Hi Alex I’m familiar with SNA DFT and in a previous life released several products that utilized it. I’ll look back at some old docs I have to see if there is anything worth while sending you. As I said we did 2 products. One was called the “Port-Xpander” and basically looked like a DFT Terminal on one side (coax attached to a 31 or 3274) and had five coax outputs that connected to 3270 cut terminals. It was used to expand the port capacity of a 3174 from 32 ports up to 160 ports. The second product was called “SyncLink” and it coax attached to a 3174 mux port and looked like 8 DFT devices on the input side. The output side was multiple SDLC lines that connected to down stream PU2 devices. It was in effect a poor mans 3745. Did not require NCP but to remote PU2 devices it looked like a 3745.
Let me see what I can dig up from the old dusty storage area Ken Kenneth A. Bloom CEO Avenir Technologies Inc /d/b/a Visara International 203-984-2235 [email protected] www.visara.com > On May 11, 2020, at 2:17 PM, Alexander Huemer <[email protected]> wrote: > > Hi > > I have a 3290 terminal that I'd like to put to some use. See email > thread 'Talking to 3270 terminals?' that I started Jan 14. > Somebody then pointed me to oec[1], which is an awesome project. I have > built the hardware interface that is required to talk to a 3270 terminal > on the hardware level. A picture of the interface and a video of the > terminal can be found at [2]. > > Now, the friendly person who created oec says that the 3290 is a so > called DFT (Distributed Function Terminal), in contrast to a CUT > (Control Unit Terminal). Most 3270 terminals seem to be of the (simpler) > CUT variant. oec only works with CUT terminals. Extending the > functionality to enable it to work with DFT terminals isn't trivial. > > Does anybody on the list here know of additional documentation besides > what's mentioned at [3] that could be helpful to implement DFT support? > > What would also be very helpful is a protocol trace of any kind of the > communication between a 3174 and a DFT terminal. > > -Alex > > [1] https://github.com/lowobservable/oec > [2] https://ahuemer.xx.vu/volatile/2020-05-11-P6C1Wc3u1wU/ > [3] https://github.com/lowobservable/coax/blob/protocol/protocol/protocol.md > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
