Patent ID: 8280422

Claim:
A communications device for inter-system communications the communications device comprising: a private mobile radio PMR communications unit for PMR communications with a PMR system element, a public land mobile network PLMN communications unit for PLMN communications with a PLMN system element, and a converter for performing conversion between PMR communications and PLMN communications, wherein the converter is arranged to perform, for an information unit requiring inter-system transfer, a conversion between a format used for PMR communications and a format used for PLMN communications, wherein the communications device is arranged to buffer the converted information unit or the information unit requiring inter-system transfer, the communications device is arranged to request establishment of a communications session or an authorization for data transfer to a target system part, the communications device is arranged to transmit the converted information unit via the target system part as a response to receiving an authorization to transfer, the communications device is arranged to function as a member of a communications group and the communications device is arranged to prioritize the communications device over other group members of the communications group.