Are your optical modules compatible with Cisco, Huawei, Arista, and Juniper?

Yes. All HYTOPTODEVICE optical modules are 100% compatible with major brands including Cisco, Huawei, Arista, and Juniper switches and routers, with no configuration changes required.

Are your modules new or refurbished?

All HYTOPTODEVICE modules are brand new, original manufactured products. We do not sell refurbished or used optical modules.

Do your optical modules support DDM/DOM monitoring?

Yes. Our optical modules support Digital Diagnostic Monitoring (DDM/DOM), allowing real-time monitoring of temperature, voltage, current, TX power, and RX power.

What is your warranty policy?

HYTOPTODEVICE provides a standard warranty on all optical modules. Please contact our sales team for specific warranty terms and conditions.

Do you ship internationally from Shenzhen, China?

Yes. We ship worldwide from our facility in Shenzhen, China. International shipping is available for all orders including bulk and OEM orders.

Категории

Optical Transceiver

SFP

1.25G SFP

1.25G BiDi SFP

1.25G CWDM SFP 20KM

1.25G CWDM SFP 40KM

1.25G CWDM SFP 80KM

1.25G DWDM SFP 40KM

1.25G DWDM SFP 80KM

1.25G DWDM SFP 100KM

1.25G DWDM SFP 120KM

155M SFP

155M BiDi SFP

1.25G CSFP

SONET/SDH SFP

SFP+

10G SFP+

10G BiDi SFP+

10G CWDM SFP+

10G DWDM SFP+80KM

Fibre Channel SFP+

Customized SFP+

XFP

10G XFP

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10G CWDM XFP

10G DWDM XFP

Copper-T RJ45

10G Copper-T RJ45

1.25G Copper-T RJ45

25G SFP28

40G QSFP+

100G QSFP28

200G QSFP56

400G QSFP-DD

400G QSFP112

400G OSFP

800G OSFP/QSFP-DD

Ethernet Switch

800G OSFP InfiniBand

400G OSFP/QSFP112 InfiniBand

200G QSFP56 InfiniBand

100G QSFP28 InfiniBand

Active Optical Cable

10G SFP+ AOC

25G SFP28 AOC

40G QSFP+ AOC

100G QSFP28 AOC

200G QSFP56 AOC

800G QSFP-DD AOC

Direct Attach Cable

10G SFP+ DAC

25G SFP28 DAC

40G QSFP+ DAC

100G QSFP28 DAC

Optical Component

FEATURED

HPE Aruba S3N94A Compatible 400G QSFP-DD PLR4 Optical Transceiver Module | PAM4 1310nm 10km Bulk Wholesale | HYTOPTODEVICE

Dell 400G-Q56-DD-LDR4 Compatible 400G QSFP-DD PLR4 Optical Transceiver Module | PAM4 1310nm 10km Bulk Factory Wholesale | HYTOPTODEVICE

Arista QDD-400G-PLR4 Compatible 400G QSFP-DD PLR4 Optical Transceiver Module | PAM4 1310nm 10km MPO SMF | HYTOPTODEVICE

Cisco QDD-4X100G-LR-S Compatible 400G QSFP-DD PLR4 Optical Transceiver Module | PAM4 1310nm 10km MPO SMF | HYTOPTODEVICE

EdgeCore ET7402-PIR4 Compatible 100G QSFP28 Transceiver Module | PSM4 1310nm 500m MPO SMF Bulk Factory Wholesale | HYTOPTODEVICE

Huawei QSFP28-100G-PSM4 Compatible 100G QSFP28 Transceiver | PSM4 1310nm 500m MPO SMF Bulk & Wholesale | HYTOPTODEVICE

HPE JH420A Compatible 100G QSFP28 Transceiver Module | PSM4 1310nm 500m MPO SMF Bulk Factory Wholesale | HYTOPTODEVICE

