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Wireless networks can be defined as a radio frequency communication link between two or more devices. Wireless networks utilizes different radio frequency to communicate, depending on the spectrum utilized.
The most commercially successful wireless network in history is the GSM cellular network, which operates on 900 and 1800 mhz frequencies. The GSM network is primarily designed to transfer voice and low bitrate data streams. The network is therefore not suitable for transferring large files and video streams.
Recent upgrades of cellular network has brought us 3G technology. 3G offers up to 2 mbps download speeds, but the upload speed is around 100 kbps.
Wireless Networking Standards
To offer higher bandwidths and the ability to operate on unlicensed frequencies, a range of wireless standards has been developed by the IT industry vendors. These efforts has happened separately from and in parallel with the Telecom industry developments of 3G and 4G networks. The result is a multitude of digital wireless networking standards that dominates todays wireless industry. These standards can be divided into four categories.
- Wireless USB
- Wireless HD (still draft)
- WiFi (wireless lan, wlan)
(1 000-10 000m)
- LTE (4g)
Extra Long Range
- NMT 450
- Point to point Radio links
Video Transmission over Wireless Networks
3G and GSM networks are not optimal for broadcasting video, because of the low upload rates. Wimax networks are still immature and Bluetooth offers too narrow ranges and scaleability. Wifi networks, on the other hand, offer a perfect blend of bandwidth, range, infrastructure equipment cost and cost of installation.
WiFi Video Conferencing
802.11g is the most common wireless lan standard. Still, the 802.11a and 802.11n standard offers some benefits over the 802.11g standard in terms of increased quality of service (qos) and less sensitivity to channel interference. Although 802.11g is more than suitable in most situations, the addition of 802.11n and 802.11a support increases the network capacity and increases stability, redundancy and scaleability.
Pixavi and Wireless LAN technology
Pixavi supports both 802.11g, 802.11b, 802.11a and the latest 802.11n standard. The increased bandwidths, range and quality of service enabled by the 802.11n standard offers a benefit over the other standards, but with a sacrifice in battery life. Therefore, we offer our products in both 802.11g and 802.11n configurations. Check out our intrinsically safe wi-fi , atex wi-fi, intrinsically safe camera, and wireless telepresence camera.