Method for transmitting tariff data to a subscriber unit

A radio system providing a wireless local loop, the radio system comprising:

• at least one base station;
• a chargeable subscriber unit connected to one of the at least one base station by radio frequency signals;
• a subscriber network element transmitting calls between the chargeable subscriber unit and a telecommunication system through the one of the at least one base station, the subscriber network element comprising:
• means for transmitting telecommunication signals between the telecommunication system and the chargeable subscriber unit;
• a counter arranged in connection with the subscriber network element to count charge-metering signals transmitted by the telecommunication system;
• and
• a memory device arranged in connection with the subscriber network element to indicate a tariff frame corresponding to a set of numbers dialed by the chargeable subscriber unit, the subscriber network element further comprising means, responsive to the counter, arranged to retrieve from the memory device the tariff frame to be transmitted to the chargeable subscriber unit when a connection is established and when a monetary value, corresponding to a number of the charge-metering signals counted by the counter exceeds a predetermined threshold value.