Fax

Fax is short for ‘facsimile’ which means ‘copy’.

A fax machine is a device that can send a copy of a paper document over the telephone network.
  • The sending fax converts the light/dark areas of the printed document into noises.
  • These noises travel through the phone system and are received by another fax machine.
  • The receiving fax machine converts the noises into printed marks on a piece of paper - making a copy of the original document.
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E-Mail

E-mail is a system that allows messages to be sent and received by computers. E-mail is the most common form of electronic communication.

E-mail messages are text-based, but other types of file can also be sent as ‘attachments’.

An e-mail message usually has the following parts:
To send and receive e-mail, you need to have an e-mail address.

An address is made up of two parts: a username and an e-mail provider, with an '@' symbol in the middle:

username@provider

To The address(es) of the person who the message is for
Subject A short sentance describing what the message is about
Message The text of the message. This can be as long as you like
An e-mail may also include the following parts:
CC The address(es) of people to copy the e-mail to (Carbon Copy)
BCC The address(es) of people to copy the e-mail to without anyone else knowing (Blind Carbon Copy)
Attachments Files linked to the message (images, documents, etc.)
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Video Conferencing

Video-conferencing is a system that allows people to have conversations and meetings with other people in different locations, but without leaving their office.

A video-conference involves people sitting in front of a camera and a microphone, whilst watching other people of a screen and listening to them through loudspeakers.

Note: The camera is usually TV quality - must better than a standard webcam.
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The system uses the following hardware:
  • Video camera
  • Monitor
  • Microphone
  • Loudspeakers
  • High-speed network / Internet connection
Video conferencing is very popular with businesses as it means:
  • No travel costs
  • No time wasted travelling to other cities / countries
  • Can organise meetings at short notice
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