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Akuvox R20A 2 2 Wire SIP Video Door Phone 8MP Phone support on NVR compatibility Detector:None Phone support on NVR compatibility 265 dual stream compression The Akuvox R20A 2 provides a high performance entry solution for modernising door security over 2 wire cabling Power Supply Requirement: The R20A 2 requires a dedicated 48V DC 2 wire power distributor switch (such as the Akuvox NS 2) to deliver power and data over 2 wires
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