Anyone gots any books/manuals to these? Since Nick has every Teletype document under the sun I figured I'd try here and see if something pops up. This is a CRT terminal that sort of has an identity crisis - Its Teletype labeled on the back as a Teletype 56D, but has At&t 513 badging on the front and supposedly from searches comes up as an At&t 513, 513BCT, 4425, or others. This is probably one of Teletypes last products per se.
These were used a lot on PBXes like At&t Definitys from what I understand. They're not too common per se but I've seen a few, and now own one myself. Seems I managed to bring it back from the dead (was told it was a "barn find") but no books/manuals on it.
If anyone did have the book I'd be glad to scan it and/or upload to Nick and the Internet Archive.
Jeff KC3GJX