Polycom VSX Series Manual De Usuario

Administrator’s Guide for the VSX Series

3 - 16

Select 

 and configure these settings:

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. 
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.

Go to System > Admin Settings > Network > IP > Firewall.

Configure these settings:

Specifies whether to let the system automatically find the 
optimum line speed for a call. 

Specifies the maximum transmit line speed between 64Kbps and 
1920 Kbps.

Specifies the maximum receive line speed between 64Kbps and 
1920 Kbps.

Lets you specify whether to define the TCP and UDP ports.
•

If the firewall is not H.323 compatible, enable this 
setting. The VSX system assigns a range of ports 
starting with the TCP and UDP ports you specify. The 
system defaults to a range beginning with port 3230 for 
both TCP and UDP. 
Note: You must open the corresponding ports in the 
firewall. You must also open the firewall’s TCP port 
1720 to allow H.323 traffic.

If the firewall is H.323 compatible or the system is not 
behind a firewall, disable this setting.