British Telecommunications Public Limited Company

James Douglas Pettifor

Alan J Clapton

In a telephone network, a service control point is called by a switching center, if a flag has previously been set by some event (e.g. call charges crossing a threshold or the leaving of a voice mail message) when a call is being established or terminated. The switching center then operates in accordance with commands returned by the service control point. If no flags have been set, the service control point is not called and the call is treated by the switching center in a default manner.

Intelligent network services

A mobile telephone system provides a subscribe with services, for instance call barring and call forwarding, in dependence on the circumstances of the subscriber's mobile station. For instance, if the mobile station has a first network as its home network, the services provided are modified if it is detected that the mobile station has registered with a second network. In particular, international calls may be barred when on the home network, but permitted when on the second network so that the user may call his home country. This is carried out by having a number of different service profiles stored in the home network, for controlling the interactions between the mobile telephone and the current network, these service profiles being selected according to which network the mobile telephone is currently working to.

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Suffolk, United Kingdom

James Douglas Pettifor