I'm work on a college campus, and we are having issues keeping our wic-2T cards functional. We operate a cisco academy here, and we are constantly plugging and unplugging serial cables. I would imagine that both the cables and the cards are not built to tolerate being plugged and unplugged a thousand times a year. Generally, what happens is one of the ports on the card just refuses to work. Does anyone have any ideas for me on how to prolong the life of these serial cards?