Welcome to our store！
100G QSFP28 LR4 Optical Transceiver – Compatible with Cisco QSFP-100G-LR4-S1. Product Overview
The 100G QSFP28 LR4 optical transceiver is a high-performance, cost-effective alternative to the Cisco QSFP-100G-LR4-S original module. It is fully compatible with Cisco switches and routers that support 100GBASE-LR4 standards.
Designed for long-range 100 Gigabit Ethernet applications over single-mode fiber (SMF) , this plug-and-play transceiver delivers reliable, stable performance – ideal for data center interconnects, campus backbone networks, metro networks, and remote site connectivity.
We also offer extended-reach and industrial-grade variants:
Please contact us for details on these variants.
2. Key FeaturesFeatureBenefit100% CompatibleFully compatible with Cisco QSFP-100G-LR4-S – tested on Cisco Nexus, Catalyst, and ASR series10km / 20km OptionsStandard 10km reach, with extended 20km industrial-grade version available for longer reach and extreme temperature environmentsPlug & PlayNo configuration required – install and goLow PowerTypical power consumption ≤ 3.5W – energy efficient for high-density deploymentsDDM/DOM SupportMonitor real-time temperature, voltage, and optical power via Cisco IOS/NX-OS commandsHot-SwappableReplace without powering down your switch – minimizes network disruptionsCost-EffectiveSignificant savings compared to OEM pricing, with same performance and reliability3. Technical BrandCisco SystemsCompatible Cisco Part NumberQSFP-100G-LR4-SForm FactorQSFP28Data Rate103.125 Gbps (4 × 25.78125 Gbps NRZ)StandardIEEE 802.3ba (100GBASE-LR4)Wavelengths4 × LAN-WDM (1295.56nm, 1300.05nm, 1304.58nm, 1309.14nm)Fiber TypeSingle-Mode Fiber (SMF, OS2, G.652/G.657)Connector TypeDuplex LCMax DistanceUp to 10km (6.2 miles)Transmit Power (per lane)-8.2 to +0.5 dBmReceive Sensitivity (per lane)≤ -14.4 dBmPower Budget6.2 dB typicalPower Consumption≤ 3.5W typicalDDM/DOMSupported – real-time monitoring of temperature, voltage, TX/RX power, bias currentHot-SwappableYesOperating Temperature0°C to 70°C (Commercial grade)Storage Temperature-40°C to 85°CStandards ComplianceIEEE 802.3ba (100GBASE-LR4), QSFP28 MSA (SFF-8665, SFF-8636), RoHS, CPRI, OTN4. Compatible Cisco Equipment
This module is designed to work with Cisco switches and routers that support QSFP28 ports and 100GBASE-LR4 standards:
Cisco Nexus Series:
Nexus 9000 series (9300, 9500, 9600)
Nexus 7000 series (with compatible line cards)
Nexus 3000 series (3132Q-V, 3164Q, 3172PQ, 3232C)
Cisco Catalyst Series:
Catalyst 9000 series (9200, 9300, 9400, 9500, 9600)
Catalyst 6800 series
Cisco ASR Series:
ASR 9000 series routers
ASR 9900 series routers
Cisco UCS Series:
Not sure if it fits your switch? Message us with your switch model – we'll confirm compatibility within 24 hours.
Important Note: Installing a third-party transceiver does not void your network equipment warranty. Cisco's warranty policy states that using third-party optics does not void the switch warranty, though Cisco TAC may require original optics for troubleshooting purposes.
5. Important NotesNoteDetailsFiber TypeRequires single-mode fiber (OS2, G.652/G.657, 9/125µm). Using multimode fiber will result in severe distance limitation.Port TypeRequires QSFP28 (100G) port. QSFP+ (40G) ports are not compatible with 100G modules.DistanceMaximum distance is 10km over standard single-mode fiber.FEC Requirement100GBASE-LR4 modules are designed to operate with or without FEC. RS-FEC (Reed-Solomon FEC) is optional but strongly recommended for optimal performance. Some Cisco platforms (e.g., Nexus 9000 series) may require FEC to be enabled for 100G operation – please refer to your switch documentation for specific requirements.DDM SupportDigital Diagnostics Monitoring (DDM/DOM) is supported and reports the transceiver's status to Cisco IOS/NX-OS.AuthenticityThis is a high-quality compatible module – not an original Cisco product, but fully tested to meet or exceed OEM specifications.Industrial Temperature VersionAlso available upon request: industrial temperature range (-40°C to 85°C) and extended distance (20km) variants. Please contact us for details.6. Variant Comparison (Cisco LR4 (Standard)10km0°C to 70°CEnterprise, data centerQSFP-100G-LR4-S-20-I20km-40°C to 85°CIndustrial, longer reach7. 100GBASE-LR4 vs Other 100G Distance10km70–100m2kmFiber TypeSingle-Mode (OS2)Multimode (OM3/OM4)Single-Mode (OS2)ConnectorDuplex LCMPO-12Duplex LCWavelengthsLAN-WDM (4λ)850nmCWDM4 (4λ)Typical ApplicationMetro / Campus / DCIIntra-rackData Center InterconnectCisco OEM Part 100G Module Comparison TableFeature100G PSM4 (GR4)100GBASE-CWDM4 (IR4)100GBASE-LR4100GBASE-DR4IEEE / MSA StandardPSM4 MSACWDM4 MSA802.3ba802.3cdMax Distance2 km2 km10 km500 mFiber TypeSingle-Mode (SMF)Single-Mode (SMF)Single-Mode (SMF)Single-Mode (SMF)Connector TypeMPO-12 (8 fibers / 4 pairs)Duplex LC (2 fibers / 1 pair)Duplex LC (2 fibers / 1 pair)Duplex LC (2 fibers / 1 pair)Core TechnologyParallel (4 lanes: 4x25G)CWDM (4 wavelengths)LAN-WDM (4 wavelengths, tighter spacing)Single-wavelength PAM4Wavelengths1310 nm (single)1271, 1291, 1311, 1331 nm~1295–1310 nm (tighter spacing)1310 nmFiber CountHigh (8 fibers / 4 pairs)Low (2 fibers / 1 pair)Low (2 fibers / 1 pair)Low (2 fibers / 1 pair)Relative CostLowMediumHighMediumBreakout Capable?Yes (1×100G to 4×25G)NoNoNoPower Quick Selection GuideRequirementRecommended ModelStandard data center / enterprise applicationsQSFP-100G-LR4-S (10km, 0°C to 70°C)Industrial / outdoor / extreme temperature environmentsQSFP-100G-LR4-S-20-I (20km, -40°C to 85°C)Short distance (within 100m)QSFP-100G-SR4-S (Multimode fiber)Medium distance (2km)QSFP-100G-CWDM4-S (Single-mode fiber)10. Broad Compatibility – Plug & Play!
Seamlessly works with all major networking brands – no complicated configuration needed! Compatible with:
Cisco · Arista · Juniper · Dell · Extreme · Netgear · Fortinet · Nokia · Allied Telesis · Broadcom · Marvell · Ciena · ADVA · Alcatel-Lucent Enterprise · Ubiquiti · MikroTik · Zyxel
11. Ideal Applications
✅ Data Center Interconnects (DCI)
✅ Long-Haul Enterprise Backbones
✅ Campus & Building-to-Building Links
✅ High-Density 100G Deployments
✅ Carrier & Service Provider Networks
✅ 100G Network Upgrades
12. Warranty, Returns & SupportPolicyDetailsReturns30-day returns – not satisfied? Contact usWarranty3-year warranty against functional defects (Lifetime warranty available on select brands)Thank you for your interest!
