Power over Ethernet (PoE, EEE 802.3af-2003) is a cleber standard to supply ethernet connected devices, with power up to 15,4 Watt per PoE network switch port. The supply voltage are transmitted within the same ethernet cables as the data stream, and thereby only one CAT cable is needed, for e.g. IP cameras, Wi-Fi access points, door stations etc. The PoE standarden has been further developed into the PoE Plus/+ version (IEEE 802.3at-2009), which can delivery up to 25,5 Watt pr. connection, and are often utilized for HD network IP cameras.
Powered Zone 2 is a feature predominantly found in surround receivers with a minimum of 7 powered channels. It allows a set of speakers in an adjacent room to be connected and playing select audio sources, without interfering with the main surround setup.
The device needs a separate adaptor in order to connect to a wireless network. Often adaptor and device need to be from the same manufacturer. The feature is rarely seen anymore, as implementation of Wi-Fi becomes easier and less costly.
Wi-Fi wireless LAN build-in
The device can connect to a wireless network out of the box, either through a built-in function, or through an adaptor included in the packaging.
WiSA - Wireless Speaker & Audio
The Wireless Speaker & Audio (WiSA) Association is an industry group dedicated to implement wireless technology into stereo- and surround sound speakers, control boxes and televisions. The vision is to rid the installation of speaker wires and clunky AV receivers, while achieving quality audio and stable, synchronized connection.
WiSA can be freely adopted by any manufacturer who wishes to do so. Among the first movers are Klipsch and B&O. Now also TV manufacturers are also beginning to implement WiSA wireless sound directly in flatscreens, making it easy to connect active wireless Hi-Fi WiSA speakers to the TV without cables.