Install kannel-docs by entering the following commands in the terminal:
sudo apt update sudo apt install kannel-docs
Description:
WAP and SMS gateway documentation
Kannel is a gateway for connecting WAP (Wireless Application Protocol) phones to the Internet. It also works as an SMS/SMPP gateway, for providing SMS based services for GSM phones. . Documentation in html, rtf and pdf format.
Homepage: http://www.kannel.org/
Version: 1.4.4-5
Section: universe/net