What is a Cable Modem?

Cable modem (Cable Modem, CM), Cable refers to the cable television network, Modem is a modem. The modem is usually used to connect to the Internet through a telephone line, and the cable modem is a device used to connect to the Internet on a cable TV network. It is connected in series between the user s cable TV cable outlet and the Internet access device. The other end of the connection is at a cable TV station (called the head-end). It modulates the uplink data to be uploaded by the user at a frequency of 5-65M in QPSK or 16QAM modulation mode and transmits it upward, with a bandwidth of about 2-3M and a rate from 300 to 10Mbps. It demodulates the downlink data sent from the headend in 64QAM or 256QAM, with a bandwidth of 6-8M, and a rate of up to 40Mbps.

Cable modem

Cable modem (Cable Modem, CM), Cable refers to the cable television network, Modem is a modem. Usually used Modem
Cable modem is also called cable modem, and its English name is CableModem. It has been developed in recent years with the expansion of network applications. It is mainly used for data transmission in cable television networks. Cable Modem
The cable system was originally designed to efficiently deliver TV programs to users' homes. To ensure that consumers use the same
Cable Network Resource Potential
From the existing
A cable modem is a device that connects a data terminal device (computer) to a cable television network to enable users to perform data communications to access information resources such as the Internet. With the expansion of network applications, cable modems have developed rapidly, and are mainly used for data transmission in post and television networks. Its main function is to modulate digital signals to radio frequency and demodulate digital information in radio frequency signals. In addition, the cable modem also provides a standard Ethernet interface, which partially completes the functions of bridges, routers, network cards, and hubs. Therefore, it is more complicated than traditional PSTN modulators.

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