Huawei QSFP28-100G-PSM4 Compatible 100G QSFP28 Transceiver | PSM4 1310nm 500m MPO SMF Bulk Factory Wholesale | HYTOPTODEVICE

Dell Q28-100G-PSM4-IR Compatible 100G QSFP28 Transceiver | PSM4 1310nm 500m MPO SMF Bulk Wholesale | HYTOPTODEVICE

Arista Networks QSFP-100G-PSM4 Compatible 100G QSFP28 Transceiver | PSM4 1310nm 500m MPO SMF Bulk & Wholesale | HYTOPTODEVICE

Cisco QSFP-100G-ER4L-S Compatible 100G QSFP28 ER4 Optical Transceiver Module | HYTOPTODEVICE

Shop HYTOPTODEVICE 100G QSFP28 ER4 Optical Transceiver fully compatible with Cisco QSFP-100G-ER4L-S. 100GBASE-ER4L 1310nm LAN-WDM 40km single-mode duplex LC connector, full DDM monitoring, pre-flashed Cisco firmware, plug-and-play for Cisco Catalyst, Nexus and ISR series network devices.Support small sample testing, OEM private labeling and EEPROM coding, bulk wholesale for global import distributors and enterprise end users.

NO.	Brand	Compatible P/N	Remarks
1	Cisco	QSFP-100G-ER4L-S
2	Arista Networks	QSFP-100G-ER4L-S
3	Dell	Q28-100G-ER4-lite
4	Huawei	QSFP-100G-ER4-Lite
5	Juniper Networks	QSFP-100G-ER4L
6	Ruijie Networks	100G-QSFP-ER4-SM1310

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Description

HYTOPTODEVICE Cisco QSFP-100G-ER4L-S Compatible 100G QSFP28 ER4 Optical Transceiver – 100GBASE-ER4L 1310nm 40km Single-Mode LC Optic, Cisco IOS Certified Drop-In Replacement, Bulk Wholesale & Custom Coding Available

Product Overview

The QSFP-100G-ER4L-S (ER4-Lite) compatible transceiver is an enterprise-grade 100G QSFP28 ER4 Optical Transceiver, optimized for high-capacity Data Center Interconnects (DCI) and metro networking. Utilizing advanced 1310nm LAN-WDM technology, it delivers a robust 40km reach over Single-Mode Fiber (SMF) with Duplex LC connector. Compliant with QSFP28 MSA, SFF-8636, IEEE 802.3bm, CAUI-4 and full DDM/DOM. this hot-swappable EML laser 100G QSFP28 ER4 Optical Transceiver is engineered for seamless "Plug-and-Play" integration into Cisco NX-OS and IOS-XE environments, providing a high-reliability, low-cost alternative to OEM optics without compromising signal integrity.It is ideal for 100G telecom links, data centers, high-performance computing networks, and enterprise core applications.

Key Technical Specifications

This factory-precision calibrated 100G QSFP28 ER4 Optical Transceiver features anti-thermal drift and anti-jitter signal optimization design, fully compliant with Cisco QSFP-100G-ER4L-S official hardware and firmware specifications. Supporting hot plug-and-play deployment in high-density cabinet environments, it provides zero-packet-loss 40km long-reach transmission for Cisco Nexus data center switches, Catalyst core switches and ISR series routers, meeting commercial-grade long-term aging stability and wide-temperature operating standards.

Cisco Compatible	QSFP-100G-ER4L-S	Vendor Name	HYTOPTODEVICE
Form Factor	QSFP28	Max Data Rate	103.125Gbps
Wavelength	4 x LAN WDM (1295、1300、1305、1310nm)	Max Distance	40KM
Connector	Duplex LC	Transmitter Type	4 x LAN WDM EML
Cable Type	SMF	Receiver Type	APD
TX Power	-2.9~+4.5dBm	Receiver Sensitivity	<-16.9dBm without FEC <-20.9dBm with FEC
Protocols	100G Ethernet, MSA Compliant	Power Consumption	< 4.5W

Full Compatibility List & Supported Network Hardware

1.Native Cisco Compatibility

Every HYTOPTODEVICE 100G QSFP28 ER4 Optical Transceiver undergoes 72-hour continuous high-traffic aging testing and real-machine verification on official Cisco IOS platforms. It achieves zero device recognition failure, no system alarm prompts and complete normal DDM data display on Cisco device management interfaces. It can directly replace the original Cisco QSFP-100G-ER4L-S module without extra command configuration modification, providing complete test reports and engineering acceptance documents for enterprise and operator network projects.

