链路状态信令单元(LSSU)——将链路状态信息传输到某个相邻的信令点。
Link status signal Units (LSSU) - transport link status information to an adjacent signaling point.
这些功能在网络中的每个信令点处得到执行并要确保将某点发出的用户部分消息送达到终点的同一个用户部分。
These functions are performed at each signaling point in the network and ensure that the user part messages originating at one point are delivered to the same user part at the destination point.
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.
所有ss7节点都通过信令链路进行互连，这些信令链路可以在节点间传输消息。
All SS7 nodes are interconnected via signaling links that transfer messages between the nodes.
低信令传送点LSTP ？
高级信令传送点HSTP ？
高级信令传送点HSTP ？
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