It describes physical layer information flows according to the B-ISDN Protocol reference model and identifies interface functions.
它根据B- ISDN协议参考模型描述了物理层信息流并确定了接口功能。
It describes physical layer information flows according to the B-ISDN Protocol reference model and identifies interface functions.
它根据B- ISDN协议参考模型描述了物理层信息流并确定了接口功能。
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