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Most Asterisk configurations are composed of three main packages : the main Asterisk program (asterisk), the Zapata telephony drivers (zaptel), and the PRI libraries (libpri). If you plan on a pure VoIP network, the only real requirement is the asterisk package, but we recommend installing all three packages; you can choose what modules to activate later. The zaptel drivers are required if you are using analog or digital hardware, or if you're using the ztdummy driver The libpri library is optional unless you're using ISDN PRI interfaces, and you may save a small amount of RAM if you don't load it, but we recommend that it be installed in conjunction with the zaptel package for completeness.
Posted by sagitraz
The main Asterisk program (asterisk), the Zapata telephony drivers (zaptel), and the PRI libraries (libpri).
Posted by priyadarshan