Enterasys 40GB-SR4-QSFP Compatible 40GBase-SR4 QSFP+ Optical Transceiver Module (MMF, 850nm, 150m, MTP/MPO, DOM)

Enterasys 40GB-LR4-QSFP Compatible 40GBASE-LR4 QSFP+ Optical Transceiver Module (SMF, 1310nm, 10km, LC, DOM)