One solution might be a RS232 A/B if you need the K3 utility switch it
to A when you want the NaP3 or what ever else switch it to B.
http://www.amazon.com/DB9-Female-Way-Switch-Box/dp/B002J0OTTC/ref=sr_1_2?ie=UTF8&qid=1344373302&sr=8-2&keywords=serial+switch+boxRegards
Art
ka9zap
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