A TELECOMMUNICATIONS SYSTEM

摘要

A telecommunications system (2) having a cellular mobile telephone system (6) in which calls from cellular telephones (20) are routed through a mobile service switching centre exchange (14, 30). Users of the system, having control of respective groups of mobile telephones (20) are able via user terminals (110) to access respective databases in a signalling processor (100) and to place in the data- base information about call parameters, such as call restrictions, for ones of the telephones of that users controlled group. When a call is made from any mobile telephone (20) the call signal is decoded at the relevant exchange (14, 30) and a determination made as to whether the call originates from a mobile telephone which is a member of a controlled group. If so, the related database in the controller (100) is accessed and the call is controlled in accordance with the appropriate call parameters, on the basis of the informa- tion in the related data base.