Altigen AltiWare ACM 5.1 Administration Manual page 332

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
•
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AltiWare ACM 5.1 Administration Manual