Cisco QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ 1310nm 20km DDM LC SMF Optical Transceiver Module

Name: Cisco QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ 1310nm 20km DDM LC SMF Optical Transceiver Module
Brand: QSFPTEK
SKU: 100023
Price: 169.0 USD
Rating: 5.0 (125 reviews)

Product No :100023

US$ 169.00 ~~US$ 279.00~~

Specifications

Cisco QSFP-LR4-40G-20 Compatible 40GBASE-LR4 QSFP+ Optical Transceiver Module (SMF, 1310nm, 20km, LC, DDM)

The Cisco QSFP-LR4-40G-20 compatible 40G QSFP+ LR4 transceiver module is equipped with LC duplex connectors, reaching a link up to 20km over OS2 single-mode fiber (SMF). This 40G optical transceiver comes with a bidirectional 4-channel QSFP+ connector, enabling a total of 40 Gbps bandwidth by each channel carrying a 10 Gbps data rate. DOM/DDM (digital diagnostics monitoring) function is supported on the QSFP 40G fiber optic transceiver to achieve real-time operating parameters monitoring.

QSFPTEK manufactured 40GBASE-LR4 QSFP+ module is compliant with QSFP+ MSA and 40GBASE-LR4 specifications. Besides, the QSFP LR4 optic has been tested on host devices to ensure full compatibility with Cisco equipment, such as data center switches, enterprise routers, and server network interface cards (NICs). The third-party 40G SFP module is an ideal substitute to the QSFP-40GE-LR4 QSFP+ 40G transceiver at an affordable price, providing a cost-effective compatible solution for high-performance 40G connectivity.

LR4 40G QSFP optics cater to 40 Gigabit Ethernet (40GbE) optical fiber connections, ideal for high-performance and long-distance applications in the data center, enterprise core and distribution layers, campus networks, metro networks, etc.

Model Name	QSFP-LR4-40G-20	Vendor Name	QSFPTEK
Form Factor	QSFP+	Data Rate	40 Gbps
Wavelength	1310nm	Distance	20km@OS2
Connector	LC Duplex	Cable Type	OS2 SMF
Transmitter Type	DFB	Receiver Type	PIN
TX Power	-4~2.3dBm	Receiver Sensitivity	<-11.5dBm
Power Consumption	<3.5W	Modulation Format	NRZ
DDM	Support	Bit Error Ratio (BER)	1E-12
Protocols	QSFP+ MSA, SFF-8436, 40G Ethernet	Warranty	5 Years

Quality Testing Program

Optical Transceivers Testing

Take a look at our test program to get the reliable and high-performance optical transceivers.

Quality Certifications

Features

1. High Reliablility and Best Price

Proudly self-producing and rigorous testing, QSFPTEK is dedicated to delivering cost-effective products with high reliability and performance at a trade price.
2. Wide Application Scenarios

Fully compatible with almost all Cisco devices. Ideal for data center, campus network, metro network, etc.
3. Protocols

Compliant with QSFP+ MSA, SFF-8436, 40G Ethernet.
4. Quality Certifications

Backed by CE, FCC, ROSH, ISO9001.

Applications

Connection 1: 40GBASE-LR4 Connectivity

40GBASE-LR4 Connectivity

Product details

Various Switch Tests

Every module is quality tested for compatibility in the multi-brand switches environment, which guarantees flawless operations.

transceiver compatibility tests

Tested in The Host Device to Prove Interoperability

Every unit sold undergoes rigorous quality testing, to ensure compatibility in the target switch environment, guaranteeing perfect operation.

Various Switch Tests

Every module is qualified through rigorous procedures and advanced equipment to ensure high-quality and reliable optical devices for you.