Compatible Cisco Device Series:

Cisco Nexus 9000 / 7000 / 3000 Series Data Center Core & Fabric Switches
Cisco Catalyst 9500 / 9300 Series Enterprise High-End Core Switches
Cisco ISR 4000 Series Integrated Service Routers & WAN Edge Devices
Cisco Cross-Room DCI Interconnection and Metropolitan Long-Haul Trunk 100G Ports

2.Multi-Brand Cross Compatibility

Compliant with global unified MSA and IEEE 802.3ba protocols, the 100G QSFP28 ER4 Optical Transceiver supports barrier-free optical interconnection with mainstream network devices worldwide. Custom EEPROM firmware coding solves exclusive vendor authentication limitations, ensuring stable operation in mixed-brand network environments. Verified compatible with Cisco, NVIDIA Mellanox, Arista, Juniper, HUAWEI, H3C and other mainstream network brands.

Primary Application Scenarios

The high-performance 100G QSFP28 ER4 Optical Transceiver is professionally optimized for 40km long-reach single-mode transmission scenarios, perfectly matching Cisco QSFP-100G-ER4L-S industrial specifications. With stable LAN-WDM wavelength transmission, low BER rate and strong anti-interference capability, this compatible optical transceiver is widely deployed in Cisco data center DCI interconnection, metropolitan backbone networking, cross-branch enterprise long-distance transmission and operator edge bandwidth expansion scenarios, meeting high-reliability and long-distance 100G optical transmission demands of various large-scale network architectures.

Bulk replacement and upgrade of aging Cisco QSFP-100G-ER4L-S modules for Cisco data center DCI long-distance interconnection
Metropolitan area network backbone construction adopting 100G QSFP28 ER4 Optical Transceiver to build 40km low-loss single-mode long-haul trunk links
Enterprise cross-city branch network interconnection deploying high-stability 100G QSFP28 ER4 Optical Transceiver for long-distance 100G bandwidth transmission
Operator edge room bandwidth expansion using low-BER 100G QSFP28 ER4 Optical Transceiver for medium and long-distance optical transmission
System integrator custom-coded 100G QSFP28 ER4 Optical Transceiver for multi-brand hybrid Cisco network integration projects
High-reliability industrial network transformation adopting temperature-resistant 100G QSFP28 ER4 Optical Transceiver for long-haul trunk link deployment

Connectivity Solutions(Applications)

1. 100G Switch-to-Switch Interconnection

Deploy paired HYTOPTODEVICE 100G QSFP28 ER4 Optical Transceiver with standard G.652 single-mode fiber to build stable 40km 100G switch-to-switch trunk links for Cisco Nexus and Catalyst platforms. This long-reach optical transceiver eliminates short-distance limitations of LR4 modules, supports low-jitter, low-BER cross-fabric and cross-room data center interconnection, and ensures reliable long-haul traffic transmission for Cisco core switching architecture.

2.100G Long-haul Switch Link with Structured Cabling

Perfectly adapted to standard enterprise structured cabling systems, the high-performance 100G QSFP28 ER4 Optical Transceiver supports 40km ultra-stable long-distance 100G transmission for Cisco enterprise and operator network environments. It solves the distance bottleneck of traditional short-range optical modules, realizes scalable cross-building and cross-branch high-speed optical interconnection, and maintains excellent signal integrity and anti-interference performance in complex structured cabling layouts.

