100G-ER4LT-QSFP40KM Extreme Compatible 100G QSFP28 40KM Transceiver
Extreme compatible 100G-ER4LT-QSFP40KM - Key Features
- Compatibility: Extreme
- Media Type: Single-Mode Fiber (SMF)
- Connector: Double LC/UPC
- Fiber Count: Duplex
- Maximum Distance: 40 km
- Guaranteed Link Budget: 22 dB
- Tx Wavelenght: 1310 nm
- Supported Data Rate: 112 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): Host FEC Supported
- Temperature Range: Standard 0°-70°C
Extreme 100G-ER4LT-QSFP40KM Price
SKU:100G-QSFP28-40-EX
In Stock - Ships Next Business DayExtreme compatible 100G-ER4LT-QSFP40KM Specifications
Form Factor | QSFP28 |
Modulation | NRZ (Non-Return to Zero) |
Media Type | Single-Mode Fiber (SMF) |
Connector | Double LC/UPC |
Fiber Count | Duplex |
Maximum Distance | 40 km |
Guaranteed Link Budget | 22 dB |
TX Wavelenght | 4-channel LAN WDM (1295.56/1300.05/1304.58/1309.14 nm) |
RX Wavelenght | 4-channel LAN WDM (1295.56/1300.05/1304.58/1309.14 nm) |
Supported Data Rate | 112 Gbps |
Supportet Ethernet Applications | 100G Ethernet (103.125 Gbps) |
Supported Fiber Channel Applications | 4x 32G Fiber Channel (112.2Gbps) |
Optical Transport Network (OTN) Applications | OTU4 (112 Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | Host FEC Supported |
Transmitter Type | EML Laser |
Tx Wave Bandwidth | 4 LAN WDM Seperated 1310 nm Lanes (15.66 nm 1294.53 – 1310.19nm) (L0 Tx center 1295.56nm, L1 Tx center 1300.05nm, L2 Tx center 1304.58nm, L3 Tx center 1309.14nm) |
Average Launch Power (Min) Each Lane | -2 dBm |
Average Launch Power (Max) Each Lane | 4 dBm |
Extinction Ratio (Min) | 4 dB |
Receiver Type | APD Photodiode |
RX Wave Bandwidth | 4 LAN WDM Seperated 1310 nm Lanes (15.66 nm 1294.53 – 1310.19nm) (L0 Tx center 1295.56nm, L1 Tx center 1300.05nm, L2 Tx center 1304.58nm, L3 Tx center 1309.14nm) |
Average Receiver Sensitivity (Min) Each Lane | -21 dBm |
Average Receiver Sensitivity (Max) Each Lane | -18 dBm |
Receiver Overload | -1 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 4.5 W |
Power | +3.3V single power supply |
Compliance | CE, RoHS, Class 1 FDA and IEC60825-1 Laser Safety Compliant, IEEE 802.3ba, IEEE 802.3bm, 100GBASE-ER4 Lite, 128GFC Gen 6, OTN OTU4, QSFP28 MSA, SFF-8636 (Management Interface for 4-lane modules), SFF-8665 |
Extreme compatible 100G-ER4LT-QSFP40KM Datasheet
v2Complete technical specifications and product details
Extreme compatible 100G-ER4LT-QSFP40KM Description
100G-ER4LT-QSFP40KM is the Extreme Networks part number for a 100GBASE-ER4 Lite QSFP28 transceiver. The "LT" suffix indicates extended temperature support. This EDGE compatible module matches the original Extreme specifications with EEPROM coded for ExtremeXOS recognition. It operates over duplex single-mode fiber at four LAN-WDM wavelengths (1295.56, 1300.05, 1304.58, and 1309.14 nm), reaching up to 40 km with host FEC or 30 km without FEC.
The module uses EML transmitters and APD (Avalanche Photodiode) receivers, carrying four lanes at 25.78125 Gbps each for an aggregate 103.125 Gbps line rate. DDM/DOM provides real-time readings of TX/RX optical power, laser bias current, temperature, and supply voltage. Maximum power consumption is 4.5 W from a single 3.3 V supply.
The 100G-ER4LT-QSFP40KM works in ExtremeSwitching X870 (32-port QSFP28), X690 (QSFP28 uplinks), and 5520 platforms. Extreme does not hard-block third-party optics, but a 3rd Party Optics Feature license may be required on some platforms to recognize non-Extreme modules. Our compatible module is coded for ExtremeXOS recognition.
Extreme also offers the 100G-4WDM-QSFP40KM for the same 40 km reach. Both are ER4 Lite QSFP28 modules. The ER4LT variant adds extended temperature support. The equivalent module from other vendors is Cisco QSFP-100G-ER4L-S, Juniper QSFP-100G-ER4L, or Arista QSFP-100G-ERL4. All are interoperable on the same fiber link.
Our compatible 100G-ER4LT-QSFP40KM is CE and RoHS certified, QSFP28 MSA-compliant, and conforms to the 100GBASE-ER4 Lite specification. Before delivery, every module undergoes optical parameter measurement, connector cleanliness inspection, and EEPROM data validation testing.
For volume pricing, lead times, or technical questions about the 100G-ER4LT-QSFP40KM, contact our sales team. We can help match the right module to your Extreme Networks deployment.
Frequently Asked Questions
Which Extreme switches support the 100G-ER4LT-QSFP40KM?
The 100G-ER4LT-QSFP40KM is supported on ExtremeSwitching X870 (32 QSFP28 ports), X690 (QSFP28 uplinks), and 5520 series. Verify compatibility at optics.extremenetworks.com for your specific model and ExtremeXOS version.
What does the LT suffix mean on 100G-ER4LT-QSFP40KM?
The LT stands for extended temperature support. This module is rated for a wider operating temperature range than the standard commercial variant, making it suitable for environments with less controlled cooling.
Do I need a license for third-party optics on Extreme switches?
Some Extreme platforms require a 3rd Party Optics Feature license to recognize non-Extreme modules. Check your ExtremeXOS version and platform documentation. Our module is coded with Extreme-compatible EEPROM values.
Does the 100G-ER4LT-QSFP40KM require FEC for 40 km?
Yes. Without host FEC, the module reaches approximately 30 km. With FEC enabled, reach extends to 40 km. Configure FEC at the interface level and ensure the remote end matches.