Configuring The System For Use With A Firewall Or Nat; Fireall Settings - Polycom HDX Series Administrator's Manual

Administrator's Guide for Polycom HDX Systems

Configuring the System for Use with a Firewall or NAT

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3. Select and configure these settings on the Bandwidth screen:
Setting Description
Dynamic Specifies whether to let the system automatically find the
Bandwidth optimum line speed for a call.
Maximum Specifies the maximum transmit line speed between 64 kbps and
Transmit 4096 kbps.
Bandwidth
Maximum Specifies the maximum receive line speed between 64 kbps and
Receive 4096 kbps.
Bandwidth
Note: The 6 Mbps option is only for multipoint calls. It is not
available as a maximum bandwidth.
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.