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据美国专利快报报导,最近发明了一种适用于音频、视频和数据传输的综合业务通信传输和交换系统。该系统适用于电话系统的用户终端和中心交换站之间。用户终端和中心交换站之间用光纤来连接。该系统采用了先进的波分复用技术,用户终端与中心交换站之间的信号发送与接收只需一根光纤。窄带服务采用数字传输,终端有模-数和数-模变换器,复用和
According to a report from the U.S. Patent Express, an integrated service communications transmission and switching system suitable for audio, video and data transmission was recently invented. The system is suitable for use between the telephone system user terminal and the central exchange station. User terminals and the center exchange between the optical fiber to connect. The system uses advanced wavelength division multiplexing technology, the user terminal and the center of exchange between the signaling and receiving only one optical fiber. Narrowband services using digital transmission, the terminal module - digital and digital - analog converter, multiplexing and