SELECTIVE CALL BLOCKING OFFERED IN TRIAL SERVICE - USES CALLING PARTYNUMBER TO BLOCK NUISANCE CALLS

NTT receives many reports from customers who have received nuisance ca lls. As a promising weapon for combating this problem, a selective cal l blocking service called Malicious Call Rejection was introduced Dece mber 20, 1993 as a trial service. The service is being provided in a limited area for a set period, in order to determine its effectiveness and gauge the effects on the public. The results will then be reflect ed in the service when it is provided on a general basis. The service is described below, along with the background to its development.