A special purpose networking device that permits a computer to send and receive networking signal, primarily for Internet access, by using two data channels on a broadband CATV network (one to send outgoing data, the other to receive incoming data). Cable modems can support bandwidth up to 1544 Mbps but its more typical to observe upstream traffic (from computer to network) between 100 and 300 Kbps and downstream traffic (from network to computer) between 300 and 600 Kbps.
Cable modem is a new device use to receive data from the Internet by a cable television cable.
Cable modem means allows transmission of internet traffic over the cable TV wire connected to the home. The speed of transmission over a cable modem ranges between 500 Kbps and 2.5 Mbps.