A paging system includes a private branch exchange telephone system having a number of registered users. The cache device caches data accessed by a processor connected to the cache device, manages the cached data on the basis of a memory block. The body-fat sensor further includes an impedance-measuring circuit having at least one pair of electrodes, where the pair of electrodes is being electrically coupled to both ends of the electrical conductor, so that the body-fat composition of the person can be measured based on the data received from the weight sensor and the impedance-measuring circuit. The microelectromechanical ink ejection devices are in fluid communication with the second passage. For an exceptionally regular and stable grid structure, it is proposed that the warp threads and weft threads lie one over the other in a separate thread plane in each case and extend in straight lines. Each of the cells is supported in the support member with an orientation extending transverse to the horizontal.