AltiGen MAXCS 7.0 Update 1 ACM Administration - Manual (Page 320)

Chapter 25: Network Configuration Guidelines for VoIP
304 MaxCS 7.5 Administration Manual
Private Network Configuration Example
(MAXCS with private IP address and behind NAT)
Only the private IP address is used in a private network. The public router will not route the packet that has a
private IP address as its destination. (All IP addresses beginning with 192.168.x.x, 10.x.x.x, or 172.16.x.x to
172.32.x.x are private IP addresses.)
Figure 172. MAXCS behind NAT
This figure shows a private network, 192.168.1.0, where MAXCS 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 Mo-
dem.
Example Setup: Corporate LAN
• MAXCS – MAXCS 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 MAXCS. 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 SIP port forwarding for this NAT router from
169.254.56.169 to the private IP address of MAXCS 192.168.1.2.
Example Setup: Remote IP Phone Using NAT
• IP Phone 3 – When configuring remote IP Phone 3, you should set up the MAXCS IP address to Router
1’s public IP address — 169.254.56.169.