MUX/DEMUX 1/4, 1/8 CWDM multiplexers/demultiplexers MUX/DEMUX 1/4: 4 outputs/channels, insertion loss/attenuation ≤ 1.3 MUX/DEMUX 1/8: 8 outputs/channels, insertion loss/attenuation ≤ 1.8 channel width λC ± 6.5