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Technical Reference: Cisco Contact Center Product Port Utilization Guide

LDAP

TCP 8404

RTP

UDP 
16384– 
32767

UDP

16384–

32767

Voice Media

IPCC Enterprise 
VRU CTI 
(ICM/IVR message 
interface)

TCP 5000

Between ISN 

Application Sever and 

IPCC Enterprise/ICM 

VRU PG

Port number is 
configurable

ISN Alarm 
Forwarder

TCP 8163

Between the ISN 

Application server and 

the ISN Voice Browser

Proprietary protocol 
for receiving ISN 
Application server 
alarms

ICM Standalone 
Distributed 
Diagnostics 
Service Node 
(SDDSN)

TCP 40080

Between the ISN 

Application server and 

the ISN Voice Browser

Proprietary protocol 
for sending ISN 
alarms to SDDSN

Cisco Internet Service Node Port Utilization (Continued)