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江苏省电信器材一厂与湖南省邮电科学研究所联合试制的中容量准电子城市自动电话交换机,其容量为8000号线,由小规模,中规模CMOS集成电路及分立元器件构成系统逻辑电路,其中的用户记发器(YJF)是该交换机中的重要公用设备,设备量多,价格昂贵,实现微机化后不仅可以大幅度降低成本,取得好的经济效益,而且减小系统体积,提高可靠性和可维护性,还可以适应通信网中不同号长的要求,使系统显出更大的灵活性。
Jiangsu Province, a telecom equipment factory and Hunan Institute of Posts and Telecommunications joint trial of the volume of electronic city automatic telephone exchange, its capacity of 8000 lines, the small-scale, medium-scale CMOS integrated circuits and discrete components form the system logic circuit, The User Recorder (YJF) is an important public equipment in the switch. It has a large amount of equipment and is expensive. After computerized, it not only can greatly reduce the cost and achieve good economic benefits, but also reduce the size and reliability of the system. Sexual and maintainability, but also adapt to the different number of communication network requirements, the system showed greater flexibility.