The function allows the user by entering a 5-digit number to receive a call from any concrete company’s telephone. There are no definite groups for picking up the call. One can pick up the call from any telephone set; it is only necessary to enter the required code and the extension number of the phone, which has to be picked up.
The service that most owners look for is VoIP or voice over internet protocol. This service allows the user to make long distance calls using the standard internet connection