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传统的电力通信网是一种“刚性”网络，主要实现单一化、窄带化的通信业务，如果要承载其他性质的业务，则必须对其结构进行大调整，重新配置系统内各要素，这样一来，改造网络的工作量和经费投入与构造一个新的通信电路往往不相上下。“刚性”网的大量通信电路只适合少数几个
Traditional power communication network is a “rigid” network, mainly to achieve a single, narrow-band communications services, if you want to carry other properties of the business, you must make a major restructuring of its structure to re-configure the various elements of the system, so that It is often the same amount of work and funding to rebuild a network to construct a new communications circuit. A large number of communication circuits for “rigid” networks are suitable only for a few