User`s manual

12
VPN (Virtual Private Network)
The IP telephony gateway series supports PPTP client for VPN function. It
can establish VPN tunnel with PPTP server, and get access to the peer
private network as if it is located in the same LAN.
For special condition that SIP proxy server is located in the private network of
CO site, the gateway can register, and request a phone call via the VPN
tunnel.
Please refer to the section 2.4 VPN Settings.