Source note · Cisco IP phone registration and TFTP and ITL and CTL
Phones download firmware and configuration files from Unified CM TFTP on UDP 69, with the transfer continuing on an ephemeral port.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- Ports
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs
- Checked
- 2026-09-24
Sources
- System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Cisco Unified Communications Manager TCP and UDP Port Usage — Cisco Systems · tier 2 current vendor documentation · Table: Signaling, Media, and Other Communication Between Phones and Cisco Unified Communications Manager, row 69 then Ephemeral / UDP
Cite this note
APA
WarmTransfer. (2026, September 24). Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-port-tftp-69. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-port-tftp-69
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-port-tftp-69,
title = {Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-port-tftp-69},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-port-tftp-69},
note = {Source note cisco-phone-registration-port-tftp-69, checked 2026-09-24}
}