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本文简要地介绍了在通信网中起重要作用的数字交叉连接系统(DXC)从PDH—DXC发展到SDH—DXC以至ATM—DXC的演变过程。
This article gives a brief overview of the evolution of the digital cross-connect system (DXC) that has played an important role in communications networks from PDH-DXC to SDH-DXC and to ATM-DXC.