https://www.doorbird.com/downloads/datasheet_a1071_en.pdf
Doorbird Intercom 2-wire Ethernet PoE Converter A1071
$428.94
(GTIN/EAN: 4260423860360, P/n: 423860360)
Ethernet including PoE over 2 wires
Robust housing
Transmission range: 80 m / 262 ft
Up to 60 Mbit/s