| 摘要 |
A method for implementing a contactability service, in which method a contactability number is defined for the person to be contacted and at least two contactability chains are created, in each of which there is at least one response location. The contactability chains are connected to the contactability number in a call control system (3, 4) in such a way that calls made to the contactability number at each moment can be routed to the response locations in a manner defined by a single active contactability chain. In the invention, a data communications link is created between the call control system (3, 4) and the access surveillance system (1, 2) used by the person to be contacted, and at least two states of the access surveillance system (1, 2) concerning the person to be contacted are defined to indicate each contactability chain for the person to be contacted. If, after this, the call control system (3, 4) is set to receive, by means of the data communications link, data from the access surveillance system (1, 2) indicating the state of the access surveillance system (1, 2) to define the contactability chain, the contactability chain indicated by the data received at each time can be set in the call control system (3, 4) to be the active contactability chain.
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