Method and apparatus for determining a telephone number for accessing a target entity

摘要

Service resource items ( 49 ) for use in call setup in a telephone system are held on servers ( 58 ) that are connected to a computer network which is logically distinct from the telephone system infrastructure; this computer network may, for example, make use of the Internet. Each service resource item ( 49 ) is locatable on the network at a corresponding URI and is associated with a particular telephone number. A mapping is provided between telephone numbers and the URIs of associated service resource items. When it is desired to access a service resource item ( 49 ) associated with a particular telephone number, this mapping is used to retrieve the corresponding URI (step 55 ) which is then used to access the desired service resource item ( 56, 57, 59 ).