The Callback Service is based on the principle whereby people are provided with an extension number that allows them to connect instantly with VoIP service providers. This call back service is made simple and convenient with its easy billing procedures.

Callback is possible in VoIP due to the presence of calling cards. This card can be purchased from any place of the world. The instant accessing of the card makes it possible to establish VoIP connection very easily. The user is motivated as the services offered by the VoIP service providers are known for their excellent facilities and high sound quality. This system of VoIP callback functions by means of access numbers. The access numbers are acquired by the customer from the service provider. This number enables users to access VoIP network at a reasonably cheap calling rate.

Virtual calling cards are known to provide international callback service with the best possible sound quality. The VoIP service thus can be accessed with all the latest facilities. The user of VoIP can make calls to people living at any place in the world. This callback service has its own methodology of functioning. There is a trigger number for the user to dial. Once the number is dialed the customer receives a call from the service provider. On receiving the call the users are instructed to dial the destination number. Once the number is dialed, it helps establish the connection. Once the call is over, the user now has to dial # in order to make a second call. This relieves people from the headache of making repeated calls to the service providers for the sake of making large number of calls at the same time. It is also a fact that on receiving a VoIP call the user need not have to pay for any call charge.

The callback system is integrated with some salient features. This method of call making is based on services like ANI, SMS and web based call back. The VoIP based communication system helps to route the message. Thus International Callback Service becomes easy with this system in place. Billing procedure is also simple in Voice over IP. The online billing portals allows users to pay their bills very conveniently.

The most fascinating thing about call back service is that it is not restricted to laptops or computers. Mobile phones or landline phones are brought to use in order to avail the service. The internet connection is always a pre-requisite for the availing of VoIP network. The user can also make use of the International callback service to make long distant calls. For faster dialing there is the speed dialing option.