What data rate does the QSFP-40GE-LR4-S support?

It supports up to 40 Gbps aggregate data rate, with 4×10 Gbps channels for LR4 optical transmission.

Is the QSFP-40GE-LR4-S hot-pluggable?

Yes. The hot-pluggable design allows insertion and removal without powering down the host device.

What optical wavelengths are used in LR4 modules?

It utilizes four LAN-WDM wavelengths around 1295 nm to 1310 nm for efficient 40 GbE transmission.

Is it compliant with industry standards?

Yes. It meets the IEEE 802.3ba and MSA specifications for 40GBASE-LR4 QSFP+ modules.

Does the module support digital diagnostics monitoring (DDM)?

Yes. It features DDM/DOM for real-time monitoring of optical power, temperature, and voltage.

What is the power consumption of the QSFP-40GE-LR4-S?

Typical power consumption is below 3.5 W, helping maintain low energy usage in your data center.

What are the operating temperature ranges?

The module operates between 0 °C and 70 °C ambient temperature for standard applications.

Which switches and routers is it compatible with?

It is compatible with all QSFP+ ports on major brands including Cisco, Juniper, Arista, HP, Dell, and Huawei.

What applications are ideal for the LR4 QSFP+ transceiver?

Ideal for 40 GbE data center interconnects, core-edge aggregation, and high-speed enterprise networks.

How do I install the QSFP-40GE-LR4-S?

Simply slide the module into a compatible QSFP+ port until it clicks, then connect your LC fiber patch cables.

How can I test the transceiver after installation?

Use fiber optical test equipment or built-in DDM to verify signal strength, wavelength, and link status.

What is the warranty on the QSFP-40GE-LR4-S?

It includes a limited lifetime warranty covering defects in materials and workmanship under normal use.

How should I store the QSFP+ transceiver when not in use?

Store it in the original antistatic packaging at –20 °C to 75 °C, with relative humidity between 5% and 95% non-condensing.

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QSFP-40GE-LR4-S

Name: 40GBASE-LR4 QSFP+ transceiver module for SMF, duplex LC connector, 10 km reach
Brand: Cisco
SKU: QSFP-40GE-LR4-S
Rating: 4.4 (7 reviews)

Description:: 40GBASE-LR4 QSFP+ transceiver module for SMF, duplex LC connector, 10 km reach
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QSFP-40GE-LR4-S Overview

QSFP-40GE-LR4-S is a high-performance QSFP transceiver designed to deliver 40G Ethernet connectivity over long-range networks. This transceiver employs LC connectors and single-mode fiber to achieve transmission distances up to 10 km, making it ideally suited for data center interconnects, enterprise networks, and telecom applications while supporting industry-standard Ethernet protocols.

The QSFP-40GE-LR4-S features a compact QSFP form factor with specifications that adhere to strict vendor standards. Its efficient power consumption, reliable operation over a wide temperature range, and compatibility with leading network equipment brands ensure that it meets the demands of high-speed, long-distance data communications in modern network infrastructures.

QSFP-40GE-LR4-S price is is available on request. Get immediate quote.

Request bulk order quote for QSFP-40GE-LR4-S for additional pricing. Browse the full Cisco 40G Optical Modules series or explore all Cisco products.

QSFP-40GE-LR4-S Specifications

Product Type: Transceiver
Form Factor: QSFP
Data Rate: 40G
Connector Type: LC
Wavelength: 1271/1294/1318/1341 nm
Transmission Distance: Long-Range
Fiber Type: Single-mode
Max Distance: 10 km
Supported Protocols: Ethernet
Network Interface: Ethernet
Power Consumption: 5.5W
Operating Temperature: 0 to 70°C
Storage Temperature: -40 to 85°C
Input Voltage: 3.3V
Compatibility: Cisco, Juniper, Huawei, Arista
Product Name: QSFP-40GE-LR4-S
Height: N/A
Width: N/A
Depth: N/A
Weight: N/A

Quality Certifications

To get the detailed certification, please go to the Compliance Center.

Product Comparison Table

	QSFP-40GE-LR4-S	QSFP-40G-SR-BD=	QSFP-40G-LR4-S	QSFP-40G-LR4-S=	QSFP-40G-CSR4=
Compatibility	Cisco, Juniper, Huawei, Arista	Cisco / Juniper / Huawei / Arista	Cisco / Juniper / Huawei / Arista	Cisco / Juniper / Huawei / Arista	Cisco
Connector Type	LC	LC	LC	LC	LC
Data Rate	40G	40G	40G	40G	40G
Depth	N/A	N/A	N/A	N/A	N/A
Fiber Type	Single-mode	Multi-mode	Single-mode	Single-mode	Multi-mode
Form Factor	QSFP	QSFP	QSFP	QSFP	QSFP
Height	N/A	N/A	N/A	N/A	N/A
Input Voltage	3.3V	3.3V	3.3V	3.3V	3.3V
Max Distance	10 km	150 meters	10 km	10 km	100 m
Network Interface	Ethernet	Ethernet	Ethernet	Ethernet	Ethernet
Operating Temperature	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C
Power Consumption	5.5W	3.8W	5.0 W	N/A	N/A
Product Name	QSFP-40GE-LR4-S	QSFP-40G-SR-BD=	QSFP-40G-LR4-S	QSFP-40G-LR4-S=	QSFP-40G-CSR4=
Product Type	Transceiver	Transceiver	Transceiver	Transceiver	Transceiver
Storage Temperature	-40 to 85°C	-40 to 85°C	-40 to 85°C	-40 to 85°C	-40 to 85°C
Supported Protocols	Ethernet	Ethernet	Ethernet	Ethernet	Ethernet
Transmission Distance	Long-Range	Short-Range	Long-Range	Long-Range	Short-Range
Wavelength	1271/1294/1318/1341 nm	850nm	1310 nm	1310 nm	850 nm
Weight	N/A	N/A	N/A	N/A	N/A
Width	N/A	N/A	N/A	N/A	N/A

Reviews & Ratings

Harvey Loxley

Achieved stable 40G connectivity over 10km SMF. Reliable optics with consistent signal strength for backbone links.

