Does this optic support OTU4 protocols for our telecom optical transport network, or just standard 100G Ethernet?

It is highly versatile. Besides being fully compliant with 100GBASE-ER4 Ethernet standards, it supports standard OTN OTU4 data rates, making it perfect for both enterprise data center interconnects (DCI) and long-haul telecom transport network applications.

We are rolling out a regional ISP upgrade and need about 60 of these 100G LAN-WDM modules. Do you offer bulk discounts?

Absolutely! For large-scale B2B procurements of our 100G QSFP28 40km transceivers, please contact our B2B sales team. We provide tiered volume pricing and dedicated procurement support for enterprise and ISP clients.

We plan to install these in unventilated outdoor telecom cabinets. Do you have an industrial wide-temperature version of this 100G optic?

This specific module is designed for standard commercial operating temperatures (0°C to 70°C). However, we do offer an industrial-grade version (-40°C to 85°C) for this exact 1310nm 40km spec. Please check our store or contact support directly for the industrial SKU.

Can I use multimode fiber for a quick test in the lab, or is this strictly for single-mode?

This 1310nm LAN-WDM transceiver is designed exclusively for Single Mode Fiber (SMF) with a Duplex LC connector. To prevent receiver saturation and hardware damage on short test runs, we strongly recommend using OS2 SMF cable along with appropriate optical attenuators (usually 5dB to 10dB for lab testing).

Will this 100G QSFP28 40km module work with our mix of Cisco Nexus and Arista datacenter switches?

Yes, these extended-reach transceivers are strictly tested for OEM compatibility. They will plug and play seamlessly with Cisco, Arista, Juniper, Ubiquiti, and other major switch brands right out of the box without any vendor lock-in issues.

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Cisco QSFP-100G-ER4L-S Compatible LINK-PP 100G QSFP28 LAN-WDM 1310nm 40km Duplex LC DDM SMF Optical Transceiver Module

Name: Cisco QSFP-100G-ER4L-S Compatible LINK-PP 100G QSFP28 LAN-WDM 1310nm 40km Duplex LC DDM SMF Optical Transceiver Module
Brand: LINK-PP
SKU: 217063
Price: 1210 USD
Availability: InStock
Rating: 4.9 (30 reviews)

Product: Cisco QSFP-100G-ER4L-S Compatible LINK-PP 100G QSFP28 LAN-WDM 1310nm 40km Duplex LC DDM SMF Optical Transceiver Module
SKU: 217063
P/N: LQ-LW100-ER4C
Price: $ 1,375
Stock: 8051 in Stock
Sold: 2.2K
Product URL: https://www.l-p.com/products/472709.htm

For Order Over $1000 Get $15.00 Off , Code: Linkpp15

For Order Over $3000 Get $50.00 Off , Code: Linkpp50

For Order Over $5000 Get $100.00 Off , Code: Linkpp100

New Users: $10 Coupon for Orders , Code: linkpp2610

30 Reviews

5 Questions

2.2K Sold

$ 1,375

Free shipping. For wholesale pricing, please contact us directly.

Qty (pcs) :

Unit Price :

$ 1,375

$ 1,333.75

100

$ 1,292.5

1000

$ 1,251.25

3000

$ 1,210

Manufacture: LINK-PP P/N: LQ-LW100-ER4C SKU: 217063

Compatible:: Cisco; LINK-PP; Alcatel-Lucent; Allied Telesis; Arista; Avago; Brocade; Check Point; Chelsio; Ciena; D-Link; Dell; Edge-Core; Extreme; F5 Networks; FS; Fortinet; Generic; H3C; HPE Aruba; HW; Intel; Juniper; MRV; Mikrotik; NVIDIA/Mellanox; Palo Alto

Compatible P/N:: QSFP-100G-LR4-I | 10km; QSFP-100G-LR4-S | 10km; QSFP-4W20-100G-I | 20km; QSFP-100G-4W40-I | 40km; QSFP-100G-ER4L-S | 40km; QSFP-100G-ZR4-S | 80km; QSFP-ZR4-100G-I | 80km; QSFP-EZR4-100G | 100km

Shipping:

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to United States via FedEx

Estimated delivery time : 3-10 days.

