What is the difference between fiber broadband and ADSL?

Ordinary broadband is generally made of copper wire, but the speed of using the wire to transmit network signals is very slow. In contrast, fiber optics transmit signals much faster.

The advantages of fiber optic communication are:

1. Large capacity.

2. Attenuation.

3. Fast speed and stability.

4. Small size and light weight. Conducive to construction and transportation.

5. Good anti-interference performance. The optical fiber is not subject to strong electrical interference, electrified railway interference and lightning interference, and has strong anti-electromagnetic pulse ability and good confidentiality.

6. Save non-ferrous metals. (General communication cables consume a large amount of non-ferrous metals such as copper, aluminum or lead) 7. Low cost. Optical fiber communication was first used in optical fiber relay lines between the city's first bureaus, and then widely used in long-distance trunk networks, becoming the basis of broadband communication.

Ordinary broadband doesn't have that.

What is the difference between fiber broadband and ADSL broadband?

1. The medium is different. Copper wire ADSL is a kind of DSL technology, which is an asymmetric digital subscriber line, and its carrier is ** line. Fiber broadband FTTH is also an asymmetric digital line, but the transmission medium is fiber optic fiber.

This is the most fundamental difference between the two.

2. The transmission rate is different. The ADSL technology in ADSL technology can theoretically provide transmission at 1M uplink and 8M downlink rate, but in fact, due to the loss of the ** line and the increase of the distance from the end of the office, ADSL usually has a downlink rate of up to 4M. Other higher-speed transmission technologies such as ADSL2+ and VDSL are rarely used in daily life and will not be mentioned in this article.

Compared with ADSL, optical fiber has almost no bottleneck of downlink bandwidth, and the uplink bandwidth is almost the same as ADSL. Theoretically, the second-level optical fraction can support the bandwidth of the G port.

3. The transmission distance is different. The electrical signal carried on the copper wire is more stable and farther than the optical signal uploaded by the glass fiber or quartz fiber. At present, the mainstream EPON optical fiber can achieve 1,000 kilometers of microattenuation, which is not possible with copper ADSL.

4. ADSL is the first line to the home, and optical fiber broadband is the fiber line to the home. The difference between copper wire ADSL and fiber broadband is roughly like this, in particular, FTTH (fiber to the home) and FTTB + LAN (fiber to the building, network cable to the home) are still different, can not be confused, FTTB can not be said to be fiber to the home in the strict sense, this we will discuss in detail in future articles.