HLR是移动通信网中非常重要的一个功能实体，它与网络中其它功能实体一起完成移动信令的交换。
HLR is a very important functional entity of the mobile communication network, exchanging diversified signal with other functional entities in the network.
介绍电信支撑网信令网集中监测维护系统的结构、工作原理以及主要功能。
The structure, operation principles and major function of concentrated supervision and maintenance system for signaling network of telecom support net-work are presented.
IP电话网关主要功能为连接传统电话网与IP网络，完成多路呼叫的信令协议和语音格式的转换。
The main function of gateways is to connect IP network and traditional phone system, and provide multi-call signaling exchanging and the conversion of voice formats.
IP电话网关主要功能为连接传统电话网与IP网络，完成多路呼叫的信令协议和语音格式的转换。
The main function of gateways is to connect IP network and traditional phone system, and provide multi-call signaling exchanging and the conversion of voice formats.
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