5-Year Warranty 30-Day Returns 30-Day Exchange

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Cisco QSFP-100G-ER4L-S Compatible LINK-PP 100G QSFP28 Specifications

The Cisco QSFP-100G-ER4L-S Compatible LINK-PP module is a high-performance 100G QSFP28 ER4 optical transceiver engineered for long-haul single-mode fiber communications. Operating over a LAN-WDM multiplexed grid across four channels, it strictly complies with QSFP28 MSA, IEEE 802.3ba 100GBASE-ER4, and OTN OTU4 standards to ensure robust 100Gbps transmission up to 40km with integrated DDM capabilities.

Cisco Part Number	QSFP-100G-ER4L-S	Vendor Name	LINK-PP
Form Factor	QSFP28	Max Data Rate	111.81Gbps
Wavelength	1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm	Max Cable Distance	40km
Connector	Duplex LC	Media	SMF
Transmitter Type	EML	Receiver Type	APD
DDM/DOM	Supported	Operating Temperature Range	0°C to +70°C
Modulation (Electrical)	4x 25G-NRZ	Modulation (Optical)	4x 25G-NRZ
Protocols	QSFP28 MSA, SFF-8636, IEEE 802.3bm, CAUI-4	Warranty	5 Years

Key Features of Cisco QSFP-100G-ER4L-S Compatible LINK-PP 100G QSFP28

This high-density 100G QSFP28 ER4 module leverages advanced cooled EML lasers and high-sensitivity APD receivers to guarantee superior signal integrity over extended distances. It seamlessly integrates four LAN-WDM lanes into a duplex LC interface, minimizing fiber deployment costs while maintaining exceptional network reliability for telecommunications and data center interconnects.

Cisco QSFP-100G-ER4L-S Compatible LINK-PP 100G QSFP28 Optical Module

Engineered for maximum optical efficiency, this reliable 100G QSFP28 ER4 transceiver provides seamless 100Gbps connectivity over 40km of single-mode fiber with precision diagnostic monitoring.

QSFP-100G-ER4L-S : 100Gbps Connectivity for Metro DCI and Backbone Links

The QSFP-100G-ER4L-S provides stable 100Gbps connectivity for metro data center interconnects and campus backbone links where longer SMF reach is required. Its 40km design helps extend high-speed transport beyond standard short-reach optics while keeping the fiber plant simple.

QSFP-100G-ER4L-S Module with LAN-WDM Technology for Fiber Efficiency

Built on LAN-WDM technology, the 100G QSFP28 ER4 module carries 100G traffic across duplex SMF with efficient wavelength multiplexing. This reduces fiber complexity and supports high-capacity transmission without requiring parallel fiber bundles.

QSFP-100G-ER4L-S Module with Central Wavelengths of 4 Channels 1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm

Utilizing the LAN-WDM grid, these tightly spaced optical channels operate within the O-band where chromatic dispersion is naturally minimized. This precise wavelength allocation ensures stable optical performance and virtually eliminates channel crosstalk over long single-mode fiber spans.

QSFP-100G-ER4L-S Module Supporting 40km Transmission

Utilizing high-gain Avalanche Photodiode (APD) technology, this 100G QSFP28 ER4 transceiver efficiently compensates for optical link loss over extended physical reaches. It provides a reliable, error-free data pipeline for long-haul 40km inter-site connectivity without the immediate need for external optical amplifiers.

QSFP-100G-ER4L-S Module with Duplex LC Interface

Equipped with an industry-standard Duplex LC receptacle, the module ensures precise optical alignment and low insertion loss for single-mode fiber connections. This universally adopted interface simplifies patching in dense routing environments and guarantees backward compatibility with standard optical cabling systems.

QSFP-100G-ER4L-S Module with DDM for Real-Time Monitoring

With DOM support, the QSFP-100G-ER4L-S allows real-time monitoring of key transceiver parameters, helping teams track link health and troubleshoot issues faster. This improves operational visibility in high-availability 100G QSFP28 ER4 environments.

