Method for transmitting tariff data to a subscriber unit

PCT No. PCT/FI95/00031 Sec. 371 Date Jul. 22, 1996 Sec. 102(e) Date Jun. 22, 1996 PCT Filed Jan. 23, 1995 PCT Pub. No. WO95/20298 PCT Pub. Date Jul. 27, 1995The invention relates to a method for transmitting tariff data via radio-frequency signals to a chargeable subscriber unit (1) communicating with a telecommunication network (7). In order to charge the user of the subscriber unit as fairly as possible, a tariff frame corresponding to a lump sum is transmitted to the subscriber unit (1), charge-metering signals received from the telecommunication network (7) are counted, and when the monetary value corresponding to the number of the counted charge-metering signals exceeds a predetermined threshold value, a new tariff frame corresponding to a lump sum is transmitted to the subscriber unit (1). The invention also relates to a system where the method according to the invention can be applied.