Abstract: A cellular radio system, having a mobile services switching center (MSC) coupled to a base station by means of a pulse code modulation (PCM) link, has an apparatus comprising, in the MSC, a transcoder and rate adaptor (TRA) that generates a PCM frame from a plurality of user data blocks, each user data block corresponding to one of a plurality of users and each user data block comprising an integer number of bytes of data. In the PCM frame, each of the plurality of user data blocks occupies an integer number of consecutive bytes of the generated PCM frame, which is then output to the PCM link. The base station includes a channel encoder that generates an air interface frame from a plurality of user data blocks contained in a received PCM frame. The base station may also generate a timing control signal which is received by the MSC.

Abstract: Arming device for sea mines comprising an electric detonator, a transfer charge and an interruptor which can be inserted between the detonator and the transfer charge for separating the detonator and the transfer charge; the detonator is arranged as part of a separate unit which can be inserted into a space in a housing arranged in the arming device; cooperating electric contacts are arranged on the unit and in the space, respectively, for the electric connection of the detonator at the insertion thereof into the space.