TANDBERG D14049.01 manual CallText Processinggoeshere, Locating a Destination Endpoint

CallText Processinggoeshere

TANDBERG VIDEO COMMUNICATION SERVER ADMINISTRATOR GUIDE

Locating a Destination Endpoint

Overview

One of the functions of the VCS is to route calls to their appropriate destination, based on the address or alias received by a locally registered endpoint or neighbor zone.

There are a number of steps involved in determining the destination of a call, and some of these steps can involve transforming the alias or redirecting the call to other aliases. It is important to understand the process before setting up your dial plan so you can avoid circular references.

Process

The process followed by the VCS when attempting to locate a destination endpoint is shown in the diagram opposite.

. The user enters into their endpoint the an alias or address of the destination endpoint. This can be in a number of different formats.

. The destination address is sent from the caller’s endpoint to its local VCS (i.e. the VCS to which it is registered).

3.The VCS applies any Local Zone transforms to the alias.

4.The VCS applies any Administrator Policy to the (transformed) alias. If this results in a new alias, the process starts again, with the new alias checked against the Local Zone transforms.

5.The VCS applies any User Policy to the alias. If the alias is a FindMe name, the process will start again; all the resulting aliases will be checked against Local Zone transforms and Administrator Policy.

6.The VCS then checks all its local registrations and those of its Alternates for the alias, placing the call if the alias is found.

7.If the alias is not found locally, the VCS will then query its zones, in priority order, to see if any of them can find the alias. If the alias matches an ENUM zone, this may return a URI. If so, the process starts again; the URI is checked against any Local Zone transforms, Administrator Policy and User Policy.

8.If the alias is found by one of the neighbor zones, the call will be placed to that zone.

Introduction	Getting	System	System	H.323 & SIP	Registration	Zones and	Call	Firewall	Bandwidth	Maintenance	Appendices
	Started	Overview	Configuration	Configuration	Control	Neighbors	Processing	Traversal	Control
D 14049.01					60
07.2007