ETSI EN 300 462-4-2-1999
传输和复用(TM) 同步网络的一般要求 第4-2部分:适用于同步数字体系 (SDH) 和准同步数字体系
Transmission and Multiplexing (TM); Generic requirements for synchronization networks; Part 4-2: Timing characteristics of slave clocks suitable for synchronization supply to Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH...