Source note · Cisco IP phone registration and TFTP and ITL and CTL
The 8800 status message Phone failed to register. Cert key size is not FIPS compliant indicates an RSA certificate shorter than 2048 bits that must be replaced.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco IP Phone 8800 Series
- Subsystem
- Status messages
- 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 - Monitoring Phone Systems — Cisco Systems · tier 2 current vendor documentation · Monitoring Phone Systems, Status Messages table, row Phone failed to register. Cert key size is not FIPS compliant
Cite this note
APA
WarmTransfer. (2026, September 24). Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-msg-fips-key-size. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-msg-fips-key-size
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-msg-fips-key-size,
title = {Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-msg-fips-key-size},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-msg-fips-key-size},
note = {Source note cisco-phone-registration-msg-fips-key-size, checked 2026-09-24}
}