3.1. What Packages Do I Need?
Asterisk uses 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. The zaptel drivers are required if you are using
analog or digital hardware, or if you're using the ztdummy driver (discussed later in this
chapter) as a timing interface. The libpri library is technically 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.
One other package you may want to install is
asterisk-sounds. While Asterisk
comes with many sound prompts in the main source distribution, the
asterisk-sounds package will give
you even more. If you would like to expand the number of
professionally recorded prompts for use with your Asterisk system,
this package is essential. Some of our examples in the following
chapters will make use of files included in this package, so we
will assume that you have it installed.
3.1.1. Package Requirements
To compile Asterisk, you must install the
GCC compiler (Version 3.x or later) and its dependencies.
While Version 2.96 of GCC may work for the time being, future
versions will not support it. Asterisk also requires bison, a parser generator program that
replaces yacc, and ncurses for CLI functionality. The
cryptographic library in Asterisk requires OpenSSL and its
development packages. If you want to use ztdummy for timing, or any of the hardware
drivers provided by Zaptel, you'll need to install the zaptel package as well. If you are installing
libpri, be sure to install it
before asterisk (see "Compiling
libpri").
Zaptel requires libnewt and its development packages for the
zttool program (see "Using ztcfg
and zttool," below) and the usb-uhci module for ztdummy. If you're using PRI interfaces,
Zaptel also requires the libpri
package (again, even if you aren't using PRI circuits, we recommend
that you install libpri along with
zaptel).
The following sections discuss how to obtain,
extract, compile, and install the asterisk, zaptel, libpri, and asterisk-sounds packages. |
