Install gastman by entering the following commands in the terminal:
sudo apt update sudo apt install gastman
Description:
GUI tool for Asterisk administration and monitoring
Gastman is a graphical Manager interface for Asterisk. It uses the GTK+ library, and so is usually run under XWindow, although GTK+ environments also exist for Windows and Mac OS X.
Homepage: http://downloads.digium.com/pub/gastman/
Version: 0.99+1.0rc1-0ubuntu9
Section: universe/comm