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1N EC SM S-2500A设备简介SM S-2500A设备是NEC公司生产的2.5Gbit/sSDH设备,由高速框(H S)和中速框(M S)组成。高速框主要由2.5Gbit/s线路盘和ADX16交叉连接盘组成,完成线路信号传送和交叉连接工作;中速框由不同支路盘组成,主要完成上下电路工作。SM S-2500A的最小支路单元为15
1N EC SM S-2500A Device Description The SM S-2500A is a 2.5Gbit / s SDH device manufactured by NEC. It consists of a high-speed frame (Hs) and a medium speed frame (Ms). High-speed box mainly by the 2.5Gbit / s circuit board and ADX16 cross-connect disk to complete the line signal transmission and cross-connection work; medium-speed box composed of different branch disk, the main circuit to complete the work up and down. The SM S-2500A has a minimum branch unit of 15