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北京东单市话局是目前我国容量最大、功能性较强的一个市内电话局,建筑面积为二万四千二百平方米,分为主机楼、地下室、营业大厅、附属楼等五个部分。工程已于今年一月破土兴建。建成后,终期容量装纵横自动电话交换机四万门,初装一万门。这不仅增加了首都市内电话的通信能力,而且对全国长途电话自动化建设
Beijing Dongdan Municipal Bureau of Information is currently a city’s largest and most functional telephone exchange in the city. It has a building area of 24,200 square meters and is divided into five parts: host building, basement, business hall, and annex building. The project was groundbreaking in January this year. After completion, the capacity of the final phase installed 40,000 vertical and horizontal automatic telephone exchanges, with 10,000 doors installed. This not only increases the communication capacity of the telephone in the capital of the capital, but also the national long-distance telephone automated construction.