TANDBERG 770 MXP User Manual page 177

Administrator Settings
Note that if your system is part of a TANDBERG Expressway™ firewall traversal solution and
is placed outside the firewall, you should register the IP address of your Border Controller as
the Gatekeeper IP address and set H.323 Call Setup to Gatekeeper.
4.8.2.2.6 CallManager IP
This is the CallManager IP-address that is used if you specify H.323 Call Setup: Call Manager.
4.8.2.2.7 H.323 Prefix
When dialing a number prefixed with digits specified by H.323 Prefix, and with Net: Auto, an
H.323 call will be placed.
Example:
H.323 Prefix is "555". Dialing "55582" with "Net:Auto" will select LAN.
4.8.2.2.8 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 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 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.
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