Point-to-multipoint and multipoint-to-multipoint configurations are also possible by connecting several units to the same local Ethernet network, and the device supports PoE (PD) if used with a PoE (PSE) Ethernet Switch. Typical Applications include: Commercial and residential AV systems; Classroom projector system; Digital signage Boardroom systems; Collaborative PC systems and Medical information systems. Note: This device supports PoE (PD), and is intended to be powered via a PoE (PSE) Ethernet Switch. If a PoE (PSE) Ethernet Switch is unavailable, then the power supply (500993) may be purchased separately.