Large office buildings and warehouses use analog phones at remote access points beyond the reach limit of 2-pair Ethernet. The newer 2-wire Ethernet has much greater reach and can provide PoE to the remote device, such as a VoIP door box. Sounds like a good idea, but my searches don’t turn up any such 2-wire VoIP device. Are there alternative ways to replace an analog phone with a VoIP unit using the existing wiring (probably Cat3)?

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