Cisco QSFP-100G-ER4L-S Compatible LINK-PP 100G QSFP28 Certification

The QSFP-100G-ER4L-S is positioned as a QSFP28 MSA-compliant 100G optical transceiver that undergoes strict quality and compatibility validation for dependable deployment.

QSFP-100G-ER4L-S Quality Testing Program

Each unit is evaluated through a structured testing program to verify optical performance, link stability, and operational consistency.

QSFP-100G-ER4L-S Quality Certifications

The 100G QSFP28 ER4 module holds comprehensive compliance certifications including CE, FCC, RoHS, and MSA, ensuring safe and eco-friendly operation.

QSFP-100G-ER4L-S Certified for Reliable Host-Device Compatibility

Certified through extensive multi-vendor switch testing to guarantee plug-and-play interoperability without vendor lock-in issues.

Rigorous Testing Ensures Reliable QSFP28 Performance

Rigorous testing protocols are implemented during manufacturing to ensure every 100G QSFP28 ER4 unit delivers flawless performance and long-term stability in high-demand network environments.

Rigorous Testing Ensures Reliable Transceiver Performance

Optical Spectrum Test

Measures the central wavelengths and spectral width to confirm strict adherence to LAN-WDM grid specifications.

Eye Pattern Test

Evaluates optical signal quality, jitter, and rise/fall times to guarantee IEEE 802.3ba compliance.

Bit Error Rate Test

Subjects the transceiver to sustained high-speed data traffic to verify zero packet loss over the maximum 40km reach.

Temperature Test

Simulates harsh operational environments from 0 to 70 degrees Celsius to validate thermal stability and laser longevity.

Product Shipping for Cisco QSFP-100G-ER4L-S Compatible LINK-PP 100G QSFP28

LINK-PP ensures the safe and rapid global delivery of the QSFP-100G-ER4L-S 100G QSFP28 ER4 modules through a secure, standardized logistics framework designed to protect sensitive optical components.

Anti-Static Protective Packaging

Each 100G QSFP28 ER4 transceiver is sealed in an ESD-safe bag to prevent electrostatic discharge damage during handling and transit.

Shock-Resistant Transport Protection

Custom-molded foam inserts are used within the shipping cartons to absorb physical impact and vibration.

Fast Order Processing and Dispatch

Automated inventory management guarantees immediate order fulfillment and prompt dispatch for in-stock items.

Global Logistics and International Delivery

Partnerships with top-tier couriers provide end-to-end tracking and expedited shipping to worldwide data center locations.

Cisco QSFP-100G-ER4L-S Compatible LINK-PP 100G QSFP28 Usage Demonstration

Installing the Cisco QSFP-100G-ER4L-S Compatible LINK-PP involves smoothly inserting the hot-pluggable 100G QSFP28 ER4 module into a compatible QSFP28 switch port until the mechanical latch clicks securely into place. Once seated, technicians connect the single-mode fiber patch cord to the Duplex LC interface, allowing the network management system to instantly read the DDM telemetry and establish a stable 100Gbps link.

QSFP-100G-ER4L-S Technical Support

LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.

Pre-Sales Technical Consultation

Professional technical guidance to help customers select the most suitable QSFP-100G-ER4L-S modules based on network architecture and application requirements.

Compatibility Verification Support

Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.

Deployment & Installation Assistance

Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.

Long-Term Technical Assurance

Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.

Cisco QSFP-100G-ER4L-S Compatible LINK-PP 100G QSFP28 After-Sales Assurance

LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.

