seeking docs for Qantel systems hardware

Hi, I've got a Qantel model 10 system sitting around the house. My wife used to (I guess she still does occasionally) program on it. Qantel was a hardware manufacturer out of Hayward Ca. They went out of business (sort of) around 1987/88. I say 'sort of' because I think Mohawk Data Systems bought the support rights. I also think that someone may have attempted recently to relaunch parts of their product line. Anyway this system isdefinitely 10 years old. I'd like to see what hardware documentation might be floating around out there for this. In particular I have a real nice High-speed line printer that I would like to get service and interface info on. It was manufacture by Teletype but I haven't been able to find a model number on it and I didn't want to disassemble it right now. It is currently still working fine, but I'd like to connect it to some other equipment. From the little I've examine it, it appears that it might be a current loop interface (the era is right for this also). Anyone familiar with this printer? Thanks, Jon