I have finally found transceiver that can be use for this switch. I confirmed Finisar FTL4C1QE1C 40GBASE-LR4 QSFP+ Transceiver is compatible with Dell S4810.
Does anyone ever tried Finisar FTL4C1QL1L 40GBASE-LR4 QSFP+ Transceiver? Is this works with Dell S4810? I just bough the switch but I have problem finding QSFP Transceiver to for this device. Please advice...
Dell S4810 QSFP 40G Compability