TANDBERG D14049.04 manual 194, CPL Reference, Overview of CPL on the VCS, Address-switch

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CPL Reference

TANDBERG VIDEO COMMUNICATIONS SERVER ADMINISTRATOR GUIDE

Overview of CPL on the VCS

This Appendix gives details of the VCS’s implementation of the CPL language and should be read in conjunction with the CPL standard RFC 3880 [5] and the TANDBERG guide to writing CPL [22].

The VCS supports most of the CPL standard along with some TANDBERG-defined extensions. It does not support the top level actions <incoming> and <outgoing> as described in RFC 3880. Instead it supports a single section of CPL within a <routed> section.

When Administrator Policy is implemented by uploading a CPL script to the VCS, the script is checked against an XML schema to verify the syntax. There are two schemas - one for the basic CPL specification and one for the TANDBERG extensions. Both these schemas can be downloaded from the web interface and used to validate your script before uploading to the VCS.

The following example shows the correct use of namespaces to make the syntax acceptable:

<?xml version="1.0" encoding="UTF-8" ?> <cpl xmlns="urn:ietf:params:xml:ns:cpl"

xmlns:taa="http://www.tandberg.net/cpl-extensions" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:ietf:params:xml:ns:cpl cpl.xsd">

<taa:routed>

<address-switch field="destination"> <address is="reception@example.com">

<proxy/>

</address> </address-switch>

</taa:routed>

</cpl>

address-switch

Overview

The address-switchnode allows the script to run different actions based on the source or destination aliases of the call. It specifies which fields to match, and then a list of address nodes contains the possible matches and their associated actions.

The address-switchhas two node parameters: Field and Subfield.

address

The address construct is used within an address-switchto specify addresses to match. It supports the use of Regular Expressions (see the Regular Expression Reference for further information).

Valid values are:

is=string	Selected field and subfield exactly match the given string.
contains=string	Selected field and subfield contain the given string.
	Note: The CPL standard only allows for this matching on the
	display subfield; however the VCS allows it on any type of
	field.
subdomain-of=string	If the selected field is numeric (e.g. the tel subfield) then
	this matches as a prefix; so
	address subdomain-of="555" matches 5556734 etc.
	If the field is not numeric then normal domain name
	matching is applied; so
	address subdomain-of="company.com" matches
	nodeA.company.com etc.
regex="regular expression"	Selected field and subfield match the given regular
	expression.

All address comparisons ignore upper/lower case differences so address is="Fred" will also match fred, freD etc.

Introduction	Getting Started	Overview and	System	VCS	Zones and	Call	Bandwidth	Firewall	Applications	Maintenance	Appendices
		Status	Configuration	Configuration	Neighbors	Processing	Control	Traversal
D14049.04					194
JULY 2008