Source note · Troubleshooting Cisco IP phone registration
When the phone is configured with host names, DNS must hold entries for the TFTP server and Unified CM, and DNS should be configured for reverse lookups.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- IP Phone 8800 Series
- Subsystem
- DNS
- 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 - Troubleshooting — Cisco Systems · tier 2 current vendor documentation · Troubleshooting > Verify DNS Settings
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-dns-cname. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-dns-cname
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-dns-cname,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-dns-cname},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-dns-cname},
note = {Source note cisco-phone-registration-troubleshooting-dns-cname, checked 2026-09-24}
}