Source note · Cisco IP phone registration and TFTP and ITL and CTL
The Trust Verification Service runs on Unified CM nodes and authenticates certificates on behalf of the phone, so the phone only needs to trust TVS instead of holding every trusted certificate.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- TVS
- 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 chapter, Trust Verification Service section
Cite this note
APA
WarmTransfer. (2026, September 24). Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-tvs-role. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-tvs-role
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-tvs-role,
title = {Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-tvs-role},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-tvs-role},
note = {Source note cisco-phone-registration-tvs-role, checked 2026-09-24}
}