... judge channel status 4, FSK DTMF 8-channel Voice LoggerAdopts parallel connection, allowing recording of analog telephone, all kinds of audio, ... hot-swap, PNP(plug and play)and automatic recognition2, Parallel connection and high-impedance recording module, have no influence on two ... Supports automatic recovery after hot-swap and USB port error 12, Drivers is based on event-driven, providing DLL dynamic ...