The Etern 40GBASE-SR4 QSFP+ transceiver support link lengths of 100 meters and 150 meters, respectively, on laser-optimized OM3, and OM4/OM5 multimode fibers. It primarily enables high-bandwidth 40G optical links over 12-fiber parallel fiber terminated with MPO/MTP multifiber female connectors. It can also be used in a 4x10G breakout mode for interoperability with 10GBASE-SR and SFP-10/25G-CSR-S (in 10G mode) interfaces up to 100 and 150 meters on OM3, and OM4/OM5 fibers, respectively.
The worry-free 4x10G mode operation is enabled by the optimization of the transmit and receive optical characteristics of the QSFP-40G-SR4 to prevent receiver overload or unnecessary triggering of alarm thresholds on the 10GBASE-SR and SFP-10/25G-CSR-S (in 10G mode) receiver, and at the same time is completely interoperable with all standard 40GBASE-SR4 interfaces.
The 4x10G connectivity is achieved using an external 12-fiber parallel to 2-fiber duplex breakout cable, which connects the 40GBASE-SR4 module to four 10GBASE-SR optical interfaces. QSFP-40G-SR4 is optimized to guarantee interoperability with any IEEE 40GBASE-SR4 and in 4x10G mode with the 10GBASE-SR and SFP-10/25G-CSR (in10G mode).
Product list
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| Part Number | Package | Data Rate | Wavelength | Reach | Transmitter | Receiver | TX output (dBm) |
RX Sensitivity (dBm) |
Power Consumption (W) |
Interface | Temperature | Application |
| FLS40C101S | QSFP+ | 40G | 850nm | 100M | VCSEL | PIN | 0.5~-7.5 | -9.9 | <1.5 | MPO | 0℃~70℃ | 40GBASE-SR4 |
| FLS40C103S | QSFP+ | 40G | 850nm | 300M | VCSEL | PIN | 1~-7.5 | -9.9 | <1.5 | MPO | 0℃~70℃ | 40GBASE-CSR4 |