THIS INVENTION REFERRES TO A SOLUTION TO THE PROBLEM OF PROVIDING CCBS SERVICES ON GVNS. IN A NETWORK SERVICE WITH RECRUITED ROUTE CODE, A SUPPLEMENTARY SUBSCRIPTION SERVICE UNDERSTANDS THE INTERACTION BETWEEN TWO MEMBERS. KNOWLEDGE OF A SUBSCRIBER ACCESS CODE IS REQUIRED, USED IN THE REMOTE LOCAL CALLED REMOTE EXCHANGE, AT THE LOCAL CALLING MEMBER EXCHANGE. A SUBSCRIBER ACCESS CODE IS GENERATED BY MODIFICATION OF A CALLED SUBSCRIBER CODE USED BY THE LOCAL CALLED APPLICANT EXCHANGE EXCHANGE. SUCH MODIFICATION HAS A PLACE IN A TRANSIT NODE OF THE CITED NETWORK SERVICE. THEN IS SOLVED THROUGH THE INTERROVED PROBLEM BY PROVIDING A CCBS REPEATER APPLICATION SERVICE ELEMENT (CCBS-ASE) IN A GVNS TRANSIT NODE AND AVAILING FOR AN EXTREME SIGNALING TO EXTREME YOUR REPLACEMENT BY TWO DIALOGUES. CALLER AND THE CCBS-ASE REPEATER AND THE OTHER BETWEEN THE LE OF THE CALLED PART AND THE CCBS-ASE REPEATER.