To round out this thread, I've summarized the responses at: http://204.210.50.240/techref/default.asp?url=io/relays.htm feedback appreciated. I inserted the authors names in accordance with signature lines, so if you want a web page link let me know James Newton mailto:jamesnewton@geocities.com phone:1-619-652-0593 http://techref.homepage.com NOW OPEN (R/O) TO NON-MEMBERS! Members can add private/public comments/pages ($0 TANSTAAFL web hosting)