pctechguide.com

  • Home
  • Guides
  • Tutorials
  • Articles
  • Reviews
  • Glossary
  • Contact

Serial Communications

The need to communicate between distant computers led to the use of the existing phone network for data transmission. Most phone lines were designed to transmit analogue information – voices, while the computers and their devices work in digital form – pulses. So, in order to use an analogue medium, a converter between the two systems is needed. This converter is the modem, which performs MOdulation and DEModulation of transmitted data. It accepts serial binary pulses from a device, modulates some property (amplitude, frequency, or phase) of an analogue signal in order to send the signal in an analogue medium, and performs the opposite process, enabling the analogue information to arrive as digital pulses at the computer or device on the other side of connection.

PCs have always provided the means to communicate with the outside world – via a serial communications port – but up until the 1990s, it was a facility that was little used. The ability to access bulletin boards and to communicate via fax did attract some domestic users, but in general a modem was considered as a luxury item that could be justified only by business users. The tremendous increase in the popularity of the Internet has changed all that in recent years and nowadays the ability to access the World Wide Web and to communicate via email is regarded as essential by many PC users.

  • Modems
  • Modulation
  • Communication Speed
  • Serial Ports
  • Fax Modems
  • Voice Modems
  • Communication Standards
  • 56Kbps Modems
  • V90 Technology
  • V92 Technology

PC Components | Processors (CPUs) | PC Data Storage | PC Multimedia | PC Input/Output | Communications | Mobile Computing

20 Cool Creative Commons Photographs About the Future of AI

AI technology is starting to have a huge impact on our lives. The market value for AI is estimated to have been worth $279.22 billion in 2024 and it … [Read More...]

13 Impressive Stats on the Future of AI

AI technology is starting to become much more important in our everyday lives. Many businesses are using it as well. While he has created a lot of … [Read More...]

Graphic Designers on Reddit Share their Views of AI

There are clearly a lot of positive things about AI. However, it is not a good thing for everyone. One of the things that many people are worried … [Read More...]

Redditors Talk About the Impact of AI on Freelance Writers

AI technology has had a huge impact on our lives. A 2023 survey by Pew Research found that 56% of people use AI at least once a day or once a week. … [Read More...]

11 Most Popular Books on Perl Programming

Perl is not the most popular programming language. It has only one million users, compared to 12 million that use Python. However, it has a lot of … [Read More...]

10 Exceptional Books on ChatGPT that Will Blow Your Mind

ChatGPT is a powerful new AI tool that is taking the world by storm. You are going to find a lot of amazing books that will teach you how to make the … [Read More...]

Guides

  • Computer Communications
  • Mobile Computing
  • PC Components
  • PC Data Storage
  • PC Input-Output
  • PC Multimedia
  • Processors (CPUs)

Recent Posts

5 Tips to Improve Your Data Security

In this day and age, data breaches are a major concern for many businesses across the globe. In the first six months of 2019, 4.1 billion records were … [Read More...]

Effective Search on Google Drive

Google Drive is one of the most useful web apps available to them. Many view it just as storage, but it can do so much more. You can create documents, … [Read More...]

Getting Started With Resizing Images in Photoshop

Our most recent article delved into some of the nuances of Photoshop. We gave you a basic primer on some of the core features, such as using layers. … [Read More...]

[footer_backtotop]

Copyright © 2025 About | Privacy | Contact Information | Wrtie For Us | Disclaimer | Copyright License | Authors