Enterprise structured cabling long-distance transmission solution with 100G QSFP28 ER4 Optical Transceiver for Cisco cross-building 100G links

Features | 100G Connectivity for Data Center

Low-Power High-Density 100G QSFP28 ER4 Optical Transceiver for Fast Data Center Bandwidth Upgrade
Featured with 4.5W low-power consumption, high port density and ultra-high-speed transmission performance, the 100G QSFP28 ER4 Optical Transceiver provides a cost-effective and efficient deployment method for modern data center 100G network upgrades. It enables enterprises and operators to quickly ramp up stable 100G long-reach transmission capacity on existing Cisco switch infrastructure, effectively solving bandwidth bottlenecks and distance limitations of traditional 25G/40G network architectures. Hot-swappable plug-and-play design simplifies on-site installation, while low-power operation reduces overall data center PUE and long-term operating costs.

FAQ for 100G QSFP28 ER4 Optical Transceiver

Q1:What is QSFP28 100G ER4 module?
A:The 100G ER4 is a hot pluggable optical transceiver module.It is typically built in a QSFP28 form factor, uses a SMF to transmit distance up to 40km through 1310nm LAN-WDM technology.

Q2: Do I absolutely need an optical attenuator for short test runs with 100G QSFP28 ER4 Optical Transceiver?
A: Yes, an optical attenuator is mandatory for all short-distance test runs. ER4 modules adopt high-sensitivity APD receivers with ultra-high receiving gain. Direct short-distance connection without a 10dB–15dB fixed optical attenuator will cause optical power overload, resulting in permanent burnout of the module receiver, which damages the 100G QSFP28 ER4 Optical Transceiver and affects long-term Cisco network operation.

Q3:What fiber and connector does this 100g er4 module use?
A:The 100G ER4 module uses duplex LC connector with SMF.

Q4:Does the QSFP-100G-ER4L-S support real-time monitoring?
A:Yes, it supports Digital Optical Monitoring (DOM) for real-time monitoring of optical power,laser bias current,temperature and voltage.

Q5:What does "ER4" stand for in 100G ER4?
A: ER4 stands for "Extended Reach with 4-Channel". It uses 4 x LAN WDM (1295、1300、1305、1310nm) technology to transmit 100G traffic over SMF up to 40km.

Q6:Can I use this module with a single strand of fiber (Simplex)?
A: No.The 100G QSFP28 ER4 module requires two strands of single-mode fiber: one for transmitting (TX) and one for receiving (RX). you can not transmit data by a single strand of fiber.

Q7:Q: What are the technical differences between 100G ER4 vs 10G ER?
A: The difference as follow:

Feature	QSFP28 100G ER4 / ER4L	SFP+ 10G ER
Data Rate	100 Gbps	10 Gbps
Form Factor	QSFP28	SFP+
Max Reach	40km (ER4L requires FEC)	40km
Fiber Type	Single-Mode Fiber (SMF)	Single-Mode Fiber (SMF)
Wavelength	1310nm (LAN-WDM 4-lanes)	1550nm (Single-lane)
Connector	Duplex LC	Duplex LC
Power Consumption	~4.5W	~1.5W

Q8:Can I use this in an outdoor enclosure?
A: NO.the QSFP-100G-ER4L-S is for Commercial Temperature (C-Temp) rated for 0°C to 70°C. if you want to use it in outdoor enclosure. the Industrial Temperature (I-Temp) 100G ER4 module was recommended.

Q9:Can QSFP 100G QSFP28 ER4 module be linked with 10G SFP+ER?
A:NO, you can not connect 100G ER4 with 10G ER. Their speed is different(100G vs 10G), different wavelengths (1310nm vs 1550nm), and they operate different modulation techniques.

