The invention relates to a device for monitoring the safety of a bending pole in a large manipulator, whereby the arms of the mast can be pivoted in relation to each other by means of a drive unit. A first service mechanism in the radio access network breaks out data coming from a basestation. The crossbar switch also includes a second number of output ports. The barrel is axially and rotationally moveable within the frame allowing for precise positioning of the optical wave-guide relative to the frame thereby minimizing polarization dependent loss. A photosensor that detects paper within the double-sided printing unit when the double-sided printing unit is mounted in the device main body detects the paper within the double-sided printing unit via an opening provided in an upper area of the double-sided printing unit. The communicated data value is reassembled at the target device from the data chunks in the target identifier of the interrupt transactions in the sequence.