The PolyPhaser PDWDM-RMMDM-20120 is a DWDM Passive Filter with 20 DWDM Channels. The PolyPhaser PDWDM-RMMDM-20120 is a 1RU 19" Rack Mount filter with Combo Mux/DeMux functionality. The PolyPhaser PDWDM-RMMDM-20120 has 20 DWDM channels: ITU CH20-39 starting with Channel 20 (1561.42nm) and with 100GHz channel spacing. The PolyPhaser PDWDM-RMMDM-20120 has LC/UPC connectors and has Monitor port option on Mux and Demux. The PolyPhaser PDWDM-RMMDM-20120 is a dual fiber filter with one sending muxed signal and the other receiving a composit signal for demuxing. PolyPhaser produces the high quality passive filters that your business can rely on. With products continually in stock and same-day shipping, our expert technical support and knowledgeable sales team can get you to the right parts for the job.