• Silver-colored arista qsfp-40g-lrl4 40g qsfp+ transceiver modules with blue handles and metallic connectors for duplex smf
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Arista

Arista QSFP-40G-LRL4 | 40G QSFP+ Transceiver, LRL4, 1km, Duplex SMF, LC

Arista QSFP-40G-LRL4 | 40G QSFP+ Transceiver, LRL4, 1km, Duplex SMF, LC

QSFP-40G-LRL4

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Description

The Arista QSFP-40G-LRL4 is a 40GBASE-LRL4 QSFP+ optical transceiver delivering 40 Gigabit Ethernet connectivity over duplex single-mode fibre at distances up to 1km. Designed for data centre deployments, it leverages 4-lane CWDM multiplexing across wavelengths of 1270nm to 1330nm — allowing organisations to reuse existing duplex LC infrastructure rather than requiring parallel MPO cabling. Digital Optical Monitoring (DOM) provides real-time diagnostics via the I2C interface, enabling proactive network management.

Natively supported on all Arista QSFP+ switch ports without restriction, the module is also interoperable with IEEE 802.3ba 40GBASE-LR4 transceivers from third-party vendors. Hot-swappable and RoHS compliant, it draws a maximum of just 3.5W for energy-efficient operation. Get it now at iptrading.com.au — authentic hardware, reliable service.

Features

- 40GBASE-LRL4 design optimised for data centre and campus interconnects up to 1km
- Integrated 4-lane CWDM MUX/DEMUX enables 40G over duplex LC SMF — reuses existing 10G fibre infrastructure
- Digital Optical Monitoring (DOM) for real-time diagnostics: temperature, voltage, TX/RX power
- Hot-swappable and plug-and-play — no service interruption during installation or replacement
- Supported natively on all Arista QSFP+ switch ports without configuration restrictions
- Interoperable with IEEE 802.3ba 40GBASE-LR4 transceivers from other vendors
- Low-power design at maximum 3.5W — suitable for high-density port deployments
- Single +3.3V supply operation with LVCMOS/LVTTL control signals (Module Present, Reset, Interrupt, Low Power Mode)
- RoHS compliant for environmentally responsible deployments

Warranty

Arista hardware products come with a 1-year limited hardware warranty, covering defects in materials and workmanship under normal use.
Extended Warranty Options:
IP Trading offers tailored extended warranty solutions and support packages for Arista products. Contact our team to explore options that align with your organisation's needs.
https://www.arista.com/assets/data/pdf/Warranty.pdf

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- Form Factor: QSFP+
- Data Rate: 40 Gbps (40GBASE-LRL4)
- Maximum Reach: 1km over duplex Single-Mode Fibre (SMF)
- Connector: LC Duplex
- Wavelengths: 4 CWDM lanes, 1270nm–1330nm
- Max Power Consumption: 3.5W
- Supply Voltage: +3.3V single supply
- Operating Temperature: 0°C to 70°C
- Digital Optical Monitoring (DOM): Yes
- Compliance: QSFP+ MSA (SFF-8436), IEEE 802.3ba 40GBASE-LR4
- RoHS Compliant: Yes

FAQs

Q: What fibre type and cable infrastructure does the QSFP-40G-LRL4 require?
A: The QSFP-40G-LRL4 operates over duplex single-mode fibre (SMF) using standard LC duplex connectors — the same connector type used in most existing 10G SMF installations. This allows organisations to upgrade to 40G without replacing their fibre or patch panel infrastructure.

Q: What is the maximum transmission distance of this transceiver?
A: The QSFP-40G-LRL4 supports links up to 1km over duplex single-mode fibre, making it suitable for intra-campus and data centre interconnects where longer reach than multimode OM3/OM4 is required but a full 10km LR4 solution is unnecessary.

Q: Is this transceiver compatible with non-Arista switches?
A: Yes. The QSFP-40G-LRL4 complies with IEEE 802.3ba 40GBASE-LR4 and the QSFP+ MSA (SFF-8436), enabling interoperability with 40GBASE-LR4 transceivers and QSFP+ ports from third-party vendors. Within the Arista ecosystem, it is supported on all QSFP+ ports without restriction.

Q: Does the QSFP-40G-LRL4 support Digital Optical Monitoring?
A: Yes. The module includes full DOM (Digital Optical Monitoring) support, providing real-time visibility into operating parameters such as temperature, supply voltage, TX bias current, TX power, and RX power via the I2C interface — simplifying fault diagnosis and preventive maintenance.

Q: Can I purchase the Arista QSFP-40G-LRL4 in Australia through IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware reseller stocking authentic Arista transceivers including the QSFP-40G-LRL4. Contact the team for pricing, lead times, and volume enquiries.

Q: How does the 4-lane CWDM design benefit deployment?
A: The built-in CWDM multiplexer/demultiplexer combines four 10G lanes across four wavelengths (1270nm, 1290nm, 1310nm, 1330nm) onto a single duplex fibre pair. This eliminates the need for external MUX hardware and allows full 40G throughput over a standard duplex LC SMF connection.

Datasheet

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