(The first chapter introduces the purpose and content of this manual. The second chapter "Overview" introduces the performance characteristics and appearance of Dongjin D series analog telephone voice card? Chapter three? This paper introduces the installation and configuration of Dongjin D series analog telephone voice card? Chapter 4? "C language interface", which describes the use of each function in detail. Chapter 5:?? Conference resource function of Dongjin D series analog telephone voice card, detailed description of the function and implementation Chapter 6:?? Chapter 7 "TTS functions"?? Fax resource functions Chapter 8:?? Operating instructions of recording module m2r Chapter 9?? Description of example program Chapter 10?? Using various programming languages for development and example programs Chapter 11?? Tool software instructions Chapter 12?? PCI bus and h.100 basics Chapter 13?? Basic knowledge of telecommunications Chapter 14?? About LAN monitoring)