== Building Asterisk in a [[CT]] ==

Asterisk PBX server itself is compiled out of the shelf in a [[container]] provided that development tools are installed. The functionality of the resulting executable is enough to support simple VoIP telephony.

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wget http://downloads.digium.com/pub/asterisk/releases/asterisk-x.x.xx.tar.gz

To configure Asterisk itself see, for example, http://downloads.oreilly.com/books/9780596510480.pdf.

Unfortunately, one particular module called MeetMe (conferencing tool) will be switched off from compilation. This happens due to external dependency on 'zaptel' package. Zaptel provides support for some hardware cards for FXO/FXS analog telephony marketed by Digium (the company behind Asterisk), and on top of that supplies so called <code>ztdummy</code> kernel module. Ztdummy works like a simple metronome which is required to synchronize multiple sound streams in case of conference call.