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四、ATM新技术1．关于传送模式的标准化──STM对ATM在宽带通信中，为了迅速发展新业务，要求实现灵活有效的用户接口，可变带宽的信息速率，还需要传输和交换能将全部业务实际综合，并迅速支持新业务等，对网路的要求很高。究竟采用STM（同步传送模式）好呢？还是采用ATM（异
Fourth, ATM new technology About Standardization of Transmission Modes-STM to ATM In order to rapidly develop new services in the field of broadband communication, a flexible and efficient user interface and a variable bandwidth information rate are required. Transmission and switching are required to actually integrate all the services and rapidly Support for new business, high demand on the Internet. What is the use of STM (synchronous transfer mode) is good? Or using ATM (different