A conference call is a call in which calling person wants to communicate with more than 1 person simultaneously. In simple words, if three or more are talking together via any medium audio, video or internet then it is considered as a conference call. The conference call may be designed to allow the called party to also talk during the call, or the call may be set up so that the called party merely listens into the call but cannot speak.
Some conference calls are set up where the calling party calls the other participants and adds them to the call, and in some cases the other participants call into the conference call, either by dialing into a "conference bridge", a specialized type of telephone that answers multiple calls, or by using a special telephone number set up for that purpose.
Conference calls can be used for entertainment or for social purposes. People call in to a specified telephone number which allows them to talk to others, serving as a way to talk to and perhaps subsequently meet new people. Conference calls are most commonly used by businesses.
Conference calls are used by nearly all big companies to report their quarterly results, usually also allowing questions from stock analysts. These are called earnings calls. The CEO or CFO, or the Investor Relations officer read a report on how the company did that quarter. Finally the call will be usually opened up for questions from analysts.
Audio conferencing
In audio conferencing 3 or more people can talk to each other using telephone but they Can not Show anything to each other, despite that this is the most used way of conferencing for social purposes as well as big companies because it is cheap and in most cases suffice their need. More details here
Video conferencing
In video conferencing, caller and called can talk as well as see each other So people can express themselves in a better way and put up their point strongly. Video conferencing is becoming popular now a days and is being extensively used for recruitment and dealing with customer. More details here
Web conferencing
In web conferencing, caller and called party can talk to each other as well as they can share their computer application. So it provides a way for them to look on some presentation, report or to work on some application simultaneously. Web conferencing is also emerging a new and cheap way of conferencing. More details here
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