TELEPHONE LISTENING METHOD FOR INTERCEPTING NON-AUDIO DATA

摘要

The method involves transmitting non audio data e.g. short message service, from a mobile telephone (1) to a mobile telephone network and a fixed station (19), and from the fixed station towards the telephone. The non audio data is addressed to a recording station (2) by a conventional calling line, an asynchronous digital subscriber line and an integrated services digital network line if a calling terminal is under surveillance. An independent claim is also included for a station for implementing a wiretapping.