As far as access methods are concerned, there are two kinds of broadband cats: one is telephone modem;
Surfing the Internet through telephone lines, the sender converts digital signals into analog signals through modulation, and the receiver converts analog signals into digital signals through demodulation. At present, this way of surfing the internet has basically withdrawn from the historical stage.
Second, the optical fiber modem (fiber cat):
Optical fiber cat refers to a transceiver that converts optical Ethernet signals into signals of other protocols. Optical fiber cat is the common name of optical modem, which has the function of modulation and demodulation. Optical fiber cat, also known as single-port optical transceiver, is a product designed for special user environment. It uses a pair of optical fibers for single E 1 or single V.35 or single 10BaseT point-to-point optical transmission terminal equipment. As the relay transmission equipment of local network, this equipment is suitable for optical fiber terminal transmission equipment and private line equipment of base station.
At present, one of the main access modes of home broadband is more stable and faster than network cable access.
The difference between slim cats and ordinary cats: 1, the difference in appearance.
The above picture 1 and figure 2 are the comparison pictures of a lighter cat and an ordinary cat. Through this comparison chart, we can clearly see the difference between the two.
2. Disagreements in principle
The optical fiber cat converts the optical Ethernet signal of the optical fiber into an electronic signal that can be recognized by the computer. Ordinary cats convert analog signals in telephone lines into electronic signals.
3. The particularity of access is different.
Unlike telephone lines, optical fibers cannot be bent at will. In engineering, optical fiber wiring is generally not allowed to take a 90-degree right-angle bend, and the optical fiber should not be bent and squeezed at will when it gets home. If you look carefully, you will find that you will try to keep the curvature of the corner of the house above 120 degrees.