Cisco Compatible QSFP-40G-LR4 | 40GBASE-LR4 QSFP+ Transceiver LC SMF 10km

Cisco Compatible QSFP-40G-LR4 40GBASE-LR4 QSFP+ Optical Transceiver (LC Duplex, 1310nm, 10km)

Product Overview

The Cisco compatible QSFP-40G-LR4 optical transceiver is a high-performance 40Gbps module designed for long-range transmission over single-mode fiber (SMF). Utilizing WDM (Wavelength Division Multiplexing) technology, it multiplexes four optical lanes into a single fiber pair, enabling efficient high-speed data transmission.

Operating around the 1310nm wavelength range, this module supports distances up to 10 kilometers, making it ideal for data center interconnects (DCI), enterprise backbone networks, and telecom applications requiring reliable 40G connectivity over longer distances.

Key Features

Supports aggregate data rate of 40Gbps (4 × 10Gbps lanes)

LAN-WDM technology (4 wavelengths multiplexed)

Transmission distance up to 10km over SMF

LC Duplex connector

Fully compliant with QSFP+ MSA and IEEE 802.3ba 40GBASE-LR4

Hot-pluggable QSFP+ form factor

Built-in Digital Diagnostic Monitoring (DDM/DOM)

Low power consumption (<3.5W)

High reliability for long-distance transmission

100% compatible with Cisco platforms (custom coding available)

RoHS compliant and Class 1 laser safety certified

Technical Specifications

Parameter	Specification
Form Factor	QSFP+
Data Rate	40Gbps (4 × 10Gbps)
Wavelength	LAN-WDM (~1270–1330nm)
Fiber Type	Single-Mode Fiber (SMF)
Max Distance	10km
Connector	LC Duplex
Transmitter Type	DFB Laser (WDM)
Receiver Type	PIN Photodiode
Lane Configuration	4 Tx / 4 Rx
Output Power	-7 ~ +2.3 dBm
Receiver Sensitivity	≤ -11.5 dBm
Power Consumption	< 3.5W
Operating Temperature	0°C to 70°C (Commercial)
Storage Temperature	-40°C to 85°C
Protocols Supported	IEEE 802.3ba, QSFP+ MSA
Digital Diagnostics	Yes (DDM/DOM Supported)

Applications

40G Ethernet long-distance links

Data center interconnect (DCI)

Enterprise backbone networks

Metropolitan Area Networks (MAN)

Telecom aggregation and access networks

Switch-to-switch and router uplinks

Compatibility

This module is fully compatible with Cisco switches and routers and can be custom-coded for other major networking platforms such as Huawei, Juniper, HPE, Arista, and more.

Why Choose This QSFP-40G-LR4 Module?

Cost-effective alternative to original Cisco QSFP+ optics

Efficient WDM-based transmission over duplex fiber

Ideal for extending 40G networks up to 10km

Fully tested for compatibility and reliability

OEM/ODM support including labeling and coding customization

Stable supply for enterprise and telecom deployments

Ordering Information

Part Number	Description
QSFP-40G-LR4-C	40GBASE-LR4 QSFP+ Transceiver, LC, SMF, 10km

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