Installation guide

Operafone IP Executive Installation Guide

4.4 Port Forwarding

In the Office location, incoming VoIP calls to the Opera system are routed from the Internet through a

gateway modem/router on the LAN to the Opera system. This modem/router must be configured to

direct this traffic to the local IP address of the Opera system on the LAN.

Traffic on the following three ports must be sent to the local IP address of the Opera system:

Port 5075 for TCP packets (allows registration and signaling)

Port 50000 for UDP packets (for speech)

Port 50001 for UDP packets (for speech)

In the case of the Opera 20IP/4IP, UDP packets on ports 50000 to 50031 of the Gateway must be port

forwarded to the local IP address of the Opera system. Also TCP packets on port 5075, as above. And

for Browser access packets on port 7000 must be forwarded to port 80 of the system.

4.4.1 Example: How to Configure Port Forwarding on the Netopia Modem Router Cayman 3346

This section describes how to configure port forwarding for Voice over IP traffic on the Netopia Modem

Router Cayman 3346.

Voice traffic coming from the Internet to the Opera system in the Office location is routed through the

Netopia ADSL Modem router as shown in the diagram below. This device implements a firewall to

protect the internal LAN from intrusion from the Internet. The firewall must be opened up to allow voice

traffic from the Internet to pass through and it must be configured to forward this voice traffic to the

internal IP address of the Opera system.

Office

Home

Netopia ADSL

Modem/ Router

Opera

system

Internet

ADSL Modem

Operafone IP

Executive

LAN