How to install Asterisk under Ubuntu

1. Install Ubuntu 7.04


2. download libpri,zaptel,asterisk from http://www.asterisk.org/downloads
libpri 1.4.3
zaptel 1.4.9.2
asterisk 1.4.18.1

3. pre-install package
bison
libncurses-dev
zliblg-dev
libcurl4-openssl-dev
libgnutls-dev
libstdc++-4.1-dev
g++
apt-get install build-essiental

4. compile libpri
enter the directory
make
make install

5. compile zaptel
enter the directory
make
make install

6. compile asterisk
enter the directory
./configure
make
make install
make samples

7. run asterisk
sudo asterisk -vvvvc