Patent ID: 6337903
Filing Date: 2002-01-08
Classification: H04M

Abstract:
A method for setting up a call in a telephone network using a predetermined right of use of the telephone network, in which method the subscriber number of the calling subscriber and the subscriber number of the called subscriber are sent into the telephone network and the calling subscriber's right of use is verified before the call is set up, comprising:adding a character string to the called subscriber number to be sent into the telephone network in conjunction with call setup for establishing from said character string in the telephone network that the caller is a calling subscriber who is utilizing a predetermined right of use and said character string comprises a calling subscriber-specific identifying code (PIN) corresponding to the calling subscriber number; verifying the calling subscriber's right of use in the telephone network on the basis of the calling subscriber-specific identifying code by comparing the identifying code (PIN) sent in conjunction with call setup with the identifying codes corresponding to the calling subscriber number; if the identifying code is correct checking the calling subscriber's remaining right of use and, if no right of use remains, giving a corresponding notice to the calling subscriber and terminating call setup; and if the calling subscriber has a remaining right of use, then continuing the call setup process between the calling subscriber and the called subscriber in the normal way.