I am running Cisco CIAC-GW-K9 software version 1.3.1(0.3.8), when I connect the Nedap Upass reader close to the gateway the Nedap reader works. When I connect the Nedap reader about 35 metres away, I get a Reader Decode Failed.
Assuming your cabling is the right gage, make sure the ground wire is connected. That has been the usual culprit for me.
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