A new generation DSL transmits data at 1 Gb / c




In the telecommunications sector, there is the problem of connecting the end-user to the network, the problem of the so-called “last mile”. Currently, some ISPs may conduct fiber directly to the apartment, but this method is costly to rebuild equipment. Engineers have developed a new technology standard DSL-G.fast, capable of a speed comparable to the speed of data transmission over fiber.

Modern standards of DSL-technology capable of providing broadband connectivity through existing telephone lines using a special method of signal modulation. When using this method on the same line are simultaneously transmitted and the digital data stream and the analog voice stream. Such a possibility is achieved by flow separation in frequencies: the voice is transmitted at frequencies from 30 Hz to 4 kHz, and the data in the range of 25 kHz to 1.1 MHz, reports gizmodo.com.

There is also a standard VDSL2, which can transmit data at speeds up to 100 megabits when the signal bandwidth of 30 MHz. But this standard has some significant drawbacks that do not allow wide use of it in practice.

Designed G.fast standard can transmit data at a speed of 1 gigabit per second thanks to its bandwidth, which is 106 MHz. However, this standard also has its drawbacks. Since the upper part of its range overlaps the FM range, that could be a problem in some situations. Likely to cause interference, generated by the two cables lying next.

These deficiencies can lead to that providers will halve G.fast bandwidth and to limit the maximum speed of 500 Megabits per second. But in spite of this limitation, a new standard far exceeds the current-generation DSL.

Closing is expected to develop as early as next year, and to create the necessary telecommunications equipment can be expected in 2016.
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