Extreme Networks 40GB-LR4-QSFP Compatible 40GBASE-LR4 QSFP+ Module

Extreme
QSFP+
40G
Duplex
10 km
Extreme Networks Compatible 40GB-LR4-QSFP QSFP Module

Extreme compatible 40GB-LR4-QSFP - Key Features

  • Compatibility: Extreme
  • Media Type: Single-Mode Fiber (SMF)
  • Connector: Double LC/UPC
  • Fiber Count: Duplex
  • Maximum Distance: 10 km
  • Average Link Budget: 6.6 dB
  • Tx Wavelength: CWDM 4 Ch
  • Supported Data Rate: 44.8 Gbps
  • DDM/DOM: Supported
  • Temperature Range: Standard 0°-70°C

Extreme 40GB-LR4-QSFP Price

Lead timeIn Stock - Ships Next Business Day
Standard recommended retail price ex VAT:
85.14
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Telecoms & Integrators Globally

Extreme compatible 40GB-LR4-QSFP Specifications

Form Factor
QSFP+
Modulation
NRZ (Non-Return to Zero)
Media Type
Single-Mode Fiber (SMF)
Connector
Double LC/UPC
Fiber Count
Duplex
Maximum Distance
10 km
Average Link Budget
6.6 dB
TX Wavelength
4-channel CWDM (1271/1291/1311/1331 nm)
RX Wavelength
4-channel CWDM (1271/1291/1311/1331 nm)
Supported Data Rate
44.8 Gbps
Supported Ethernet Applications
40G Ethernet (41.25Gbps)
Optical Transport Network (OTN) Applications
OTU3 (43.01Gbps), OTU3e2 (44.58Gbps)
SDH/SONET Standards
STM-256 (39.81 Gbps)
DDM/DOM
Supported
Transmitter Type
DFB Laser
Tx Wave Bandwidth
4 WDM Seperated 1310nm Lanes (13 nm (1271, 1291, 1311, 1331))
Average Launch Power (Min) Each Lane
-6 dBm
Average Launch Power (Max) Each Lane
3 dBm
Receiver Type
PIN photodiode
Average Receiver Sensitivity (Min) Each Lane
-12.6 dBm
Average Receiver Sensitivity (Max) Each Lane
3 dBm
Receiver Overload
3 dBm
Temperature Range
Standard 0°-70°C
Storage Temperature
-40° to 85°C
Relative Humidity
5 to 85%
Power
+3.3V single power supply
Compliance
IEEE 802.3ba, CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, INF-8438i, QSFP+ MSA, RoHS, SFF-8436

Extreme compatible 40GB-LR4-QSFP Datasheet

v2

Complete technical specifications and product details

Updated:Jan 16, 2026Format:PDF

Extreme compatible 40GB-LR4-QSFP Description

EdgeOptic's 40GB-LR4-QSFP compatible is an Extreme Networks-coded version of the EdgeOptic 40G-QSFP-10 multi-vendor 40GBASE-LR4 transceiver. It delivers 40Gb/s Ethernet over 10 km of single-mode fiber using four CWDM lanes at 1271, 1291, 1311 and 1331 nm on a duplex LC connector. An Extreme Networks-recognized EEPROM lets ExtremeXOS and SwitchEngine ports detect and enable the module.

The optic transmits with a DFB laser at −6 to +3 dBm per lane and receives on a PIN photodiode rated to −12.6 dBm sensitivity with a +3 dBm overload limit, for a 6.6 dB link budget across the CWDM grid. NRZ modulation carries the 41.25 Gbps 40GbE line rate (four lanes of 10.3125 Gbps). DOM telemetry reports temperature, supply voltage, laser bias, transmit power and receive power over the I2C interface. The module runs across the 0 to 70 °C commercial range.

Built to IEEE 802.3ba Clause 87, INF-8438i and the SFF-8436 QSFP+ MSA, the module matches the Extreme Networks 40GB-LR4-QSFP optical specification for Extreme campus and data center switching. Compatible with ExtremeXOS and SwitchEngine platforms; verify against your switch transceiver compatibility table before deployment.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Ships next business day from EU stock with a lifetime warranty. For platform qualification or bulk orders, contact our sales team.

Frequently Asked Questions

Does a 40GB-LR4-QSFP third-party optic need a license on ExtremeXOS or SwitchEngine?

Some ExtremeXOS releases require a third-party optics license for 40G ports, while later ExtremeXOS and SwitchEngine releases run third-party 40G optics without one. Verify the optics-licensing requirement for the ExtremeXOS or SwitchEngine version on your switch against the Extreme Networks optics compatibility documentation before deploying.