改造日本C400交换机多频的一种成功方案

• 作 者: 蒋传纪
• 机 构: 通信工程学院电路基础教研室
• 出 处: 军事通信技术
• 发表日期: 1994年02期
• 关键词: C400 多频 换代产品 发码器 线路信令 中继方式 长途网 记发器 继电器线圈 互控

近几年国内一些省市从日本引进了大约40万线的二手纵横制交换机。由于是日本国内的换代产品,价格便宜。对我国一些经济还不发达的地区,以较少的投入,解决了部分电话增容的急需。该交换机以C400型号为主,主要分布在内蒙、山西、甘肃、云南、山东等边缘省区。但由于C400纵横制交换机是按日本国内制式设计的模拟多频,与我国制式的多

In recent years, some provinces and cities in China have imported about 400,000 lines of used crossbar switches from Japan. Because it is a replacement product in Japan, the price is cheap. Some of China’s economy is still underdeveloped areas, with less investment, to solve some of the urgent need for telephone capacity. The switch to C400 models based mainly in Inner Mongolia, Shanxi, Gansu, Yunnan, Shandong and other border provinces. However, because C400 crossbar switch is designed according to the Japanese domestic system analog multi-frequency, and our standard