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In order to install Asterisk, we will need a computer with Linux installed. It's a good idea to ensure your system is up-to-date, for instance, by using the yum tool. Once we have installed our distribution of choice, we need to make sure we have a few additional packages installed. The required extra packages over a base installation are:
Bison, and associated -devel (1.0.X only) gcc
Kernel-source
Libtermcap-devel
ncurses, and associated -developenssl, and associated -develzlib, and associated -devel