Install kppp by entering the following commands in the terminal:
sudo apt update sudo apt install kppp
Description:
modem dialer for KDE
KPPP is a modem dialer for connecting to a dial-up Internet Service Provider. It displays statistics and accounting information to help users keep track of connection costs. . This package is part of the KDE 4 networking module.
Homepage: http://www.kde.org/
Version: 4:17.08.3-0ubuntu1
Section: universe/net