Patent ID: 7369844

Claim:
A packet-based telecommunication network call control and signalling method for intercepting an incoming call destined for a user registered at an access node of the network, the network having an architecture of interworking nodes and further comprising a service node, an application node, and optionally a plurality of further access nodes and a gateway to an external telecommunication network, said method comprising: receiving, in the service node, a first call control signal comprising called user data; determining whether an intercept service is active or not active for the access node at which the user is registered; if the call intercept service is active: determining an access node alias of the access node; transferring the access node alias and called user data to the application node; determining, by the application node, a predefined divert-to identifier applicable to the access node alias; transferring to the service node the divert-to identifier and called user data including a service node command to continue routing the call on basis of the divert-to identifier; and delivering the call to a node identified by the divert-to identifier; and if the call intercept service is not active: routing, by the service node, the call on basis of the called user data and the access node at which the user is registered.