Polycom 4300T Manual De Usuario

User Guide V

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IU 4300T Converged Network Appliance

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call quality possible for voice and video traffic.  At the same time they 

ensure the best utilization of WAN bandwidth by enabling data traffic to 

burst up to full line rate in the absence of video calls.  Precedence is 

automatically given to traffic coming from video endpoints and other 

devices using the 4300T’s Application Layer Gateway function.  

• Video NAT/PAT translation for video endpoints and PC’s.  This allows a 

single IP address to be used on the WAN link to represent all of the private 

IP addresses assigned to the LAN video endpoints and PC’s.

• A video aware firewall.  A full layer 7 gateway for video traffic and a 

stateful packet inspection firewall for data traffic

• Call Admission Control (CAC). CAC uses a deterministic algorithm to 

decide when there are insufficient network resources available to 

adequately support new video calls and then return the equivalent of a 

“fast busy” to new call requests. 

System Configuration

configure LAN/WAN interface

Yes

set ethernet link rate

Optional

enable the DHCP server

Optional 

configure SNMP

Optional

VoIP Configuration

enable the VoIP ALG

Yes

configure a VoIP subnet route

Optional

Data Networking Configuration

dynamic NAT

Optional but recommended

static NAT

Optional

static IP routing

Optional

Firewall Configuration

enable the data firewall

Yes

configure basic settings

Optional

configure advanced settings

Optional

Traffic Management 
Configuration

enable traffic shaping

Yes

enable Call Admission Control 

Optional