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Administrator’s Guide for Polycom HDX Systems
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3. Select and configure these settings on the Bandwidth screen:
Configuring the System for Use with a Firewall or NAT
A firewall protects an organization’s IP network by controlling data traffic
from outside the network. Unless the firewall is designed to work with H.323
video conferencing equipment, you must configure the system and the
firewall to allow video conferencing traffic to pass in and out of the network.
Fireall Settings
Network Address Translation (NAT) network environments use private
internal IP addresses for devices within the network, while using one external
IP address to allow devices on the LAN to communicate with other devices
outside the LAN. If your system is connected to a LAN that uses a NAT, you
will need to enter the NAT Public (WAN) Address so that your system can
communicate outside the LAN.
Setting Description
Dynamic
Bandwidth
Specifies whether to let the system automatically find the
optimum line speed for a call.
Maximum
Transmit
Bandwidth
Specifies the maximum transmit line speed between 64 kbps and
4096 kbps.
Maximum
Receive
Bandwidth
Specifies the maximum receive line speed between 64 kbps and
4096 kbps.
Note: The 6 Mbps option is only for multipoint calls. It is not
available as a maximum bandwidth.