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160 - 165 IP Telephony v1.0 TCP and UDP Port Numbers Copyright © 2005, Cisco Systems, Inc.
Protocol
Remote
Source
Port
CallManager
Destination
Port
CallManager
Source Port
Remote
Device
Destination
Port
Remote
Devices
Notes
OSI (DAP,
DSP, DISP)
TCP or UDP
120
DCD Directory
NTP UDP 123
WINS UDP 137-139 WINS Server
Windows
Internet Name
Service
SNMP UDP 161
SNMP Trap UDP 162
LDAP TCP 389 TCP 389
Directory
Services
When
integrated with
Corporate
Directory
HTTPS /
SSL
TCP 443
SMB TCP 445 TCP 445
CallManagers
in the same
cluster
Syslog TCP 514 UDP 514 Syslog service
RMI
TCP 1099-
1129
RMI Service.
Attendant
Console
MS SQL TCP 1433 TCP 1433
CallManagers
in the same
cluster
H.323 RAS UDP 1719
Gatekeeper
RAS
CallManager
prior to 3.3.
Cisco
Conference
Connection
H.323 RAS
UDP 1024-
4999
UDP 1719
Gatekeeper
RAS
CallManager
3.3
H.323 H.225 TCP 1720 TCP 1720
H.323
Gateways /
Anonymous
Device Cisco
Conference
Connection /
Non-
Gatekeeper
Controlled
H.323 Trunk
H.323
H.225/ICT
TCP 1024-
4999
CallManager
Gatekeeper
Controlled
H.323 Trunks
CallManager
3.3
H.323 H.245
TCP 1024-
4999
TCP 1024-
4999
CallManager
H.323
Gateways /
Anonymous
Device / H.323
Trunks