Source note · Cisco IP phone registration and TFTP and ITL and CTL
Cisco's registration troubleshooting technote states phones will not register if they use a secure device security profile without an LSC installed.
Checked 2026-09-24
Phones will not register if they are using a secure Device Security Profile without an LSC installed
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- Registration
- Deployment
- on-premises
- Region
- not restricted
- Release range
- as written 2017
- Checked
- 2026-09-24
Sources
- General Information for CUCM IP Phone Registration/Deregistration Troubleshooting — Cisco Systems · tier 2 current vendor documentation · Registration prerequisites / common causes discussion
Cite this note
APA
WarmTransfer. (2026, September 24). Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-secure-profile-lsc. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-secure-profile-lsc
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-secure-profile-lsc,
title = {Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-secure-profile-lsc},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-secure-profile-lsc},
note = {Source note cisco-phone-registration-secure-profile-lsc, checked 2026-09-24}
}