Altigen Ip Phone Nat Support Feature - Altigen AltiWare OE/ACC Version 5.0 Administration Manual

Configuring the Triton VoIP Board
incoming and outgoing. If disabling the "Fast Start Enable" option makes
the IP calls work fine, this means this NAT partially supports H.323. If you
still get the problem with IP call cross NAT, as a final solution, enable the
AltiWare NAT support feature according to the following instructions.
Figure 12. Triton VoIP Trunk Configuration window
Double-click the VoIP board in the Board View of AltiAdmin to open the
Board Configuration dialog box. Click the Board Configuration button
to open the following Triton VoIP Trunk Configuration dialog box.
Enable the H.323 Cross NAT Support Enable check box and then enter
the NAT router's public IP address in the NAT Mapped Public Address
field. If you have the local IP phone, which is in the same private network
with AltiWare, enable the Use Private Address in Private Network check
box; then enter the Subnet Address and Subnet Mask of the private
network.

AltiGen IP Phone NAT Support Feature

When the AltiGen IP phone (firmware version 1116 or above) is running in
normal mode and registered to the server (AltiWare version 4.6 SP1 or
above), the phone has the intelligence to support H.323 cross NAT. But the
NAT that is in front of the AltiGen IP phone must be set up according to
"Setting up H.323 Traffic Forwarding for NAT" on page 6-28.
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