Modem stands for Modulation Demodulation. A modem converts the digital data signals into analogue data signals. They can be installed within the computer in a development slot applicable for it.
There are frequently two types of Modems that are as follows −
The standard modems use generic device drivers, and they can be internal and external ones. The internal modems do not need much physical structure. They can be installed into a compatible development slot. The external modem is connected through one of the COM port to the computer through a cable called a null-modem cable.
A window modem is a private plug and plays tool. It requires a particular device driver supported by the window operating framework to function correctly.
The main features of modems are as follows −
There are the following types of modems which are as follows −
Optical Modem uses optical cables instead of other metallic media. It converts the digital data signals into the pulse of light transmitted on the optical fiber used by it.
A digital modem converts digital data into digital signals. It modulates the digital data on the digital carrier signals for transmission on digital transmission lines.
The acoustic modem is a particular type of modem that can couple the telephone handset with a device used by traveling salespeople to connect the hotel phones. It contains a speaker and microphone.
The smart modem allows auto-dial/redial and auto-answer capabilities. It contains a microprocessor onboard that uses the Hayes AT command set to provide auto-dial and auto answering functions.
The short-haul modem is those who are present in your PC at home. They can transmit data over 20 miles or less, and generally, they are used to connect PCs in a building or office within this area.