There is a pdf on this product downloadable from;
http://www.willdata.com/v2/downloads/Network_Guide_0605/index.htm
It is a 3745 emulator that runs under Linux/390 in an LPAR or VM and
it is marketed by IBM to replace the 3745 which was withdrawn from
marketing some years ago.
Could one run this under Linux under Hercules or would the OSA Licensed
Code be a problem? Technically or politically? It seems to me that one
could turn an old PC into a passable 3745 fairly easily and cheaply.