Patent ID: 6961576
Filing Date: 2005-11-01
Classification: H04W

Abstract:
1. A method for establishing a communication link between a mobile communication terminal of a mobile radio network and a partner communication terminal of a communication network operating in accordance with an Internet Protocol, the mobile communication terminal being associated with a directory number of the mobile radio network and the partner communication terminal being associated with an IP address of the communication network, comprising: sending a text message, via the mobile communication terminal, including the Internet Protocol address, which is received by a service node connected to the mobile radio network; and sending a task message, via the service node, including the directory number and the Internet Protocol address to the communication network, such that the communication network establishes the communication link between the mobile communication terminal and the partner communication terminal, wherein the communication network establishes the communication link by: finding a gatekeeper, using the service node, of the communication network on the basis of the Internet Protocol address, and sending the task message, via the service node, to the gatekeeper, such that the gatekeeper is ordered to find the partner communication terminal associated with the IP address, and find a media gateway connecting the mobile radio network and the communication network, and causes the media gateway to establish the communication link.