System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Cisco Unified Communications Manager TCP and UDP Port Usage

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/15/systemConfig/cucm_b_system-configuration-guide-15/cucm_m_tcp-and-udp-port-usage-12-0.html

Published

2026-09-22

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco copyright; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• CAPF listens on TCP 3804 for issuing Locally Significant Certificates to IP phones. in context
• TCP 6970 on the TFTP node serves HTTP-based download of firmware and configuration files, and TCP 6971 and 6972 provide an HTTPS interface to TFTP used for secure configuration file downloads. in context
• Phone registration signaling uses TCP 2000 for SCCP, TCP 2443 for secure SCCP, TCP and UDP 5060 for SIP, and TCP 5061 for secure SIP. in context
• Phones download firmware and configuration files from Unified CM TFTP on UDP 69, with the transfer continuing on an ephemeral port. in context
• Phones reach the Trust Verification Service on Unified CM at TCP 2445. in context

Cite this source record

APA

WarmTransfer. (2026, September 22). System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Cisco Unified Communications Manager TCP and UDP Port Usage. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cucm-sysconfig-15-port-usage

BibTeX

@misc{warmtransfer-cisco-cucm-sysconfig-15-port-usage,
  title  = {System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Cisco Unified Communications Manager TCP and UDP Port Usage},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cucm-sysconfig-15-port-usage},
  note   = {Cisco Systems, accessed 2026-09-24}
}