Asterisk is free and open source code to create software PBX server. See [http://www.asterisk.org] / for details. This The package runs perfectly runs inside an OpenVZ [[container]]. Some users run up to 60 containers with Asterisk deployed for production per single [[hardware node]]. Although the easiest way to install Asterisk into a container is to use pre-build package from Linux distribution, occasionally one may need to have a possibility to build it from source tarball available on developer's site.

In order to do it so the following remarks are worth reading:.

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

cd asterisk-x.x.xx.tar.gz

To configure Asterisk itself see , for example [http://www.digium.com/elqNow/elqRedir.htm?ref=, http://downloads.oreilly.com/books/9780596510480.pdf].

==MeetMe problem==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.

==HN configuration==Finally you need to make sure that on [[HN ]] ztdummy kernel module is loaded and the access to <code>/dev/zap/pseudo </code> device file is granted toCTthe container: