AltiGen comm ACM 5.1 manual Setup, For the Corporate LAN, For the Remote IP Phone Using NAT

Chapter 24: Network Configuration Guidelines for VoIP

Figure 1. AltiWare behind NAT

Figure 1 shows a private network, 192.168.1.0, where AltiWare is installed and running on a host with a private IP address 192.168.1.2.

Router 1 is a NAT router. The local IP phones—IP Phone 1 and IP Phone 2—use the private IP addresses 192.168.1.100 and 192.168.1.101, respectively. There are two remote IP phones: IP Phone 3 with a private IP address 192.168.2.100 connects to the Internet via Router 2. Router 2 can also sit behind a DSL/Cable Modem.

Setup

For the Corporate LAN:

•AltiWare

AltiWare is installed (private IP address 192.168.1.2). The public IP address of Router 2 should be configured as the IP address of this IP extension in AltiWare. If it is changed dynamically, then assign a dynamic IP address configuration for that extension.

•Router 1

Router 1 is a NAT router. You need to set up the H323/SIP port forwarding for this NAT router from 169.254.56.169 to the private IP address of AltiWare 192.168.1.2.

For the Remote IP Phone Using NAT

•IP Phone 3

When configuring remote IP Phone 3, you should set up the AltiWare IP address to Router 1’s public IP address — 169.254.56.169.

•Router 2

318AltiWare ACM 5.1 Administration Manual