摘要
Abstract
In order to satisfy the requirements for stable and reliable LS trunk communication of the vehicle-mounted dispatch switch in the emergency response communication system , a CPC5621 chip-based loop trunk circuit design solution is put forward . The typical application of this design in the vehicle-mounted dispatch switch is introduced . The functions of the CPC5621 chip are stated and the hardware structure of the system is provided . The methods for implementing the loop trunk circuit by using CPC5621 chip are described for different modules , the processing flows of voice and signaling are explained in detail , and the system soft-ware design is analysed . After testing and applications , the design of LS trunk on CPC5621 is proved to meet the stability and reli-ability requirements .关键词
应急通信系统/CPC5621芯片/环路中继/C8051F020/IDT82V1054Key words
the emergency response communication system/CPC5621/LS trunk communication/C8051F020/IDT82V1054分类
信息技术与安全科学
