By Leif Madsen, Russell Bryant

Asterisk has a wealth of good points that will help you customise your PBX to fill very particular company wishes. This brief cookbook bargains recipes for tackling dialplan basics, making and controlling calls, and tracking channels on your PBX atmosphere. every one recipe encompasses a easy code answer you could positioned to paintings instantly, in addition to a close dialogue that provides perception into why and the way the recipe works.

This ebook specializes in Asterisk 1.8, even if the various conventions and knowledge awarded are version-agnostic. those recipes contain ideas that will help you:
* Authenticate callers sooner than relocating on on your dialplan
* Redirect calls bought via your auto-attendant
* Create an automated call-back provider
* begin hot-desking to login to and settle for calls at any workplace machine
* computer screen and interrupt dwell calls to coach new staff at a decision middle
* list calls out of your Asterisk dialplan

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After the prompts finish playing, the WaitExten() application will wait an additional five seconds for a key to be pressed. At this point, there are four different cases that may occur: The called party does nothing. In this case, the s extension will continue to the next step and the GOSUB_RESULT variable will be set to BUSY. This makes the Dial() application act like this outbound call attempt returned a busy response. The called party presses 1 to accept. The call will jump to the 1 extension which does nothing.

In order to know which department is being called, we’ve modified the callerID name by prepending either RCP for reception or SLS for sales. For both extensions we’ve dialed the same device within the company. However, depending on which extension was dialed, we’ve configured separate voicemail boxes. When setting up the voicemail greetings, you’ll need to modify the transmitted audio using PITCH_SHIFT() prior to calling VoicemailMain() so that your voice sounds the same across answered calls and the voicemail greeting.

New agents are all placed into the training group which makes it easy to scan and listen to calls while providing help where necessary. To do this, we need to associate channels with a spygroup using the SPYGROUP channel variable. By setting the channel variable for a particular channel, ChanSpy() can then be directed to listen only to channels in a particular spygroup. 7, we need to make sure the SPYGROUP channel variable is set on the channel we want to spy on and whisper to. In order to do this, we need to use the U() option of Dial(), which will execute a subroutine which sets the channel variable on the called channel verses the calling channel.

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