USB Telephone Recorder 1,high-impedance recording 2, ... 4,FSK, DTMF code 8-channel Telephone RecorderTelephone recorder adopts parallel connection, allowing recording of analog telephone ... response and leaving message.9, Software dialing, playing voice prompt during recording on demand (MODEL: GXUSB-8R+ ... and leaving message.14, Supports 5-times compressed voice for storage, and audio data can be ...