Polycom ViaVideo 사용자 설명서

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Chapter 3
System Information and Diagnostics
ViaVideo User’s Guide
56
www.polycom.com
We recommend that you select line speeds that you know your 
network can handle. If you are not sure which line speeds are best, 
contact your network administrator.
ViaVideo provides ultra-low speeds, 80 and below, to provide for 
connection over very low bandwidth networks, such as dial-up 
modems. Although the low transfer rate results in blocky image 
transmission, audio quality is not affected. 
Quality of Service and Firewalls
In this screen, you can configure your quality of service, Network 
Address Translator (NAT), and firewall options. 
Use Fixed Ports
Specifies the fixed ports assigned to 
ViaVideo when working with a firewall.
System is behind a NAT Alerts ViaVideo to use the IP address 
that appears in the NAT outside (WAN) 
address
 field as its external IP address.
When using a Virtual Private Network 
(VPN) for your network connection, 
make sure that System is behind a 
NAT
 is not selected.
ViaVideoUG.book  Page 56  Thursday, December 7, 2000  2:49 PM