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Amazon.com: OPSTRAN 40GBASE-SR4 QSFP+ Optical Transceiver Module Compatible for Cisco QSFP-40G-SR4 Meraki MA-QSFP-40G-SR 40G QSFP+ SR4 850nm 150m DDM MTP/MPO-12 MMF : Electronics
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Cisco QSFP-40G-SR-BD-CSC Compatible 40GBASE-SR4 QSFP+ BIDI 850nm/890nm 100m on OM3 / 150m on OM4 Transceiver Module for MMF Transceivers - HiFiber.com
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Amazon.com: 40G QSFP+ SR BiDi for Cisco QSFP-40G-SR-BD,Meraki MA-QSFP-40G-SR-BD, 40GBASE-SR Bi-Directional QSFP+LC Multi-Mode Transceiver Modul 850nm/900nm MMF 100m/150m Duplex LC : Electronics
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Cisco QSFP-40G-LR4 Comp. QSFP+ 40GbE DDM - SFP Modules | Networking IO Products | StarTech.com Europe
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