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200GDWDM module mux demux dwdm roadm for 5G, US $ 170 - 180 / Piece, Guangdong, China, DWDM System,PON Networks,CATV Links, Telcordia GR-1209-CORE-2001Telcordia GR-1221-CORE-2001.Source from Shenzhen ADTEK Technology Co., Ltd. on Waimaotong.com.