Brocade Compatible 40G-QSFP-LM4 QSFP Module

# Key Highlights
  • Type: QSFP Universal
  • Compatibility: Brocade Compatible
  • Tx/Rx Wavelength: 1310 nm. / 1310 nm.
  • Media Type: SMF or MMF
  • Optical Budget: 4.5 dB (SMF) / 2.5 dB (MMF)
  • Max. Distance: 150m(OM4) / 2km
  • Data Rate: 39.81-44.8 Gbps
  • Temperature: Standard 0°-70°
# Pricing & Ordering
SKU: 40G-QSFP-2.1-BR


Standard recommended retail price without VAT.

Lead Time: Below 1 Week in EU Countries
# Quality Assurance

Because of our comprehensive Testing Program, we are confident on quality of our products. Such approach empower us to cover all our products with:

# Key Technical Data
Media Type:

Multi-Mode Fiber (MMF), Single-Mode Fiber (SMF)

TX Wavelength:

1310 nm.

Transceiver Type:


RX Wavelength:

1310 nm.

Minimum Optical Budget:

4.5 dB (SMF) / 2.5 dB (MMF)

Maximum Distance:

150m, 2km

Supported Data Rate:

39.81 – 44.8 Gbps

Supported Applications:

40G Ethernet (41.25Gbps), STM-256 (39.81 Gbps), OTU3 (43.01Gbps), OTU3e2 (44.58Gbps)



Temperature Range:

Standard 0°-70°C


Double LC

Tx Wavelength Bandwidth:

4 WDM Seperated 1310nm Lanes (13 nm (1271, 1291, 1311, 1331))

Rx Wavelength Bandwidth:

4 WDM Seperated 1310nm Lanes (13nm (1271, 1291, 1311, 1331))

Minimum Transmitting Power:

Each Lane SMF: -7 dBm / MMF: -7 dBm

Maximum Transmitting Power:

Each Lane SMF: 2.3 dBm / MMF: 2.3 dBm

Receiver Sensitivity:

Each Lane SMF: -11.5 dBm / MMF: -9.5 dBm

Receiver Overload:

Each Lane SMF: 2.3 dBm / MMF: 2.3 dBm

Transmitter Type:

DFB Laser

Receiver Type:

PIN photodiode




+3.3V single power supply


CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, INF-8438i, QSFP+ MSA, RoHS, SFF-8436

# Product Documentation
Multi-Vendor MSA Compatible 40G-QSFP-2.1 QSFP Datasheet

Brocade Compatible 40G-QSFP-LM4 QSFP Module is based on our product 40G-QSFP-2.1. When You will order it will be encoded to be compatible with Brocade equipment and it will be labeled with part number: 40G-QSFP-2.1-BR, where BR means Brocade Compatible. Above You can download datasheet of our 40G-QSFP-2.1 product.

# Product Description

    40G-QSFP-LM4 is Brocade Compatible QSFP (Quad Small Form-factor Pluggable) Transceiver, operating over pair of singlemode or multi-mode optical fiber with four independent optical communication lanes seperated from each other using WDM technology. Module has minimum guaranteed optical budget of 4.5 dB if used on SMF and 2.5 dB if used on MMF, which in most cases is enough to reach 2 km distance using single-mode cable and 150m distance using OM4 multi-mode cable, or 100m distance using OM3 multi-mode cable. However, distance is just indicative parameter calculated for comfort of identification. Eventually we calculate distance taking in account minimal optical budget and average attenuation of optical cabling in industry. 40G-QSFP-LM4 uses 4 x DFB transmitting lasers and 4 x PIN receivers, operating each lane with speeds of 11.2 Gbps, giving an aggregated maximum bandwidth of 44.8 Gbps. Module supports DDM/DOM optical diagnostics, which provide diagnostic information about the present operating conditions. 40G-QSFP-LM4 operates in Standard 0°-70°C temperature range and has double LC connector. QSFP+ support 39.81 – 44.8 Gbps data rate and such applications as 40G Ethernet (41.25 Gbps), STM256 (39.81 Gbps), OTU3 (43.108 Gbps) and OTU3e2 (44.58 Gbps). 40G-QSFP-LM4 optical transceiver is multi-purpose module used in number of different places of today’s networking. Consequently, most popular applications are Internet Service Provider (ISP) Fiber To The Home aggregation and backbone, Mobile operator core and back-haul 40G applications, Data Center networking site interconnections and other optical links.

    Transceiver is CE/RoHS certified and it is Compliant with product safety standards. We perform compatibility tests for Brocade compatible 40G-QSFP-LM4 QSFP+ Transceiver with latest platforms of Brocade networking equipment, which allows us to encode transceiver EEPROM memory to be compatible and work seamlessly with Brocade platforms. However, our optical transceivers are compliant compliant to QSFP Multi Source Agreement SFF-8436. as well. Because our focus is providing top quality service, we are performing serious quality checks before delivery of our products. As a result, we do optical parameter measurements, connector cleanness tests and QSFP transceiver EEPROM memory data validation tests.