Q10: Does Cisco-compatible 100G QSFP28 ER4 Optical Transceiver require host FEC for full 40km transmission reach?
A: Yes. Most modern industrial-grade 100G QSFP28 ER4 Optical Transceiver rely on host-enabled RS-FEC (Clause 91) error correction mechanism to achieve the standard full 40km long-reach transmission distance. If RS-FEC is disabled on Cisco switch hosts, the effective stable transmission distance will drop to approximately 30km, failing to meet official ER4 long-haul deployment standards.

Q11: Will custom-coded 100G QSFP28 ER4 Optical Transceiver pass unsupported transceiver checks on Cisco and Juniper switches?
A: Standard generic modules cannot pass strict OEM hardware lock-in verification. HYTOPTODEVICE 100G QSFP28 ER4 Optical Transceiver supports professional third-party vendor-specific EEPROM coding customization, which can perfectly bypass strict authentication and unsupported transceiver checks of Cisco, Juniper and other mainstream switches, realizing plug-and-play deployment without system alarms.

Q12: Why does Cisco switch CLI display checksum error after inserting generic 100G QSFP28 ER4 Optical Transceiver?
A: The CLI checksum error is mainly caused by corrupted data or non-standard configuration in the module’s EEPROM coding, which is a common defect of inferior third-party modules. HYTOPTODEVICE 100G QSFP28 ER4 Optical Transceiver adopts dual verification EEPROM programming process to ensure complete and error-free firmware data, completely eliminating checksum error alarms on Cisco switching devices.

Brand & Service Advantage

HYTOPTODEVICE is a professional global supplier of high-compatibility long-reach optical transceivers, focusing on the R&D and bulk supply of Cisco QSFP-100G-ER4L-S compatible 100G QSFP28 ER4 Optical Transceiver. Every product undergoes strict optical parameter calibration, 72-hour high-low temperature cyclic aging testing, and real-machine interoperability verification on official Cisco IOS hardware platforms. We provide free sample testing, exclusive custom Cisco EEPROM coding, OEM private label customization, fast global logistics, and 5-year factory warranty service. Our compatible 100G QSFP28 ER4 Optical Transceiver helps enterprise users and system integrators reduce procurement costs by 60%–70% compared with original Cisco modules, while maintaining industrial-grade 40km long-distance transmission stability and full DDM diagnostic compatibility.

Why Network Engineers Choose HYTOPTODEVICE

HYTOPTODEVICE has supplied over 5000,000 optical transceiver modules to data centers, ISPs, and enterprise networks across 100+ countries since 2011. Every module undergoes a 72-hour burn-in test and full DDM/DOM validation before shipment.

Up to 70% cost savings vs OEM, transparent pricing & flexible bulk rates, supported quality returns
100% real-device compatible with Cisco, Huawei,Dell,Juniper, and Arista
ISO 9001:2015 Shenzhen factory, full lineup: 1.25G/10G/25G/40G/100G/200G/400G/800G/1.6T transceivers
Ample stock, fast global DHL/FedEx shipping in 3–5 working days
Free pre-sales engineering support for custom EEPROM & private label firmware
Real switch test videos available for pre-purchase review; inspection & shipping videos provided per order

“Phenomenal performance. We deployed 200 HYTOPTODEVICE SFP modules to replace Cisco OEMs in our backbone network. Result? Zero compatibility issues and a 60% reduction in costs. Highly recommended for mission-critical networks."— Senior Network Engineer, Regional Telecom, Australia

Quality Certification & Compliance

At HYTOPTODEVICE, our quality commitment is backed by industry-standard validations. From fiber optical transceiver manufacturing to final visual inspection, from IQC、IPQC、FQC to OQC, our processes ensure global compliance and reliability.

We adhere to rigorous standards for our SFP modules and network solutions:

ISO 9001: Certified quality management and production consistency.
CE & FCC: Fully compliant for seamless Global Market Access.
RoHS: Committed to environmental responsibility and hazardous material control.
Proven Reliability: Rigorous testing to reduce compliance risk and ensure safety.