• Home
  • Archive
  • Tools
  • Contact Us

The Customize Windows

Technology Journal

  • Cloud Computing
  • Computer
  • Digital Photography
  • Windows 7
  • Archive
  • Cloud Computing
  • Virtualization
  • Computer and Internet
  • Digital Photography
  • Android
  • Sysadmin
  • Electronics
  • Big Data
  • Virtualization
  • Downloads
  • Web Development
  • Apple
  • Android
Advertisement
You are here: Home » How does a modem work?

By Abhishek Ghosh March 4, 2011 2:14 pm Updated on March 4, 2011

How does a modem work?

Advertisement

There are main two types of modems

The modem is a device used to connect the Internet using a telephone or dedicated line. There are two types of modems, one that is most widespread is the internal modem. It is located inside the casing and is located on a PCI slot.

The second is the external modem that is located outside the computer. It is connected to the PC via a cable. The advantage is that it is portable, it can be moved. How does a modem work?

Advertisement

---

Functions of a modem

The modem is used to translate information, it can modulate and demodulate (hence its name).

Modulation is to convert data sent and received by a computer on the telephone line (which are not directly understandable) into information that is compatible with the computer.

Demodulation is the reverse, it converts the data coming from the telephone line and received by the computer into information understandable by the latter.

 

Modulator: Computer -> Modem -> Phone Line

Demodulator: Phone line -> Modem -> Computer

 

Speed of a Modem

We obtain the speed modems by calculating the amount of information it can send and receive on the telephone line in a second. It is expressed in bits per second (bps). Very fast speed is expressed in kilobits per second (Kbps). So: 56000 bps = 56 Kbps.  Voiceband modems generally remained at 300 and 1,200 bit/s (V.21 and V.22) into the mid 1980s. A V.22bis 2,400-bit/s system similar in concept to the 1,200-bit/s Bell 212 signalling was introduced in the U.S., and a slightly different one in Europe. By the late 1980s, most modems could support all of these standards and 2,400-bit/s operation was becoming common.

The speed is usually expressed in Kbps or Mbps. There are standards designed for modems manufactured by different companies can communicate with each other without any problem.

There are high-end modems with extra features (voicemail, fax etc. …) but the price is high.

 

Radio modems

 

Direct broadcast satellite, WiFi, and mobile phones all use modems to communicate, as do most other wireless services today. Modern telecommunications and data networks also make extensive use of radio modems where longHow does a modem work-1 distance data links are required. Such systems are an important part of the PSTN, and are also in common use for high-speed computer network links to outlying areas where fibre is not economical.

 

Mobile modems and routers

 

Modems which use a mobile telephone system (GPRS, UMTS, HSPA, EVDO, WiMax, etc.), are known as wireless modems (sometimes also called cellular modems). Wireless modems can be embedded inside a laptop or appliance or external to it. External wireless modems are connect cards, usb modems for mobile broadband and cellular routers. A connect card is a PC card or ExpressCard which slides into a PCMCIA/PC card/ExpressCard slot on a computer. USB wireless modems use a USB port on the laptop instead of a PC card or ExpressCard slot. A cellular router may have an external datacard (AirCard) that slides into it. Most cellular routers do allow such datacards or USB modems. Cellular Routers may not be modems per se, but they contain modems or allow modems to be slid into them. The difference between a cellular router and a wireless modem is that a cellular router normally allows multiple people to connect to it (since it can route, or support multipoint to multipoint connections), while the modem is made for one connection.

 

Broadband

 

ADSL modems, a more recent development, are not limited to the telephone’s voiceband audio frequencies. Some ADSL modems use coded orthogonal frequency division modulation (DMT, for Discrete MultiTone; also calledHow does a modem work-2 COFDM, for digital TV in much of the world).

Cable modems use a range of frequencies originally intended to carry RF television channels. Multiple cable modems attached to a single cable can use the same frequency band, using a low-level media access protocol to allow them to work together within the same channel. Typically, ‘up’ and ‘down’ signals are kept separate using frequency division multiple access.

