difference between modem,broadband & multiplexer?

Answer 1

MODEM
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is a device which connects the computer to the internet.
Modem stands for "modulator-demodulator." It uses sound to carry data over the analog voice network. By changing frequencies it is able to indicate different types data to a modem on the other side of the connection. It is basically a device that converts digital (1 and 0) into analog sound frequencies and then reconverts it sound back to digital on the other side.

there are two types of Modems
1) internal
2)external
internal is available in every computer and this is for dial-up internet or so called as 56kbps
whereas external modem is provided by the company and this internet is of a very high speed.in this kindof modem the company registers ur name in the modem and configures it so that u can use.Its also called as t1/LAN

Broadband
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Broadband in general is a term which refers to a signaling method which includes or handles a relatively wide range of frequencies which may be divided into channels or frequency bins
Broadband in data communications may have the same meaning as above, so that data transmission over a fibre optic cable would be referred to as broadband as compared to a telephone modem operating at 600 bits per second.

BUT i think you mean DSL/ADSL frm broadband modem,so there its...

DSL or xDSL, is a family of technologies that provide digital data transmission over the wires of a local telephone network. DSL originally stood for*[ Digital Subscriber Loop ]*.

Typically, the download speed of DSL ranges from 128 kilobits per second (kbit/s) to 24,000 kbit/s depending on DSL technology and service level implemented. Upload speed is lower than download speed for Asymmetric Digital Subscriber Line (ADSL)
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and equal to download speed for Symmetric Digital Subscriber Line (SDSL).

What Happens When You Use DSL
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This is the general order of what happens from the time you power up your modem to the time you begin surfing. Your modem is hooked up to a cable or phone line connection depending on the DSL service of choice. This process varies from modem to modem, but is generally as such:

1. Your modem does a self-test.
2. Your modem checks your connection from the modem to your computer (usually the ethernet port, or a USB port).
3. Your modem attempts to synchronise with the DSLAM. Data can only come into your computer when the DSLAM and your modem are synchronised.

[[ Since this requires wiring changes by the customer and may not work on some (poorly designed) household telephone wiring, it is rarely done. It is usually much easier to install filters at each telephone jack that is in use.At the exchange, a digital subscriber line access multiplexer (DSLAM) terminates the DSL circuits and aggregates them, where they are handed off onto other networking transports. It also separates out the voice component. ]]


you can see its done with help of technique called Multiplexing

MULTIPLEXING
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Multiplexing (also MUXing) is a term used in electrical engineering to refer to a process where multiple sources of information are combined in order to ease the organization, conversion, and transportation of the material from one place to another.

In telecommunications, multiplexing is the combination of two or more higher-level channels into a single lower-level channel such that a reverse process, known as inverse multiplexing.

Significantly fewer wires and for much further distances than a customer's line can practically go down with help of MULTIPLEXER


OR in simple words Multuplxer is...
( Many inputs --to-->> one output)

inputs*
------------>--l~~~~~~~~~l
------------>--l MULTIPL- l
------------->-l- -i XER ----- l---------->>single output
------------->-l --------------- l
~~~~~~~~~~



--single----- l~~~~~~~~~~~l----------->>
------------>>l DEmultiplexer l------------>> many outputs
----inputttt-- l -------------------l------------->>


hope this would help!! :)

Answer 2

Difference Between Modem And Broadband

Answer 3

Modem :- A device that converts the digital signal from a computer to an analogue signal that can be transmitted along an ordinary phone line. This allows computers to connect to the Internet through a telephone line.

Broadband :- A transmission medium capable of supporting a wide range of frequencies, typically from audio up to video frequencies. It can carry multiple signals by dividing the total capacity of the medium into multiple, independent bandwidth channels, where each channel operates only on a specific range of frequencies.

Multiplexer :- A device that can send several signals over a single line. They are then separated by a similar device at the other end of the link. This can be done in a variety of ways: time division multiplexing, frequency division multiplexing and statistical multiplexing. Multiplexers are also becoming increasingly efficient in terms of data compression, error correction, transmission speed and multi-drop capabilities

Answer 4

Modem: Short for modulator-demodulator. A modem is a device or program that enables a computer to transmit data over, for example, telephone or cable lines. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves. A modem converts between these two forms.

Broadband in general electronics and telecommunications is a term which refers to a signaling method which includes or handles a relatively wide range of frequencies which may be divided into channels or frequency bins. Broadband is always a relative term, understood according to its context. The wider the bandwidth, the more information can be carried. In radio, for example, a very narrowband signal will carry Morse code; a broader band will carry speech; a yet broader band is required to carry music without losing the high audio frequencies required for realistic sound reproduction. A television antenna described as "normal" may be capable of receiving a certain range of channels; one described as "broadband" will receive more channels. In data communications a modem will transmit a bandwidth of 64 kilobits per seconds (kbit/s) over a telephone line; over the same telephone line a bandwidth of several megabits per second can be handled by ADSL, which is described as broadband (relative to a modem over a telephone line, although much less than can be achieved over a fibre optic circuit, for example).

A multiplexer (or mux or, more rarely, muldex) is a device that encodes or multiplexes information from two or more data sources into a single channel. They are used in situations where the cost of implementing separate channels for each data source is more expensive than the cost and inconvenience of providing the multiplexing/demultiplexing functions. In a physical analogy, consider the merging behaviour of commuters crossing a narrow bridge; vehicles will take turns using the few available lanes. Upon reaching the end of the bridge they will separate into separate routes to their destinations.

Hope I answered your query

Answer 5

difference???? no connection altogether modem is a modulator demodulator used for changing analog to digital n vice versa broadband is a connection a bandwidth n multiplexer is used to multiply a signal that is send the signal over diff lines wat is the similiarity in them tht u ask 4 diff

Answer 6

No connection at all....i agree to answer of kaushik ...its all diffrent!!!!!!!!what is similarity...????????????????????????????????????