Tony, thanks for the help. It's more than I knew before.=20
I can be persistent, in fact a friend of mine is looking up=20
"communications analiser" as we speak. He too uses an
A communications analyser (sometimes called a comms analyser and closely
related to a protocol analyser) is a piece of test equipment that
connects between 2 devices and displays the data (and other things, like
the states of control lines) between them. It's a rather specialised
unit, not the sort of thing you'll have lying around and no know it.
Be warned that some people on classiccmp have very unusual test gear :-)
-tony