...
Ok. The 3270-series are coax SNA EBCDIC terminals
mostly
used with mainframes. The 5250-series are twinax EBCDIC
terminals mostly used with midrange systems. The 3150-series
are RS-232 ASCII terminals mostly used with RS/6000's.
All true, but the subject was not a 315x, it was a IBM 3197/D.
It is a twin-ax terminal used with a midrange system - Sys/34, 36, 38,
AS/400. It supports a local ASCII printer through a parallel port. See the
following two web sites:
http://www.argecy.com/3197.html
http://www.moorgate.co.uk/products/workstations/Second%20User.htm
Gil
Peace... Sridhar