Source note · Troubleshooting Cisco IP phone registration
When the CallManager certificate is regenerated, phones cannot verify the newly signed files directly and contact TVS to authenticate the new certificate before accepting the updated ITL.
Checked 2026-09-24
- 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 > certificate regeneration
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-cert-regen-tvs. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-cert-regen-tvs
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-cert-regen-tvs,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-cert-regen-tvs},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-cert-regen-tvs},
note = {Source note cisco-phone-registration-troubleshooting-cert-regen-tvs, checked 2026-09-24}
}