... VC++, VB, DELPHI, PB, C++ Builder,. NET, WEB GXUSB-8-line telephone voice boxFeatures and Benefits: With USB interface, easy to ... ) GX02U-1U1T 2-channel agent box(1- internal line and 1-external line) GX08U-4T 4-channel telephone voice box GX08U-4RT ... ) GX08U-4U4T 8-channel agent box(4- internal line and 4-external line)Development Environment: Provides drivers in WIN2000/XP and LINUX operating ...