Unwanted telephone call switching preventing method for use in e.g. switching based telephone network, involves performing test for detection of telephone mannerism of calling telephone subscriber before switching of telephone call

摘要

The method involves providing a filter (3), where a test is performed for detection of a telephone mannerism of a calling telephone subscriber (1) before switching of a telephone call to a called telephone subscriber (2). The filter evaluates signal power or other characteristics of audio signals in a communication channel for monitoring a conversation activity, and a speech recognition is performed by the filter.