How To
Connecting to Dark Systems BBS is easy!.
You can either use terminal client software, or use the excelent web based fTelnet client.

If you just want to connect, no fuss, no muss, then use the web based fTelnet client.
On the home page, scroll down to the bottom of the Dark Systems BBS welcome screen and click CONNECT.
DONE! :)

If you want the more traditional, nostalgic terminal client experience, I'd recommend the following terminal software:
SyncTerm is freely available for Windows, Linux, OSX & BSD. here
NetRunner is freely available for Windows & Linux. here

Use the settings below in your terminal software to connect to Dark Systems BBS
Telnet address:
Telnet port: 23