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D 13954.01
MAY 2006
115
TANDBERG 1700 MXP
USER GUIDE
H.323 Settings (IV) – Advanced NAT Settings
Control Panel > Network Settings > LAN Settings
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The upper part of the menu is explained on
the preceding pages.
CANCEL
Select this icon and press OK
to leave the menu undoing any
changes.
RESTORE DEFAULTS
Select this icon and press OK
to restore the default settings.
SAVE
Select this icon and press
OK to leave the menu putting
changes into effect.
NOTE! The Advanced H.323 Settings only have
effect when supported by your IP infrastructure.
NAT ADDRESS
This must be the external/glo-
bal IP-address to the router with
NAT support. Packets sent to
the router will then be routed to
the system. In the router, the
following ports must be routed
to the system’s IP-address:
Port 1720
Port 5555-5560
Port 2326-2365
Please contact your TANDBERG
representative for further infor-
mation.
RSVP
Auto. Resource Reservation
Protocol enables the systems to
request the optimum amount of
bandwidth for the duration of an
IP videoconference.
Off. Resource Reservation
Protocol is switched off.
H.323 PORTS
Static. When selecting static
H.323 ports for TCP connec-
tions the ports 5555 to 5574
will be used for Q.931 and
H.245 respectively.
Dynamic. The system will al-
locate 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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•
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About Network Address Translation (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 a 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.
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