Abstract: A method, data transmission element and stand for enabling optical data transmission in a mobile station. A mobile station, which comprises means for transmitting and/or receiving data in optical format, is arranged in a stand which comprises a data transmission element. The data transmission element transmits the optical signals transmitted by the mobile station to the surrounding area of the stand and/or the optical signals intended for the mobile station from the surrounding area of the stand to the mobile station. The optical signal propagates through the data transmission element in optical format and can be infra-red light, visible light and/or ultra-violet light.

Abstract: A radio telephone handset including a housing for retaining an audio diaphragm means, the housing having an aperture therein for receiving the diaphragm means, the diaphragm co-operating with the housing to define a substantially sealed chamber, the arrangement being such that an inward face of the audio diaphragm means is enclosed by the substantially sealed chamber and is thereby substantially acoustically isolated from a outward face of the diaphragm.