Enterasys速 40GB-LR4-QSFP compatible 40GBase-LR QSFP+ transceiver (SMF, 1270nm to 1330nm, 10km, LC). A 100% Enterasys速 compatible QSFP+ transceiver that operates at 1270nm, 1290nm, 1310nm, 1330nm over single-mode fiber, with a maximum reach of 10km...