Yes and Yes. Had 1 JCI TEC on a Delta Net2 all by it's lonesome and it would x out in ORCAview every couple of minutes for a couple of seconds. Also had issues with adjusting values in the TEC from ORCAview. Was going to mess around with priority arrays but haven't messed with my Delta for a couple of months.
"Open is as open does." - Forrest Gump "Can't we all just get a Lon?" - Garry Jack "BACnet: integration or interrogation?" - The Janitor "Open protocols? You can't handle open protocols!" - Nathan R. Jessup “What’s that? Aaa… open protocols? Don’t talk about…. open protocols? Are you kidding me? Open protocols? I just hope we can hardwire an interface!” - Jim Mora http://www.youtube.com/watch?v=U7fjDS0jKiE
Is this related to the same job you where inquring a while back ?
18-2 should not be a problem. As long as all MS-TP wiring reccomendations are respected: shield, EOL's, proper daisy chain, etc....
This being said, I think I may have a clue to what your issue could. I recently saw some packet captures with Delta hardware at 76.8 KBps with issues related to Token passes & token being dropped once in a while. If the case, the fixe is simple.
Do you have any packet captures available ? If so I can point you in the right direction.