dahdi-linux software package provides DAHDI telephony interface - Linux userspace parts, 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 dahdi-linux
dahdi-linux is installed in your system.
Make ensure the dahdi-linux package were installed using the commands given below,
$ sudo dpkg-query -l | grep dahdi-linux *
You will get with dahdi-linux package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Communication Programs |
| Package | dahdi-linux |
| Version | 1:2.5.0.1+dfsg-1ubuntu2 |
| Description | DAHDI telephony interface - Linux userspace parts |
| Sub Section | comm |