CENTRALIZED TELEPHONE CONTROL AND BLOCKAGE SYSTEM, GATEWAY AND METHOD OF CONTROLLING AND BLOCKING TELEPHONES

摘要

A centralized telephone control and blockage system which implements an anti-tampering system (anti-fraud blockage system) for Public Use Telephones (PUT) is described. The system comprises (i) an exchange of origin (20) to which multiple telephones are associated (10); (ii) an exchange of destination (11) to which multiple telephones are associated; and (iii) at least one gateway (30) associated to the exchange of origin (20) and/or to the exchange of destination (11); the gateway (30) receiving and allocating calls coming from the exchange of origin (20), the calls allocated having anti-tampering devices, the gateway (30) associating origin to destination through a voice path (16). A gateway (30) especially used in a telephone control and blockage system is also described, as well as a method of controlling and blocking telephones which may be used in the system and gateway according to the invention.