40G QSFP+ Model Contrast Table

Part Number	QT-QSFP+-SR4	QT-QSFP+-IR4	QT-QSFP+-PSM4	QT-QSFP+-LR4	QT-QSFP+-LR4-20	QT-QSFP+-ER4	QT-QSFP+-ZR4
Image
Wavelength	850nm	CWDM	1310nm	CWDM	CWDM	CWDM	LWDM 1294~1310nm
Max Distance	150m	2km	10km	10km	20km	40km	80km
Cable Type	OM3/OM4 MMF	OS2 SMF	OS2 SMF	OS2 SMF	OS2 SMF	OS2 SMF	OS2 SMF
Connector	MPO/MTP-12	LC Duplex	MPO/MTP-12	LC Duplex	LC Duplex	LC Duplex	LC Duplex
Tx Power(dBm)	-7 ~ 1	-7 ~ 2.3	-6 ~ -1	-7 ~ 2.3	-4 ~ 2.3	-2.7 ~ 4.5	-2.7 ~ 4.5
Rx Sensitivity(dBm)	-9.5	-11.5	-14.4	-13.7	-11.5	-19	-28
Power Consumption	<0.7W	<2.5W	<2.5W	< 2.5W	<3.5W	<3.5W	<5W
Source	VCSEL + PIN	DFB + PIN	4xDFB + PIN	DFB + PIN	DFB + PIN	DFB + PIN	4xDFB + APD
Operating Temperature	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C

Questions & Answers

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Can this module work at 80°C?

No, it can't. The working temperature range is 0 to 70°C.
Does the qsfp-40g-sr4 transceivers allow 4x 10g connectivity?

Yes. The connectivity is achieved by using an 8-fibers OM4 MTP-LC Type B break-out cable, which connects the qfp-40g-sr4 transceivers to four sfp-10g-sr optical interfaces.
What is the difference between Cisco qspf-40g-lr4 and qsfp-40g-lr4-s?

They are actually the same one.

Customer Reviews

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(125 Reviews)

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Cornell DuBois France

2023-07-28

For almost a month now, I have had these modules installed in our data center. The results have been nothing short of impressive, as they seamlessly connected our Cisco switches, establishing a rock-solid 40Gbe network. I couldn't be happier with my purchase, and the performance of these modules has exceeded my expectations. Without a doubt, I will confidently recommend them to others seeking reliable networking solutions.

Transceivers typeQSFP-40G-LR4

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Nahum United States of America

2023-04-21

This QSFP item is excellent and reasonably priced. It functions properly on my Cisco Catalyst C6824-X-LE series switch and has been thoroughly tested for stability. I will certainly purchase it again for my next project build.

Transceivers typeQSFP-40G-LR4

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Emlyn United States of America

2023-04-21

We had a positive experience with the 40G SR4 and MTP cable. They performed as expected, and our Cisco 2960S accepted them with no problems. Additionally, the price was reasonable, and the service was exceptional. We will definitely consider using qsfptek as a priority supplier for any future needs.

Transceivers typeQSFP-40G-SR4

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Phoebe United States of America

2023-04-14

I'm so happy I decided to go with Talia for my switch needs. Their products are top-notch and the price is unbeatable. Also, they have proven to be a reliable and cost-effective solution for my network.

Transceivers type430-4593

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Nicole France

2023-04-13

After trying out multiple switch brands, I can confidently say that they offers the best combination of quality and affordability. They work smoothly and have saved me a lot of money.

Transceivers type430-4593

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Nicole United States of America

2023-04-13

Initially, I harbored reservations regarding the caliber of the product prior to acquiring it. However, the sales manager's assiduous elucidation of their return policy allayed my fears. Moreover, the fact that they offer a five-year warranty and 24/7 customer service brought about a sense of comfort and led me to endorse procuring from QSFPTEK.

Transceivers typeQSFP-40G-SR4

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Rickey United Kingdom

2023-04-03

I bought their optical modules once last year and had no problems with compatibility. So this time I ordered the switch again, and it is now well connected with my equipment, the signal is more stable and the transmission rate is fast.

Transceivers typeQSFP-40G-LR4-S

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Massimo United Kingdom

2023-04-03

Goes well with my network device and is easy to use, features DDM allowing fast actions if any unusual situation happens, which keeps me free from worry. In addition, it benefits incomparable compatibility applied to all Cisco devices. Overall, l am satisfied with it, thanks.

Transceivers typeQSFP-40G-SR4

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United States of America

2023-03-31

I have used these 40G modules for nearly a month. I feel so good until now. They run very fast and stably.And the shipping and delivery was fast, I will keep an eye out for this type of product.

Transceivers typeQSFP-40G-SR4

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Carr Price United States of America

2023-03-30

I have used a number of different optical transceivers over the years, but this 40G model is by far the best I have ever used. It is extremely reliable and has given me no issues whatsoever.

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