A Conference Call is usually needed for those organizations that need more then one calling party to listen to their talk. In these types of telephone calls the calling party often interacts with one party and is so designed that another party can listen to the call.

The telephone call is usually a two way process where one party calls and the other party responds but in a Conference Call more than party can listen to the call. It can be set up in two ways. A Conference Call can be set up in two different ways. It can be so set up that the called party can only listen to the call or it may also be designed in such a way that the third party is able to interact with the other participants in the call. These kinds of calls that are set up are usually called Audio Tele-Conference or ATC calls. There are also such modes where some of the callers can call in themselves and get added to the Conference Call automatically so that they can participate in the conference that is going on. This automatic log in is done with the help of a conference bridge. This is a particular kind of electronic equipment that connects different phone lines together. The participants have to call into a conference bridge or what they can also do is they can use a particular number to call that would be set up especially for providing

this service.
Many of the organizations and companies that use the facility of the Conference Call take it from a service provider. These service providers are specially equipped with the kind of facilities and advanced technology that is required for a Conference Call. The service providers have to offer a conference bridge and also different telephone numbers that are needed to gain entry to a meeting or a conference via a Conference Call. A Conference Call is also termed as a three way call and is provided by the service provider usually at an extra charge to the customer. These services are provided either to the customer at his home or to offices on their phone lines. In these services the caller is allowed to add up a second out going call to the call that is already connected to another call. These Conference Calls can be used by various organizations. Varieties of businesses use the conference call facility in order to connect to those clients who are located very far. Communication becomes real easy when it is done through the system of Conference Calls. For both internal operations within the organization and communication outside the company a Conference Call is a wonderful application that can prove to be very useful. When one is doing a sales presentation, or team meetings are organized for individuals who are working for the same company but in different locations.

Source:http://www.encyclocentral.com