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159 - 165 IP Telephony v1.0 TCP and UDP Port Numbers Copyright © 2005, Cisco Systems, Inc.
TCP and UDP Port Numbers
This document lists real important TCP/UDP port numbers related to voice QoS.
TCP or UDP Port Number Purpose
TCP 2000 to 2002 Skinny (CM Encore)
TCP 11000 to 11999 H.323/H.245 Standard Connect ports
TCP 1720 H.323/H.245 Fast Connect or H.323/H.225 ports
TCP 1719 H.323/H.225
UDP 1719 Gatekeeper RAS
TCP 8001-8002 ICCP (CM Encore)
UDP 2427 MGCP (CM Encore)
TCP 2428 MGCP (CM Encore)
UDP 5060 SIP
TCP 5060 SIP
UDP 16384 to 32767 RTCP
Protocol
Remote
Source
Port
CallManager
Destination
Port
CallManager
Source Port
Remote
Device
Destination
Port
Remote
Devices
Notes
DTC TCP 135
CallManagers
in the same
cluster
SSH TCP 22
Secure Shell
Client
Telnet TCP 23 Telnet Client
DNS UDP 53 DNS Servers
DHCP UDP 68 UDP 67 DHCP Server
DHCP UDP 68 UDP 67 DHCP Client
TFTP UDP 69
Dynamic Ports
used after
initial connect
HTTP TCP 80
Administrator /
User Web
browsers
CCMAdmin
and CCMUser
pages