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△ＡＴＭ技术的应用———Ｂ－ＩＳＤＮ业务谭淑贞１宽带业务宽带业务是相对于窄带业务而言的，一般来说，对于速率低于２Ｍｂ／ｓ的通信业务统称窄带业务，如电话网、Ｎ－ＩＳＤＮ所提供的业务。对于高于２Ｍｂ／ｓ的通信业务，如帧中继业务、交换型多Ｍｂ／ｓ数据业务（...
△ Application of ATM technology --- B-ISDN service Tan Shuzhen 1 Broadband service Broadband service is relative to narrowband service. Generally speaking, narrowband services such as telephone network, N -ISDN provided by the business. For more than 2Mb / s communication services, such as frame relay services, switching multi-Mb / s data services (...