The difference between adsl broadband and fiber optic broadband: 1. Copper ADSL is a type of DSL technology, and fiber optic broadband FTTH is also an asymmetric digital line; 2. ADSL is a telephone line to the home, and fiber optic broadband is Fiber optic cable to the home.
#The operating environment of this article: Windows 7 system, Dell G3 computer.
The difference between adsl broadband and optical fiber broadband:
1. The media are different. Copper ADSL is a type of DSL technology, an asymmetric digital subscriber line, and its carrier is a telephone line. Optical fiber broadband FTTH is also an asymmetric digital line, but the transmission medium is optical fiber. This is the most fundamental difference between the two.
2. The transmission rates are different. ADSL in DSL technology can theoretically provide transmission at 1M uplink and 8M downlink rates. In fact, due to the loss of telephone lines and the increase in distance from the central office, ADSL usually has a maximum downlink rate of 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 in downlink bandwidth, and its uplink bandwidth is almost the same as ADSL. Theoretically, the G port bandwidth can be supported under secondary optical splitting.
3. The transmission distance is different. Electrical signals carried on copper wires are not as stable and farther than optical signals carried on glass fibers or quartz fibers. The current mainstream EPON mode optical fiber can achieve micro-attenuation for thousands of kilometers, which is beyond the reach of copper ADSL.
4. ADSL is a telephone line to the home, and fiber optic broadband is an optical fiber line to the home. The difference between copper ADSL and fiber optic broadband is roughly the same. It is worth mentioning that there is a difference between FTTH (fiber to the home) and FTTB LAN (fiber to the building, network cable to the home). They cannot be confused. FTTB cannot be said to be strictly speaking. Fiber to the home, we will discuss this in detail in a future article.
Related free learning recommendations:Programming videos
The above is the detailed content of What is the difference between adsl broadband and fiber optic broadband?. For more information, please follow other related articles on the PHP Chinese website!