Conference calls are avidly used and have found different usage among individuals, different niche service providers and across businesses. But not all of them use the same kind of service. Here are four different kinds you may not know about.

* Prepaid conference calls: This kind of conference service allows individuals and businesses to purchase call services online and talk to many people simultaneously until the payment made is emptied. This can be used with a landline, mobile phone or a computer device. No additional equipment is needed to conduct the conference.
* Flat Rate conference calls: these services allow the subscriber to make unlimited calls on paying up a certain subscription fee every month. This service has found wide usage in telemarketing and other business sectors which makes use of telephone avidly.
* Toll Free conference calls: These calls allow the callers to make calls free of cost. The one who is receiving the call is the one who pays for the call. Of late a number of service providers have started using this service. This is done in order to encourage potential customers to call and make an enquiry even if they do not have an intention to avail the service or buy a product right away. The calls may eventually entice them to buy.
* Premium conference calls: the charges on these calls are high. They begin with the prefix '09. The charges of the call is paid by anyone who hosts it. The security on this is high. This service is often chosen by high profile people like celebrities, sports stars, business tycoons etc. Anyone who calls adds value to the call that justifies the premium price tag.

Author Bio:
I am a programmer working for a conference call service provider company which provides various conference call services including audio conferencing services, Video conferencing services and web conferencing services.