Altiware Nat Support Feature - Altigen AltiWare OE/ACC Version 5.0A Administration Manual

Board Configuration
If this H.323 endpoint is IP Talk integrated with AltiView, you need to set
all unknown TCP/UDP ports to be forwarded to the IP phone's private IP
address. This is usually referred to as DMZ port forwarding in most NAT
routers.

AltiWare NAT Support Feature

AltiWare's NAT support feature makes it possible to make H.323 IP calls
through a NAT with or without H.323 support. When you use AltiWare
with NAT, first you need to find out if the NAT router supports H.323.
After you set up the H.323 traffic forwarding (according to "Setting up
H.323 Traffic Forwarding for NAT" on page 6-28) to make calls from both
inside and outside NAT. If both incoming and outgoing connections work
fine, that means that NAT supports H.323. If one of them fails, disable the
"Fast Start Enable" option in the AltiWare VoIP board configuration dialog
box. Then repeat the testing to verify the call can be completed for both
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
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