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邮电部已通过日本丸红公司从NEC公司引进先进的数字同步体系(SDH)微波通信系统,准备在广州—南宁的国家一级干线上使用,其话路容量为11340条,这套系统以采用
The Ministry of Posts and Telecommunications has introduced the advanced digital synchronous system (SDH) microwave communication system from NEC Corporation through Japan Marubeni Corporation to prepare for use on the national trunk line of Guangzhou-Nanning with 11,340 voice channels. The system adopts the