The invention relates to a data transmission arrangement between at least two apparatuses in a system in which part of the connection between different apparatuses is a wireless connection. The apparatuses communicate with method calls containing a service request. Service brokers direct the service request to a given server, which replies to the method call according to the required service by sending the information required for the service to the service broker which sends the information to the sender of the method call. The arrangement further comprises an adapter which is connected to wireless apparatuses and which adapts the protocol used in the wireless connection to the rest of the network. The adapter finds the server providing the requested service on behalf of the apparatus which sent the method call and operates in a wireless network.