摘要: Broadband Integrated Services Digital Network (BISDN) is conceived as a universal digital network providing both integrated switching and services. Typical services include data, voice, video, high-resolution image, etc. [Spea 87]. Encouraged by developments of fast packet switches [Turn 85] ATD experiments in France [Deva 88], packet-oriented virtual circuit transfer mode, called ATM (Asynchronous Transfer Mode), has been adopted the transport vehicle BISDN [Minz 89]. Data from various sources are segmented into fixed-size cells statistically multiplexed to high-speed transmission lines switches. An consists 5-octet header 48-octet payload fields. Unlike conventional STM (Synchronous Mode) technique which data according positions recurrent structure (frame), switched labels containing routing information headers. Label-based believed be flexible integrating diverse traffic types, envisioned for environments.