Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2048 kbit/s-based plesiochronous or Synchronous Digital Hierarchy.
用2048 kbit/s备系列数接口物理和电气特性──基准同步和同步数体系。
Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2048 kbit/s-based plesiochronous or Synchronous Digital Hierarchy.
用2048 kbit/s备系列数接口物理和电气特性──基准同步和同步数体系。
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