0061704521; CH #D21 SFP, DWDM 1550.92nm, LR-2 SMF 80km, 29dB, 100M-2.7G DDM, Adva 0061704521; CH #D21 Compatible
0061704531; CH #D31 SFP, DWDM 1560.61nm, LR-2 SMF 80km, 29dB, 100M-2.7G DDM, Adva 0061704531; CH #D31 Compatible