Source note · Cisco IP phone registration and TFTP and ITL and CTL
CAPF listens on TCP 3804 for issuing Locally Significant Certificates to IP phones.
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 3804 / TCP
Cite this note
APA
WarmTransfer. (2026, September 24). Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-port-capf-3804. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-port-capf-3804
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-port-capf-3804,
title = {Cisco IP phone registration and TFTP and ITL and CTL: source note cisco-phone-registration-port-capf-3804},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-port-capf-3804},
note = {Source note cisco-phone-registration-port-capf-3804, checked 2026-09-24}
}