The company is a Chinese state-owned Beijing cable plant, the Beijing Comprehensive Investment Company, the Beijing Municipal Tele Authority and the German company Siemens joint venture company, is Chinas largest Siemens in a joint venture, with total assets of 3.14647 billion yuan. Its The main products for the EWSD digital switching system and programmed PCM equipment. For the enterprise issued by the Beijing Municipal Economic Commission, 1992,1992 and 1994 Beijing industrial systems top 10 foreign-invested enterprises; Ministry of Industry 1992, 1993 and 1994 top 100 electronic enterprises; the National Bureau of Statistics 1993 industry profits of the top ten companies in 1994, Chinas industrial enterprises and tele equipment manufacturing industry, such as the first two glorious Show more title, in 1996 Chinas top 100 electronic enterprises section 33 the company has passed ISO9001 certification. electronic system on the economies of scale industrial enterprises. products throughout the country 29 provinces, municipalities, nomous regions, and there are 10 offices and numerous office.