atinout : AT commands as input are sent to modem and responses given as output ( https://atinout.sourceforge.net/index.html )
minimodem : General-purpose software audio FSK modem ( http://www.whence.com/minimodem/ )
tcpser : Hayes Smartmodem emulator over TCP/IP ( https://github.com/go4retro/tcpser )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a guru
For Paludis use this rsync : rsync://gentoo.zugaina.org/guru-portage
If you have a problem : ycarus(-at-)zugaina.org