Source note · Cisco IP phone registration and TFTP and ITL and CTL
Cisco's SBD technote states there is no Cisco-provided method to delete the ITL from all phones remotely; deletion is manual per phone, or a factory reset where the phone's settings access is restricted.
Checked 2026-09-24
There is currently no method to delete all ITLs from a phone remotely provided by Cisco.
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- ITL
- Deployment
- on-premises
- Region
- not restricted
- Release range
- as of technote update 2023-07-14
- Checked
- 2026-09-24
Sources
- Understand CUCM Security By Default and ITL Operation and Troubleshooting — Cisco Systems · tier 2 current vendor documentation · FAQ: Can I easily delete the ITL file from all phones once the CallManager.pem is lost?
Cite this note
APA
WarmTransfer. (2026, September 24). Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-no-remote-itl-delete. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-no-remote-itl-delete
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-no-remote-itl-delete,
title = {Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-no-remote-itl-delete},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-no-remote-itl-delete},
note = {Source note cisco-phone-registration-no-remote-itl-delete, checked 2026-09-24}
}