System for charging the use of a packet based telecommunication network. A measuring device (2) measures the number (n) of data units during a period of time (T) or the period of time (t) between a certain number (N) of data units. At any rate, the period of time is short in relation to the total connection...http://www.google.com/patents/US7466657?utm_source=gb-gplus-sharePatent US7466657 - System for charging the use of a packet-based telecommunication network