The invention relates to a technique for performing a random access procedure over a radio interface, for example between a mobile terminal and a radio base station of a mobile network. The curing temperature is between the powder coating cross-linking temperature and the melting point temperature of the articles. Since the voltage values of the DC component ) of the telephone signal more particularly in a private branch exchangemay be lower than specified, in response to which the off-hook device could determine a false outcome, the off-hook device activates an error mode when the off-hook detection information is produced simultaneously with the ringing signal detection. The second storage area has two memory divisions allocated to each ink, that is, a first ink remaining quantity memory division and a second ink remaining quantity memory division.