20 Jan
2014
20 Jan
'14
3:50 p.m.
On Mon, Jan 20, 2014 at 5:35 PM, Richard <legalize at xmission.com> wrote:
My airline terminal has something that looks like an
RS-232 port, but
it's not RS-232. It appears to be some sort of synchronous variant of
SNA in terms of signals:
<http://user.xmission.com/~legalize/vintage/images/westinghouse/W1643-2.jpg>
I have an "Informer" terminal that sounds like that - the terminals
are identical, but the one that talks to the modem acts like an SNA PU
Type 2 (like a 3274), and all of the terminals attached to the
downstream connector act as terminals to it. They were available for
cheap ($50?) at Dayton about 20 years ago. We got them to help
characterize some additional valid BIND sequences in our efforts to
support our SNA COMBOARD customers. That was most of our debugging
time - getting the BIND right. Once all the right fields and options
were correct, things worked great. We usually got calls when the
customer would upgrade their IBM over the weekend and reset all the
comm params to defaults.
-ethan