Patent ID: 9549076
Date: 2017-01-17
CPC Classifications: H04L,H04M

Claim:
1. A method for lawful interception during call forwarding in a packet-oriented telecommunication network in which switching functions are provided by servers and wherein calls associated with a subscriber with call forwarding are intended to be monitored by lawful interception, said method comprising: notifying a first switching function, which is responsible for a called subscriber with call forwarding, of monitoring of the calls associated with the subscriber with call forwarding; writing, by the first switching function, an identifier of the subscriber with call forwarding into a prescribed parameter of a switching protocol; signaling the call forwarding to a second switching function, which is responsible for a calling subscriber; identifying, and initiating, by a third switching function to which the call has been forwarded, the monitoring of the subscriber with call forwarding using the prescribed parameter of the switching protocol.