15-day no-reason return and refund

Free replacement for dead-on-arrival (DOA) or defective items within the initial period

Free repair services for manufacturing defects throughout the warranty period

Warranty exclusions and conditions apply

Model Comparison Table

	Current Model QSFP-100G-ER4L-S	QSFP-100G-4W40-I

Compatible	Cisco	Cisco
Data Rate (Max)	111.81Gbps	111.81Gbps
Wavelength	1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm	1295.56nm, 1300.05nm, 1304.58nm and 1309.14nm
Connector	Duplex LC	Duplex LC
Cable Distance (Max)	40km	40km
Cable Type	SMF	SMF
Operating Temperature	0°C to +70°C	-40°C to +85°C
Vendor Name	LINK-PP	LINK-PP
Form Factor	QSFP28	QSFP28
Transmitter Type	EML	EML
Receiver Type	APD	APD
DDM/DOM	Supported	Supported
Modulation (Electrical)	4x 25G-NRZ	4x 25G-NRZ
Modulation (Optical)	4x 25G-NRZ	4x 25G-NRZ
Protocols	QSFP28 MSA, SFF-8636, IEEE 802.3bm, CAUI-4	QSFP28 MSA,IEEE 802.3-2018,4WDM-40,SFF-8661,SFF-8636
Warranty	5 Years	5 Years

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Q: Does this optic support OTU4 protocols for our telecom optical transport network, or just standard 100G Ethernet? By B***s on 2026-06-01

A: It is highly versatile. Besides being fully compliant with 100GBASE-ER4 Ethernet standards, it supports standard OTN OTU4 data rates, making it perfect for both enterprise data center interconnects (DCI) and long-haul telecom transport network applications. By admin on 2026-06-01
Q: We are rolling out a regional ISP upgrade and need about 60 of these 100G LAN-WDM modules. Do you offer bulk discounts? By N***n on 2026-04-10

A: Absolutely! For large-scale B2B procurements of our 100G QSFP28 40km transceivers, please contact our B2B sales team. We provide tiered volume pricing and dedicated procurement support for enterprise and ISP clients. By admin on 2026-04-10
Q: We plan to install these in unventilated outdoor telecom cabinets. Do you have an industrial wide-temperature version of this 100G optic? By T***s on 2025-06-25

A: This specific module is designed for standard commercial operating temperatures (0°C to 70°C). However, we do offer an industrial-grade version (-40°C to 85°C) for this exact 1310nm 40km spec. Please check our store or contact support directly for the industrial SKU. By admin on 2025-06-25
Q: Can I use multimode fiber for a quick test in the lab, or is this strictly for single-mode? By J***k on 2025-06-12

A: This 1310nm LAN-WDM transceiver is designed exclusively for Single Mode Fiber (SMF) with a Duplex LC connector. To prevent receiver saturation and hardware damage on short test runs, we strongly recommend using OS2 SMF cable along with appropriate optical attenuators (usually 5dB to 10dB for lab testing). By admin on 2025-06-12
Q: Will this 100G QSFP28 40km module work with our mix of Cisco Nexus and Arista datacenter switches? By M***s on 2025-02-15

A: Yes, these extended-reach transceivers are strictly tested for OEM compatibility. They will plug and play seamlessly with Cisco, Arista, Juniper, Ubiquiti, and other major switch brands right out of the box without any vendor lock-in issues. By admin on 2025-02-15

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D***n

Dominican Republic

Verified Purchase

5 .0

2026-05-21

Replaced failing optics with these LAN-WDM SMF modules. Instantly recognized by our Mikrotik router.

192 Helpful vote Comments

J***s

Australia

Verified Purchase

5 .0

2026-05-07

DDM works perfectly right out the box.

42 Helpful vote Comments

N***r

Malaysia

Verified Purchase

5 .0

2026-02-08

Clean 1310nm signal, zero dropped packets.

62 Helpful vote Comments

J***z

Belgium

Verified Purchase

5 .0

2025-12-17

Reliable duplex LC 100G link for our metro network. DDM tracking is super helpful.

159 Helpful vote Comments

J***r

Austria

Verified Purchase

4 .0

2025-10-19

Delivery was delayed by DHL. Otherwise, these QSFP28 40km optics are rock solid.

79 Helpful vote Comments

L***s

Tunisia

Verified Purchase

4 .0

2025-10-05

Box arrived slightly crushed, but the 100G 40km ER4 module performs perfectly.

