... . Jamming signals: GSM, AMPS, HCMTS , CDMA , TDMA ,TACS , PCS Jet-990 Mobile Phone Intercept SystemThe ... Jet-990 is a tactical 'off air' GSM, AMPS, HCMTS , ... CDMA , TDMA ,TACS , PCS , Mobile phone Intercept system, designed ... 860-960MHz 1,800-1,990MHz 2. Jamming signals: GSM, AMPS, HCMTS , CDMA , TDMA ,TACS , PCS ...