3 Administrator Settings
3.4.2.3 Advanced H.323 Settings
The Advanced H.323 Settings only have an effect if they are supported by your IP infrastructure.
NAT
NAT, Network Address Translation, is used in small LAN’s, often home offices, when a PC and a
videoconferencing system are connected to a router with NAT support. NAT support in the
videoconferencing system enables proper exchange of audio/video data when connected to an
external videoconferencing system (when the IP traffic goes through an NAT router). When NAT
is On, the NAT Server Address will be shown in the startup-menu: "My IP Address: 10.0.2.1
(NAT)".
On
The system will signal the configured "NAT Address" in place of its own IP-address
within Q.931 and H.245.
Auto
The system will try to determine if the "NAT Address" or the real IP-address should
be used within signalling. This is done to make it possible to place calls to
endpoints on the LAN as well as endpoints on the WAN.
NAT Address
This must be the external/global IP-address to the router with NAT support. Packets sent to the
router will then be routed to the codec. In the router, the following ports must be routed to the
codec’s IP-address:
Port 1720
Port 5555-
5560
Port 2326-
2365
Please contact your TANDBERG representative for further information.
H.323 Ports
Static
When selecting static H.323 ports for TCP connections the ports 5555 or 5556
will be used for Q.931 and H.245 respectively.
Dynamic
The system will allocate which ports to use when opening a TCP connection.
The reason for doing this is to avoid using the same ports for subsequent calls
as some firewall consider this as a sign of attack.
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