Part number: 100G-ER4LT-QSFP40KM
The ER4-Lite QSPF28 module provides a 100 Gb optical Ethernet connection over SMF (single-mode fiber), at distances up to 40 km.
LAN-WDM optics transmit the 100 Gigabit Ethernet (100G) signal over duplex single-mode fibers multiplexing/demultiplexing four 25G wavelengths within the transceiver. Transmission over 30 km links does not require Forward Error Correction (FEC), while FEC enabled on the hosts at both ends of the link is required for up to 40 km links. The 100G QSFP28 ER4-lite optic interoperates with 100G ER4 CFP and CFP2 optics over up to 30 km links.
For a complete listing of hardware compatible with these modules, see the Extreme Optics Compatibility website.
Transmission distances are provided as a nominal guide only. To determine achievable distances, refer to the device's optical specifications and to the specific characteristics of your fiber installation.
The following table lists specifications for the 100 Gb ER4-Lite QSFP28 module.
| Form Factor | QSFP28 |
| Aggregate Data Rate | 103.1Gb/s (4 x 25.78125Gb/s) |
| Link Reach | 30km without FEC, 40km with RS-FEC on the host |
| Optical Interface | 4x25G LAN-WDM optical lanes (1295.6,1300.1,1304.6, 1309.1 nm) |
| Electrical Interface | 4x25G electrical lanes |
| Optical Receptacle | LC |
| Fiber Connection | Duplex Single Mode |
| Bail Color | Red |
| Operating temperature range | 0-70 °C (32 to 158 °F) |
| Power Dissipation | Max 5.0W |
| Digital Diagnostic Monitors | Yes |
| TX Output Power per lane | Min. 0.5dBm (OMA) / -2.5dBm (average) |
| TDP per lane | Max 2.0dBm (OMA) |
| RX Overload | Max -3.5dBm (average) |
| RX Sensitivity | -14.8dBm (OMA) for 30km links (no FEC) |
| RX Sensitivity | -18.5dBm (OMA) for 40km links (with FEC) |
| Stressed RX Sensitivity | -13.0dBm (OMA) for 30km links (no FEC) |
| Stressed RX Sensitivity | -16.0dBm (OMA) for 40km links (with FEC) |