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TANDBERG VIDEO COMMUNICATIONS SERVER ADMINISTRATOR GUIDE

About the Traversal Subzone	136
Traversal Calls	136
Bandwidth Consumption of Traversal Calls	136
Creating a Subzone	137
Configuring a Subzone	138
Applying Bandwidth Limitations to Subzones	139
Types of Limitations	139
How Different Bandwidth Limitations are Managed...	139
Links	140
About Links	140
Creating a New Link	140
Default Links	140
Creating Links	140
Editing Links	141
Default Links	142
About Default Links	142
Pre-Configured Links	142
Automatically Created Links	142
Pipes	143
About Pipes	143
Creating Pipes	143
Editing Pipes	144
Editing an Existing Pipe	144
Applying Pipes to Links	145
One Pipe, One Link	145
One Pipe, Two or More Links	145
Example	145
Two Pipes, One Link	145
Example	145
Default Bandwidth and Downspeeding	146
About the Default Call Bandwidth	146
About Downspeeding	146
Configuring Default Call Bandwidth and Downspeeding....	146

Bandwidth Control Examples	147
Example Without a Firewall	147
Example With a Firewall	148
VCS Expressway Subzone Configuration	148
VCS Control Subzone Configuration	148
Firewall Traversal
Firewall Traversal Overview	150
About Expressway™	150
How does it work?	150
VCS as a Firewall Traversal Client	150
VCS as a Firewall Traversal Server	150
Quick Guide to VCS Traversal Client - Server Configuration....	151
Overview	151
VCS Control (Client)	151
VCS Expressway (Server)	151
Firewall Traversal Protocols and Ports	152
Overview	152
Expressway Process	152
H.323 Firewall Traversal Protocols	152
SIP Firewall Traversal Protocols	152
Ports for Initial Connections from Traversal Clients	153
Assent Ports	153
Call signaling	153
Media	153
SIP Ports	153
Call signaling	153
Media	153
H.460.18/19 Ports	153
Call signaling	153
Media	153
STUN Ports	153
Ports for Connections out to the Public Internet	153

Firewall Traversal and Authentication	154
Overview	154
Authentication and NTP	154
Other Issues	155
Firewall Traversal and Dual Network Interfaces	155
Firewall Configuration	155
Configuring the VCS as a Traversal Client	156
Overview	156
Adding a New Traversal Client Zone	156
Configuring a Traversal Client Zone	157
Configuring the VCS as a Traversal Server	158
Overview	158
Adding a New Traversal Server Zone	158
Configuring a Traversal Server Zone	159
Configuring Traversal for Endpoints	160
Overview	160
Configuring Traversal Server Ports	161
Overview	161
STUN Services	162
About STUN	162
About ICE	162
STUN Binding Discovery	162
How it works	162
STUN Relay	162
How it works	162
Configuring STUN Services	163

Introduction

Getting Started

Overview and

System

Zones and

Call

Bandwidth

Firewall

Applications

Maintenance

Appendices

Status

Configuration

Neighbors

Processing

Control

Traversal

D14049.04

JULY 2008

TANDBERG D14049.04 manual 151