New types of broadband modems are beginning to appear, such as doubleway satellite and power line modems.

 

To summarize

  • The modem acts as a modulator and demodulator.
  • Speed is expressed in Kbps and Mbps.

 

Signature Tagged With how does a modem work , modem , how does modem work , how does a modem work? , how does a usb modem work , image of modem , picture of modem , haw does modem work , where modem is to be work , how does the modem work

This Article Has Been Shared 259 Times!

Facebook Twitter Pinterest

Abhishek Ghosh

About Abhishek Ghosh

Abhishek Ghosh is a Businessman, Surgeon, Author and Blogger. You can keep touch with him on Twitter - @AbhishekCTRL.

Here’s what we’ve got for you which might like :

Articles Related to How does a modem work?

  • On Demand in Computing : What On Demand Means ?

    On Demand in Computing, specially in Cloud Computing this word on demand is frequently used. On Demand has more than its literal meaning.

  • Databases in the Cloud : An Abstract

    Databases in the Cloud is an article where the concept as well as the various types and characteristics of cloud database provides a basic understanding.

  • Is Everything is Safe in the Cloud ?

    Is Everything is Safe in the Cloud ? We are representing here few popular systems and highlighting especially the security aspects of the Public Cloud services.

  • Comprehensive Cloud Security Strategy

    Comprehensive cloud security strategy in brief describes the key points of a perfect approach for cloud computing security. Written in plain simple English,.

  • What is Terminal?

    What is Terminal? A terminal console and a computer is for input and display of data. Terminals have been developed so far for the mainframe computers.

Additionally, performing a search on this website can help you. Also, we have YouTube Videos.

Take The Conversation Further ...

We'd love to know your thoughts on this article.
Meet the Author over on Twitter to join the conversation right now!

If you want to Advertise on our Article or want a Sponsored Article, you are invited to Contact us.

Contact Us

Subscribe To Our Free Newsletter

Get new posts by email:

Please Confirm the Subscription When Approval Email Will Arrive in Your Email Inbox as Second Step.

Search this website…

 

Popular Articles

Our Homepage is best place to find popular articles!

Here Are Some Good to Read Articles :

  • Cloud Computing Service Models
  • What is Cloud Computing?
  • Cloud Computing and Social Networks in Mobile Space
  • ARM Processor Architecture
  • What Camera Mode to Choose
  • Indispensable MySQL queries for custom fields in WordPress
  • Windows 7 Speech Recognition Scripting Related Tutorials

Social Networks

  • Pinterest (24.3K Followers)
  • Twitter (5.8k Followers)
  • Facebook (5.7k Followers)
  • LinkedIn (3.7k Followers)
  • YouTube (1.3k Followers)
  • GitHub (Repository)
  • GitHub (Gists)
Looking to publish sponsored article on our website?

Contact us

Recent Posts

  • What Online Casinos Have No Deposit Bonus in Australia March 30, 2023
  • Four Foolproof Tips To Never Run Out Of Blog Ideas For Your Website March 28, 2023
  • The Interactive Entertainment Serving as a Tech Proving Ground March 28, 2023
  • Is it Good to Run Apache Web server and MySQL Database on Separate Cloud Servers? March 27, 2023
  • Advantages of Cloud Server Over Dedicated Server for Hosting WordPress March 26, 2023

About This Article

Cite this article as: Abhishek Ghosh, "How does a modem work?," in The Customize Windows, March 4, 2011, March 30, 2023, https://thecustomizewindows.com/2011/03/how-does-a-modem-work/.

Source:The Customize Windows, JiMA.in

PC users can consult Corrine Chorney for Security.

Want to know more about us? Read Notability and Mentions & Our Setup.

Copyright © 2023 - The Customize Windows | dESIGNed by The Customize Windows

Copyright  · Privacy Policy  · Advertising Policy  · Terms of Service  · Refund Policy

We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
Do not sell my personal information.
Cookie SettingsAccept
Manage consent

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
CookieDurationDescription
cookielawinfo-checkbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
SAVE & ACCEPT