L-com's PCW3C-CA327-NN34 is a CWDM passive filter with 16 channels with 20nm spacing. L-com's PCW3C-CA327-NN34 is 1 RU with Mux and Demux functionality. L-com's PCW3C-CA327-NN34 has 16 channels: 1271, 1291, 1311, 1331, 1351, 1371, 1431, 1451, 1471, 1491, 1511, 1531, 1551, 1571, 1591, and 1611nm (skipping 1391 and 1411nm), starting with 1271nm and with 20nm spacing with LC/APC and monitor. A monitor port used to analyze or test the power signal coming into or out of a multiplexer, either before it reaches the de-multiplexer (received signal) or as it exits the multiplexer (transmitted signal). L-com's PCW3C-CA327-NN34 is one of thousands of fiber optic products available in-stock and ready to ship today.