... ++, VB, DELPHI, PB, C++ Builder,. NET, WEB GXUSB-1T recording box for agentFeatures and Benefits: With USB interface, easy to install, plug ... pickup after dial-up. Recording, playback, land code, tone detection of each channel are available at the same time. Unique DSP ... any frequency can be accurately identified. Offers a large selection of audio encoding, including the A-LAW PCM, ADPCM, GSM and ...