TANDBERG D14049.04 - Manual (Page 275)

275
D14049.04
JULY 2008
Grey Headline (continued)
TANDBERG VIDEO COMMUNICATIONS SERVER
ADMINISTRATOR GUIDE
Introduction Getting Started
Overview and
Status
System
Configuration
VCS
Configuration
Zones and
Neighbors
Call
Processing
Bandwidth
Control
Firewall
Traversal
Appendices Applications Maintenance
Glossary
Term Definition
UA
User Agent A SIP device used to make and receive calls.
UDP
User Datagram Protocol A communication protocol defined by RFC 791 [18] . It is less reliable than TCP.
URI
Uniform Resource Identifier A formatted string used to identify a resource, typically on the internet.
User Policy The set of rules that determine the action(s) to be applied to calls for a particular user or group.
VCS
Video Communications Server A generic term for the TANDBERG product which acts as a gatekeeper and SIP Proxy/Server.
VCS Control A VCS whose main function is to act as a gatekeeper, SIP proxy and firewall traversal client. This system will generally be located within the firewall.
VCS Expressway A VCS with the same functionality as a VCS Control that can also act as a firewall traversal server. This will generally be located outside the firewall.
Zone Zones are used on the VCS to define and configure connections to locally registered and external systems and endpoints. The Local Zone refers to all the locally
registered endpoints and systems, and consists of configurable subzones. External zones are used to configure connections to external systems with which the VCS
has a Neighbor, Traversal Client or Traversal Server relationship, and to configure the way in which the VCS performs ENUM and DNS searches.