What does the modem mean?

The modem translates into Chinese meaning. That is, our mouth often said "cat", it is the modulator and demodulator together collectively. A transformation interface that enables digital data to be transmitted over an analog signal transmission line.

The modem's role is to translate the digital signals of the computer into the pulse signals transmitted by ordinary telephone lines, which are then received by the modem at the other end of the line, which is translated into the language that the computer can understand. Completes communication between two computers.

The composition of modem, that is, the cat, his shape is a flat box, if the user is not a router is the use of the cat to network. As shown in the figure:

Computer knowledge

The Classification of modem:

1. External modem

The external modem is placed outside the chassis and is connected with the host through a serial communication port.

2. Built-in Modem

Built-in modem in the installation of the need to remove the boot box, and to the terminal and COM port settings, installation is more cumbersome.

3, PCMCIA Plug-in card modem

Plug-card modem is mainly used for laptops, small size. With mobile phone, can easily realize mobile office.

4, Frame-type modem

A rack modem is the equivalent of concentrating a set of modems in a box or enclosure and powering them with a unified power supply. Rack-type modem is mainly used for Internet/intranet, Telecommunications Bureau, Campus network, financial institutions, such as the center of the network room.

Modem Maintenance Suggestions:

1, the place is smooth, do not connect the wrong interface line, do not place in wet each other. Clean the dust and try not to let debris into the heat sink.

2, the use of voltage-stabilized power supply, wool needs is a two sockets, the power supply will have a certain space occupancy.