文章详细介绍了七号信令方式的结构、信令点、以及如何在HARRIS交换机数据库中修改七号信令中的目的信令点编码（DPC）。
In order to solve this, problem a common channel signalling No. 7 system appears. The paper introduces how to modify DPC in HARRIS Switcher′s database in detail.
每个点编码都是由信令路由和子系统号组成的。
Each point code consists of signaling routes and subsystem Numbers.
每个点编码都是由信令路由和子系统号组成的。
Each point code consists of signaling routes and subsystem Numbers.
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