A New Method of GSM Systems Jamming Based on Connection Quality Impairment

This paper presents a new method for jamming of GSM communications. The aim is to decrease voice connection quality, thus disabling users to understand each other, while keeping established connections. The jamming method parameters depend on the algorithm characteristics implemented in SACCH frame. It is proved for two mobile telephony codecs that it is possible to reach unsatisfactory voice connection quality MOS<;2 in a realized connection. The method performances are compared to other solutions.