... . 3. FCC,CE certificates Tansonic TX2006P112USB Telephone RecorderTansonic TX2006P112 USB Telephone Recorder is the two line recording system,It uses the ... of starting recordThe system has Pressure Control,Key Control,Sound Control and so on..Start time of recording can ... : 2200Hz±1%,Logic 1: 1200Hz±1% Calling Monitoring :Signal sound VoicePolarity reversal. DTMF code: 0~9*#ABCD Exchange function:256 ...