Patent ID: 7096014

Claim:
A method of arranging roaming in a telecommunications system comprising at least one wireless local network, at least one public land mobile network, and at least one wireless terminal equipment comprising means for setting up a data transmission connection at least with the local network, the method comprising: determining, in the telecommunications system, public land mobile network identifiers and network element identifiers linked with said public land mobile network identifiers, transmitting said public land mobile network identifiers and the network element identifiers linked therewith to the terminal equipment, selecting a public land mobile network by means of a comparison of said received public land mobile network identifiers and public land mobile network identifiers contained in the terminal equipment, and providing the terminal equipment with access via the local network to the network element determined by the network element identifier linked with the identifier of the selected public land mobile network, wherein data transmission between the local network and the public land mobile network is based on the Internet Protocol (IP), and data between the terminal equipment and the network element of the selected public land mobile network is transmitted by means of messages whose network access identifiers (NAI) comprise the domain name of the authentication server of the selected public land mobile network as a realm section.