... Bands: 860-960MHz 1,800-1,990MHz 2. Jamming signals: GSM, AMPS, HCMTS , CDMA , TDMA ,TACS , PCS Jet-990 Mobile Phone Intercept ... SystemThe Jet-990 is a tactical 'off air' GSM, AMPS ... plants, Industrials Plants Specification:1. Frequency Bands: 860-960MHz 1,800-1,990MHz 2. Jamming signals: GSM, AMPS, HCMTS , CDMA , TDMA ...