164 Helpful vote Comments

N***s

Ecuador

Verified Purchase

5 .0

2025-09-27

Great duplex LC 100G module for the price.

154 Helpful vote Comments

J***r

Indonesia

Verified Purchase

5 .0

2025-09-18

Tested this 100G 40km module in our edge telecom site. OEM compatibility is superb.

67 Helpful vote Comments

J***s

Czech Republic

Verified Purchase

5 .0

2025-09-07

Needed reliable 100G extended reach for a regional ISP backbone. These duplex LC transceivers synced instantly with Juniper MX. Flawless 1310nm performance over our 38km single-mode fiber ring.

149 Helpful vote Comments

M***l

Macao

Verified Purchase

5 .0

2025-08-26

Rock solid SMF transceiver for metro distances.

62 Helpful vote Comments

B***z

Brazil

Verified Purchase

5 .0

2025-06-23

Synced instantly with my core HP switch.

100 Helpful vote Comments

M***k

Argentina

Verified Purchase

5 .0

2025-04-24

Great OEM compatibility! These 100G 40km modules worked perfectly in our Ubiquiti aggregate switches.

87 Helpful vote Comments

C***z

Argentina

Verified Purchase

5 .0

2025-01-29

Plug and play 100G link, absolutely fantastic.

85 Helpful vote Comments

L***n

Costa Rica

Verified Purchase

5 .0

2025-01-11

Fast 100G speeds, highly reliable ER4 optics.

74 Helpful vote Comments

R***D

Poland

Verified Purchase

5 .0

2023-09-13

As always quick and easy process.

84 Helpful vote Comments

V***c

Malaysia

Verified Purchase

5 .0

2023-09-09

Excellent website! Great prices and Fast delivery.

20 Helpful vote Comments

W***M

Canada

Verified Purchase

5 .0

2023-07-02

Detected right away and no issues. Price is great

31 Helpful vote Comments

J***M

Brunei Darussalam

Verified Purchase

5 .0

2023-05-01

l-p.com is a delight to do business with. Contact them with any concerns and they will assist us to our satisfaction.

37 Helpful vote Comments

F***o

United States

Verified Purchase

5 .0

2023-02-16

really great services

65 Helpful vote Comments

S***y

Mexico

Verified Purchase

5 .0

2023-02-06

Very easy to find products in product list. Very customer friendly ordering process.

132 Helpful vote Comments

L***i

Germany

Verified Purchase

5 .0

2022-12-16

Good site, quick access to optical devices I was looking for, Except that shipping is a little slow.

112 Helpful vote Comments

T***a

United Arab Emirates

Verified Purchase

5 .0

2022-09-22

GREAT! Exactly what I wanted and expected.

28 Helpful vote Comments

M***m

Netherlands

Verified Purchase

5 .0

2022-08-08

Amazing prices, prompt service, super Fast delivery, huge selection of product.

55 Helpful vote Comments

J***m

United States

Verified Purchase

5 .0

2022-07-02

Great shopping experience. Can't wait to get my items...

106 Helpful vote Comments

Z***o

United States

Verified Purchase

5 .0

2022-03-10

Items correct and Fast shipping.

96 Helpful vote Comments

E***E

New Zealand

Verified Purchase

5 .0

2022-02-13

Quick and reliable service at a competitive price, Would use again.

48 Helpful vote Comments

L***r

Ireland

Verified Purchase

5 .0

2021-09-10

New to this vendor. So far so good. The product arrived in a very timely manner.

65 Helpful vote Comments

V***v

Belgium

Verified Purchase

5 .0

2021-05-30

Link-pp gives me the best price on brand new electronics along with prompt delivery. I love this store!

34 Helpful vote Comments

S***i

United States

Verified Purchase

5 .0

2021-03-06

The overall service was great!

141 Helpful vote Comments

M***i

New Zealand

Verified Purchase

5 .0

2021-02-05

I have ordered three LAN Magnetic Transformer for my project and all those I am getting are reasonably priced and will be delivered next day which is perfect.

51 Helpful vote Comments