certificate Management Changes for ITLRecovery Certificate
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-itl-stale. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-itl-stale
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-itl-stale,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-itl-stale},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-itl-stale},
note = {Source note cisco-phone-registration-troubleshooting-itl-stale, checked 2026-09-24}
}