Home / Standards / GB/T 20440-2006 GB/T 20440-2006 Active Technical requirements of Dense Wavelength Division Multiplexer/Demultiplexer 密集波分复用器/解复用器技术条件 Standard Type GBT ICS 33.180.20 CCS M33 Status 现行 Issue Date 2006-08-23 Implementation 2007-02-01 Responsible Dept 工业和信息化部(通信) Drafting Unit N/A