I was wondering through a trift store the other day and found a odd keyboard. It's labeled "CompuNET 2000" and looks like a regular 101 key keyboard for a PC but it has two extra cables with miniture phono plugs on the ends. One with two contacts and the other with three. It also has two phone jacks on the back of the keyboard. There are a couple of extra keys on the board. One is marked PHONE and the other is marked LINE. Some of the numeric key pad keys are marked REDIAL, MUTE, VOL, OPER, etc. anyone know what this is for?