User guide

Chapter 24: Network Configuration Guidelines for VoIP
294 MAXCS ACC 6.7.1 Administration Manual
VPN Network Configuration Example
(Connecting to MAXCS with VPN)
Figure 138. MAXCS with VPN
In a multi-site configuration, VPN can be used to provide a secured tunnel between the
remote sites and the corporate site.
Figure 138 shows a network layout in which there are two private networks, the corpo-
rate LAN and branch office LAN. The VPN tunnel connects the two private networks such
that the two networks access each other with a private IP address.
In the corporate network, MAXCS is installed on a host with private IP address
192.168.1.2.
Both Router 1 and Router 2 are VPN-capable and compatible with each other. (It is
recommended that the routers come from same vendor.) A VPN tunnel exists between
these two routers. The local IP phones—IP Phone 1 and IP Phone 2—directly connect to
the corporate network with private IP address 192.168.1.100 and 192.168.1.101. And
the three remote IP phones—IP Phone 3, IP Phone 4 and IP Phone 5—connect to the
branch office network with private IP addresses 192.168.2.100, 192.168.2.101 and
192.168.2.102, respectively.
Setup
For the Branch office LAN
• IP Phone 3, IP Phone 4 and IP Phone 5
When configuring the remote IP phones—IP Phone 3, IP Phone 4, and IP Phone 5—
you should set up the AW address to use AltiServ’s IP address.
For the VPN Tunnel between the Two Private Networks:
You must set up a VPN tunnel to connect the two private networks. The VPN setup pro-
cedure may be complicated and is generally performed by a professional IT technician.