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protected circuit ■ 4 systems in 1 booster [CDMA, TDMA, GSM 850, Analog in CDMA model.], PCS bypass [option] APM CO., LTD 22F-6, No.180, Jingping Rd., Jhonghe City, Taipei County 23581, Taiwan, R.O.C. Tel: +886 2 89431966 Fax: +886 2 89434944 APM Specifications ELECTRICAL PART Model No. CI 20 CC 20 CG 20 CP 20 Cell Phone System iDEN CDMA GSM PCS Frequency Uplink 806-824 MHz 824-849 MHz 890-915 MHz 1850-1910 MHz Range Downlink 851-869 MHz 869-894 MHz 935-960 MHz 1930-1990 MHz Bandwi