Source note · Troubleshooting Cisco IP phone registration
On an 8800 Series phone, Admin Settings > Reset Settings > Security Settings deletes only the CTL file from the phone.
Checked 2026-09-24
Deletes only the CTL file from the phone
- Vendor
- Cisco
- Product
- IP Phone 8800 Series
- Subsystem
- reset
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager - Maintenance — Cisco Systems · tier 2 current vendor documentation · Maintenance > Basic Reset > Remove CTL File
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-reset-security. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-reset-security
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-reset-security,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-reset-security},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-reset-security},
note = {Source note cisco-phone-registration-troubleshooting-reset-security, checked 2026-09-24}
}