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No communication with RS-232 or RS-485 controllers, Integrated Security Solutions, Access Control System, Car Parking, Biometric, Fingerprint, Proximity Reader, Desfire Smart Card, Integration, Turnstile, Swing Gate, Drop bolt, Magnetic Lock; Keyking Group, Israel Technology
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No communication with RS-232 or RS-485 controllers

Possible Cause:
The Desktop reader software could be using the same port as the controller communication

Remedy:
Check and change the Desktop reader port, see the software manual, communications Section 7.8

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