TANDBERG Gatekeeper User Manual download pdf (Page 26)

TANDBERG Gatekeeper User Guide

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5. Transforming Destination Aliases

5.1. Alias Transforms

The Alias Transforms function takes any aliases present in ARQ and LRQ messages and runs a set of

transformations on them. The resulting aliases will then be used in the normal Gatekeeper logic, exactly

as if those aliases were unchanged. Alias transforms will be applied prior to possible CPL modification

and Zone transforms. The Alias transforms will not have any effect on aliases presented in GRQ or RRQ

messages.

Alias transform rules are created either:

 using the xconfiguration Gatekeeper Transform commands, or

 using the web interface via Gatekeeper Configuration > Transforms and selecting Add New

Transform.

Alias transforms support the use of Regular Expressions. See Appendix C for further information.

Example

We have two gateways registered with the Gatekeeper with prefixes of 7 and 8 respectively.

We want to allow the users to dial 9 for an “outside line”, but use GW1 for local calls, and GW2 for

international calls. We should allow an alias manipulation that takes a destination alias of 90047… and

replaces it with 80047… and an alias of 90118… with 70118…. This is achieved by configuring alias

transforms as shown in Figure 7:

Figure 7: Example configuration of alias transforms

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TANDBERG Gatekeeper User Manual Page 26