What is modem ?
The name modem means modulator demodulator. A modem connects our computer to a standard phone line or to our cable, which allows us to send data or receive data.
A modem is a conversion device that converts signals from one device into signals another device can read.
For example,
a modem may covert the digital data of a computer into an analog signal that can be read and carried by a telephone line. The modulator part of the modem converts digital signals to analog signals, and the demodulator part converts analog signals to digital signals. ?
Your home internet connection medium will be either wireless or wired cables. When a wireless media or wired media transmits data it should be in analog form.
So the data you are transmitting or being transmitted to you is of analog form ie, timebased voltage variations, till it reaches your modem. So a modem converts those transmitted incoming analog signals to machine readable digital signals(digital signals are the signals that computers and electronic devices will accept or will generate) and outgoing digital signals to transmitable analog signals.
For transmission of a signal via a particular medium the signal needs to be modulated so that the frequency or amplitude or phase of the orginal wave can be changed to another amplitude or frequency or phase. The changing of the orginal frequency or amplitude or phase of the analog wave helps in better transmission and less noise while transmitting via the medium.
So a modem does another job too, to modulate orginal wave after converting it to analog form before transmission and to demodulate incoming transmitted wave before converting to digital form.
In short we define modem as follows:-
The name modem means modulator demodulator. A modem connects our computer to a standard phone line or to our cable, which allows us to send data or receive data. A modem is a conversion device that converts signals from one device into signals another device can read. For example, a modem may covert the digital data of a computer into an analog signal that can be read and carried by a telephone line. The modulator part of the modem converts digital signals to analog signals, and the demodulator part converts analog signals to digital signals.
What is wireless modem ?
A wireless modem is a special type of modem that have special functionality to skip the telephone system and connects directly to a wireless network in order to access Internet by multiple devices provided by Internet Service Provider.
Types of modem ?
1.Internal modem:-
A modem that plugs into an expansion slot within the computer. Unlike an external modem, an internal modem does not provide a series of display lights that inform the user of the changing modem states. The user must rely entirely on the communications program.
2.External modem:-
An external modem is a network device that is in a self-contained enclosure external to a computer. This is in contrast to an internal modem that is contained on a printed circuit board with a computer.
The name modem means modulator demodulator. A modem connects our computer to a standard phone line or to our cable, which allows us to send data or receive data.
A modem is a conversion device that converts signals from one device into signals another device can read.
For example,
a modem may covert the digital data of a computer into an analog signal that can be read and carried by a telephone line. The modulator part of the modem converts digital signals to analog signals, and the demodulator part converts analog signals to digital signals. ?
Your home internet connection medium will be either wireless or wired cables. When a wireless media or wired media transmits data it should be in analog form.
So the data you are transmitting or being transmitted to you is of analog form ie, timebased voltage variations, till it reaches your modem. So a modem converts those transmitted incoming analog signals to machine readable digital signals(digital signals are the signals that computers and electronic devices will accept or will generate) and outgoing digital signals to transmitable analog signals.
For transmission of a signal via a particular medium the signal needs to be modulated so that the frequency or amplitude or phase of the orginal wave can be changed to another amplitude or frequency or phase. The changing of the orginal frequency or amplitude or phase of the analog wave helps in better transmission and less noise while transmitting via the medium.
So a modem does another job too, to modulate orginal wave after converting it to analog form before transmission and to demodulate incoming transmitted wave before converting to digital form.
In short we define modem as follows:-
The name modem means modulator demodulator. A modem connects our computer to a standard phone line or to our cable, which allows us to send data or receive data. A modem is a conversion device that converts signals from one device into signals another device can read. For example, a modem may covert the digital data of a computer into an analog signal that can be read and carried by a telephone line. The modulator part of the modem converts digital signals to analog signals, and the demodulator part converts analog signals to digital signals.
What is wireless modem ?
A wireless modem is a special type of modem that have special functionality to skip the telephone system and connects directly to a wireless network in order to access Internet by multiple devices provided by Internet Service Provider.
Types of modem ?
1.Internal modem:-
A modem that plugs into an expansion slot within the computer. Unlike an external modem, an internal modem does not provide a series of display lights that inform the user of the changing modem states. The user must rely entirely on the communications program.
2.External modem:-
An external modem is a network device that is in a self-contained enclosure external to a computer. This is in contrast to an internal modem that is contained on a printed circuit board with a computer.
Good
ReplyDeleteBest experience
ReplyDeleteGood explain..
ReplyDeleteGood explain
ReplyDeleteGood explain
ReplyDelete