The etmnet project aimed to have internet terminals in public places.
It supported all the different kind of connectivity available at the time (PSTN, ISDN, LAN). End users would be able to use internet by buying prepaid cards.
In every public place there could have been a single terminal or multiple ones connected through a LAN. In the latter case one of those terminals would act as server, managing the connection.
The etmnet infrastructure was based on Debian GNU/Linux. Software was written in C and TCL/Tk.