Exit Mediatrix anonymously when desired

The following configuration is one of the methods that allows you to make anonymous outgoing calls from a Mediatrix gateway simply by prefixing the number to be called with a convenient prefix. The Mediatrix gateway and the VOIspeed PBX are involved in the configuration.

Let’s suppose that the desired prefix for making anonymous calls to the Mediatrix (ISDN) is 77: users who want to make an anonymous call must therefore prefix the number to be called with the prefix 77; for example, to call the number 02111111111, the number 7702111111111 must be dialed. It is possible to choose any prefix as long as it does not create ambiguity with the existing prefixes in the switchboard.

PBX configuration

In the advanced configuration of the gateway associated with the Mediatrix, set the rules for the prefix: prefix, prefix, to (without spaces), where prefix is ​​the chosen prefix. In the example, the prefix is ​​77, therefore the string to be written is, 77,77, a If, on the other hand, you want to always exit out of order with this gateway, you will need to insert rules for each prefix managed by this gateway, for example for fixed and mobile phones: 0,, a and 3,, a Anonymous Call Prefix

Mediatrix Gateway Configuration

Create a new Mapping type with the following parameters: Name: Remove Prefix Criteria: Called E164 Transformation: Called E164 Press the Save and Insert button Expression
In the screen that appears, set the following parameters: Name: Remove Prefix (it is already indicated) Criteria: a (. +) Transformation: \ 1Press the Save
Create a second Mapping type with the following parameters: Name: Anonymous Criteria: Called E164 Transformation: Calling PIP Press the button Save and Insert Expression Prefix
In the screen that appears, set the following parameters: Name: Anonymous (it is already indicated) Criteria: a (. +) Transformation: restricted Sub Mapping: Remove Prefix (choose it from the drop-down menu on the side) Press the button Save Prefix
Once back on the home page, edit the outgoing training rule (s) (typically those with Source equal to sip-default and Destination equal to the hunt-ISDN group or a single BRI interface) and add the “Anonymous” mapping in the Mappings field by choosing it from the drop-down menu on the side. Click on Save and then on Apply at the bottom of the page.

NOTE: if after these settings the call still goes out in the clear, try to force the exit number in the gateway settings (without the leading zero), setting it to the true socket number, even if it will actually be hidden.