Isaac Thornhill

Smooth deployment and excellent interoperability. Maintained full 40G throughput without errors.

Julian Crestwood

Ideal for long-range data center interconnects. Strong optical stability and low latency.

Keaton Blythe

Dependable LR4 module delivering clean performance across our core network.

Lloyd Fenmore

Consistent 10km reach with no signal degradation. Highly satisfied.

Malcolm Vance

Reliable 40G QSFP+ solution for SMF infrastructure upgrades.

Nathan Crowhurst

Stable and efficient long-distance 40G connectivity.

Questions & Answers

What is the QSFP-40GE-LR4-S transceiver module?

The QSFP-40GE-LR4-S is a 40GBASE-LR4 QSFP+ transceiver for single-mode fiber (SMF) with duplex LC connectors and a reach of up to 10 km.

Which fiber type does the QSFP-40GE-LR4-S support?

The module supports single-mode fiber (SMF) for long-reach, high-bandwidth 40 GbE links.

What is the maximum transmission distance?

It delivers reliable 40 GbE connectivity up to 10 km over SMF using industry-standard optical components.

What connector style does this transceiver use?

It uses a duplex LC connector for simple and secure fiber connections in high-density environments.

Related Searches Cisco 40G Optical Modules

QSFP-40GE-LR4 QSFP-100G-ER4L-S=QSFP-40G-CSR-S=QSFP-40G-LR4 QSFP-40G-LR4=QDD-400G-FR4-S QSFP-40GE-LR4-C QSFP-100G-LR4-S=

QSFP-40GE-LR4-S Overview

QSFP-40GE-LR4-S price is is available on request. Get immediate quote.

Request bulk order quote for QSFP-40GE-LR4-S for additional pricing. Browse the full Cisco 40G Optical Modules series or explore all Cisco products.

QSFP-40GE-LR4-S Specifications

Product Type

Transceiver

Form Factor

QSFP

Data Rate

40G

Connector Type

Wavelength

1271/1294/1318/1341 nm

Transmission Distance

Long-Range

Fiber Type

Single-mode

Max Distance

10 km

Supported Protocols

Ethernet

Network Interface

Ethernet

Power Consumption

5.5W

Operating Temperature

0 to 70°C

Storage Temperature

-40 to 85°C

Input Voltage

3.3V

Compatibility

Cisco, Juniper, Huawei, Arista

Product Name

QSFP-40GE-LR4-S

Height

N/A

Width

N/A

Depth

N/A

Weight

N/A

Product Comparison Table

	QSFP-40GE-LR4-S	QSFP-40G-SR-BD=	QSFP-40G-LR4-S	QSFP-40G-LR4-S=	QSFP-40G-CSR4=
Compatibility	Cisco, Juniper, Huawei, Arista	Cisco / Juniper / Huawei / Arista	Cisco / Juniper / Huawei / Arista	Cisco / Juniper / Huawei / Arista	Cisco
Connector Type	LC	LC	LC	LC	LC
Data Rate	40G	40G	40G	40G	40G
Depth	N/A	N/A	N/A	N/A	N/A
Fiber Type	Single-mode	Multi-mode	Single-mode	Single-mode	Multi-mode
Form Factor	QSFP	QSFP	QSFP	QSFP	QSFP
Height	N/A	N/A	N/A	N/A	N/A
Input Voltage	3.3V	3.3V	3.3V	3.3V	3.3V
Max Distance	10 km	150 meters	10 km	10 km	100 m
Network Interface	Ethernet	Ethernet	Ethernet	Ethernet	Ethernet
Operating Temperature	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C
Power Consumption	5.5W	3.8W	5.0 W	N/A	N/A
Product Name	QSFP-40GE-LR4-S	QSFP-40G-SR-BD=	QSFP-40G-LR4-S	QSFP-40G-LR4-S=	QSFP-40G-CSR4=
Product Type	Transceiver	Transceiver	Transceiver	Transceiver	Transceiver
Storage Temperature	-40 to 85°C	-40 to 85°C	-40 to 85°C	-40 to 85°C	-40 to 85°C
Supported Protocols	Ethernet	Ethernet	Ethernet	Ethernet	Ethernet
Transmission Distance	Long-Range	Short-Range	Long-Range	Long-Range	Short-Range
Wavelength	1271/1294/1318/1341 nm	850nm	1310 nm	1310 nm	850 nm
Weight	N/A	N/A	N/A	N/A	N/A
Width	N/A	N/A	N/A	N/A	N/A

Questions & Answers

What is the QSFP-40GE-LR4-S transceiver module?

The QSFP-40GE-LR4-S is a 40GBASE-LR4 QSFP+ transceiver for single-mode fiber (SMF) with duplex LC connectors and a reach of up to 10 km.

Which fiber type does the QSFP-40GE-LR4-S support?

The module supports single-mode fiber (SMF) for long-reach, high-bandwidth 40 GbE links.

What is the maximum transmission distance?

It delivers reliable 40 GbE connectivity up to 10 km over SMF using industry-standard optical components.

What connector style does this transceiver use?

It uses a duplex LC connector for simple and secure fiber connections in high-density environments.