针对对讲机的VOIP中继网关设计  

Design of VOIP Relay Gateway for Interphone

作　　者：常海滨[1] 王帑[2,3] 

机构地区：[1]陕西学前师范学院实验室与设备管理处 [2]长安大学机械电子工程系 [3]西安理工大学

出　　处：《微型电脑应用》2016年第8期40-42,共3页Microcomputer Applications

基　　金：陕西学前师范学院科研基金项目(2015ZDKY020)

摘　　要：针对当前对讲机在特定领域中发挥的重要作用,并考虑到传统中继台在转发对讲机语音信号上的缺陷,参考当前流行的VOIP技术,设计了一种搭建简单,但功能齐全的针对对讲机的中继网关设计。利用两台对讲机进行中继台的双频收发,利用嵌入式技术和互联网技术实现将中继台的信号通过网络进行远距离转发。大大增加了对讲机语音信号的中继距离。用了互联网中SIP和RTP协议完成会话的建立删除,利用微处理器来控制中继台接口。经过试验证明,设计大大简化了中继台搭建的复杂程度,并且有效的扩大了中继台的中继范围。具有很强的创新性和实用价值。Considering the need of interphone in many particular area and the shortage of the traditional relay when relaying the sig- nal from each interphone, a design of relay gateway that is easy to be built and fully functional is described in this article. Two inter- phones are used to build the relay with each of them working on a different frequency. With the help of the technology of embedded system and internet, this machine can expend the distance that the traditional relay spread the signal greatly. In this article, the protocol of SIP and RTP in the Internet is used to establish and cancel the conversation and transmitted the voice signal. A MCU is used to help control the interface of the relay. After testing the machine, it is found that this design reduces the complexity of traditional relay and expends the area that the relay covers. This design is very creative and useful in daily life.

关 键 词：对讲机 中继台 语音网关 VOIP 嵌入式 

分 类 号：TN916[电子电信—通信与信息系统]