Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2048 kbit/s-based plesiochronous or Synchronous Digital Hierarchy.
用于2048 kbit/s的设备列数接口的物理电气特性──基于准数体。
Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2048 kbit/s-based plesiochronous or Synchronous Digital Hierarchy.
用于2048 kbit/s的设备列数接口的物理电气特性──基于准数体。
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