asterisk software package provides Open Source Private Branch Exchange (PBX), you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install asterisk
asterisk is installed in your system.
Make ensure the asterisk package were installed using the commands given below,
$ sudo dpkg-query -l | grep asterisk *
You will get with asterisk package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Communication Programs |
| Package | asterisk |
| Version | 1:1.8.10.1~dfsg-1ubuntu1 |
| Description | Open Source Private Branch Exchange (PBX) |
| Sub Section | comm |