EVDO product Quality

EV, also known as EV-DO and 1xEV-DO 1xEvDO is a standard in high-speed wireless broadband. EVDO stands for "Evolution Data Only " or Evolution, data optimized. "The term officially issued by the Telecommunications Industry Association that is CDMA2000, is a high-speed data interface on air media. EVDO one of two major wireless standard 3rd generation or 3G. the other is now the standard W-CDMA.

Designs to increase speed 3G data and voice network using a cellular phone that has been there. Where, the main obstacle to implementing high-speed wireless network is the lack of bandwidth, or range of frequencies that can be used. With the number of radio frequency can be reduced / streamlined on the FM wave, it is not too much data it can memnfaatkan bandwidt. EVDO which developed the technology developed by Qualcomm to solve these problems.

CDMA, coded division multiple access, use mathematical methods to be able to pass multiple wireless devices to send data simultaneously on the same frequency. Each device, such as cell phones, marked with a unique mathematical. Signs Unique was applied to original signal and sent as a modified signal. Recipients also apply mathematical inverse sign of the signal sent to get the original signal.
Wireless Networking formerly utilize a barrier between the sender and receiver, like most traditional phone. EVDO, as his successor to adopt the same approach to the Internet. IP, Internet Protocol, breaking the data on the small fraction which was then called packets. Each packet sent independently of the other packages. Of course this will save bandwidth allows use by another device, when there was no phone conversation is also certainly no packets that pass because there is no packet sent. or when a web site accessible, there will be no bandwidth is used until the site began to send web pages.

In theory capable of passing 2.4 EVDO megabits per second. Of course it's faster than DSL and cable broadband available. In a video conference in America, which is used by someone who was inside the vehicle at a speed of 60 miles per hour (90km/jam), while in others a phone demo a try from a bullet train that moves beyond 150 miles / hour (240 km / hours).
The advantages of CDMA EVDO than usual, certainly more mengirit frequency spectrum of the regulator and very expensive of course, reduce the cost of developing and utilizing the new network. in united EVDO used by Verizon and Sprint, in Korea is also used. When this article was made EVDO not very influential in the European market and the majority of Asia because the region is already chose 3G as their choice. Similarly in Indonesia, however there are several operators who use the EVDO technology.
part of this paper is a translation from: http://id.wikipedia.org/wiki/EV-DO