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Zigbee is an IEEE 802.15.4-based specification for a suite of high-level communication protocols used to create personal area networks with small, low-power digital radios, such as for home automation, medical device data collection, and other low-power low-bandwidth needs, designed for small scale projects which need wireless connection.
Many Zigbee/IEEE 802.15.4-based wireless data networks operate in the 2.4–2.4835 GHz band, and so are subject to interference from other devices operating in that same band. The definition is for 16 channels numbered 11–26 to occupy the space, each 2 MHz wide and spaced by 5 MHz.
One-way and two-way telecommunication using communications satellite; Terrestrial microwave relay links in telecommunications networks including backbone or backhaul carriers in cellular networks; More recently, microwaves have been used for wireless power transmission.
A cell phone connected to a laptop using the USB interface, letting them communicate with each other, is a simple example of a wired personal area network (PAN). Wired personal area networks provide short connections between peripherals.
True 3G systems such as EV-DO, W-CDMA (including HSPA and HSPA+) provide combined circuit switched and packet switched data and voice services from the outset, usually at far better data rates than 2G networks with their extensions. All of these services can be used to provide combined mobile voice access and Internet access at remote locations.
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Zigbee; Standardisation Proprietary Proprietary Standard Standard Standard Topologies Point-to-point, star, tree, mesh [3] Mesh: Point-to-point, scatternet Point-to-point, star, mesh Mesh Band 2.4 GHz 2.4 GHz and 900 MHz (varies slightly per country) 2.4 GHz 2.4 GHz 2.4 GHz (+ sub-GHz for Zigbee PRO) Range 30 metres at 0 dBm [11] 10–100 metres
This 2023 model improves on the already-great 2021 version in a few ways: It has a faster processor and support for more smart-home devices (namely those compatible with Matter, Thread and Zigbee).