• HYTOPTODEVICE Cisco QSFP-100G-LR-S compatible 100G QSFP28 single lambda 1310nm LR 10km OS2 SMF transceiver
  • HYTOPTODEVICE 100GBASE-LR PAM4 QSFP28 transceiver with KP4 FEC for Cisco 10km data center links
  • HYTOPTODEVICE zero alarm plug and play QSFP-100G-LR-S replacement 100G LR QSFP28 transceiver
  • HYTOPTODEVICE Cisco QSFP-100G-LR-S compatible 100G QSFP28 single lambda 1310nm LR 10km OS2 SMF transceiver
  • HYTOPTODEVICE 100GBASE-LR PAM4 QSFP28 transceiver with KP4 FEC for Cisco 10km data center links
  • HYTOPTODEVICE zero alarm plug and play QSFP-100G-LR-S replacement 100G LR QSFP28 transceiver

Cisco QSFP-100G-LR-S Compatible 100G QSFP28 Transceiver Single Lambda | LR 1310nm 10km Bulk Factory Wholesale | HYTOPTODEVICE

HYTOPTODEVICE Cisco QSFP-100G-LR-S compatible 100G QSFP28 transceiver, single-lambda 100GBASE-LR 1310nm PAM4 with KP4 FEC, 10km OS2 single-mode fiber. IEEE 802.3cd & 100G Lambda MSA compliant, pre-programmed EEPROM for zero-alarm deployment on Cisco switches, ideal for leaf-spine fabric and inter-building data center connections. Support bulk wholesale, private label and custom EEPROM coding available for global importers, distributors and integrators.
NO. Brand  Compatible P/N Remarks
1 Cisco  QSFP-100G-LR-S
2 Arista Networks QSFP-100G-LR
3 Intel  SPTSLP4SLCDF
4 Huawei   QSFP-100G-LR1 
5 Extreme  100G-LR-QSFP10KM 
6 Juniper  QSFP-100G-LR
7 Brocade  100G-QSFP28-LR-10KM
8 Dell  100G-QSFP28-LR
Description
Cisco QSFP-100G-LR-S Compatible 100G QSFP28 Transceiver Module Single Lambda | LR 1310nm  10km SMF Duplex LC | HYTOPTODEVICE

Product Overview

This 100G QSFP28 transceiver serves as a reliable, cost-effective drop-in replacement for the Cisco QSFP-100G-LR-S, engineered to integrate seamlessly with Cisco enterprise and data center switching platforms.

Powered by single-lambda 100G PAM4 technology and onboard KP4 FEC, it delivers robust 100G Ethernet connectivity over up to 10km of OS2 single-mode fiber (SMF). The integrated DSP converts four 25G NRZ electrical lanes into a single 100G optical wavelength, ensuring superior signal integrity and lower power consumption for campus backbones, inter-floor, and inter-building links.

Fully compliant with IEEE 802.3cd, QSFP28 MSA, and 100G Lambda MSA standards, the module supports real-time DDM/DOM optical monitoring. Pre-flashed with Cisco-compatible EEPROM, it enables seamless hot-swapping with zero system warnings—making it ideal for leaf-spine architectures, high-density aggregation trunks, and phased 100G-to-400G FR4 migration paths.

Key Technical Specifications

Cisco Compatible  QSFP-100G-LR-S Vendor Name HYTOPTODEVICE
Form Factor QSFP28 Max Data Rate 100Gbps Single Lambda
Wavelength 1310nm
Max Distance 10km
Connector Duplex LC/UPC Transmitter Type EML
Cable Type SMF Receiver Type PIN
FEC Support Yes TX Power -1.4~+4.5dBm
Power Consumption <4.5W Receiver Sensitivity < -4.5dBm
Protocols QSFP28 MSA, SFF-8636,IEEE 802.3cu,CAUI-4 Operation Temperature 0 to 70°C (32 to 158°F)


Usage Guidelines & Best Practices

  • Fiber Requirement: Only OS2 single-mode fiber; OM3/OM4 multimode fiber cannot support 1310nm PAM4 transmission and will cause link failure.
  • FEC Configuration: Enable KP4 FEC on Cisco switch ports to maximize 10km link margin and sustain low BER stability.
  • Installation Specification: Hot-plug supported; keep LC end faces clean and maintain proper bend radius to avoid extra attenuation.
  • Distance Limit: Rated for 10km OS2 SMF; excessive splices, contaminated connectors or tight bends reduce effective transmission distance.
  • Operating Environment: Commercial temperature 0°C–70°C; keep ports dry and dust-free to extend QSFP28 transceiver service life.

Full Compatibility List & Supported Network Hardware

1. Supported Hardware & Firmware
HYTOPTODEVICE QSFP-100G-LR-S compatible QSFP28 transceivers match original form factor and optical parameters. Pre-programmed Cisco-compatible EEPROM supports plug-and-play deployment on mainstream Cisco switching platforms. Every unit undergoes real-device validation to minimize unrecognized module alerts, negotiation drops and intermittent link instability.
Validated Cisco Platforms:
  • Cisco Nexus 9300, 9364C, 93180YC-EX leaf-spine data center switches
  • Cisco Catalyst 9500, 9600 high-density enterprise aggregation switches
  • Cisco Nexus 7700 modular core chassis switches
  • All Cisco devices with standard QSFP28 100GBASE-LR port profiles

2. Multi-Brand Cross Compatibility

Built on universal MSA specifications, these QSFP-100G-LR-S replacement QSFP28 transceivers support broad multi-vendor interoperability. They operate alongside Aruba, Huawei, Brocade, Dell, Juniper, H3C and NVIDIA/Mellanox equipment, simplifying hybrid fabric construction and long-distance interconnection for Cisco-based networks.

3. Free Value-Added Services

HYTOPTODEVICE provides free Cisco-specific EEPROM rewriting, private label customization and deployment consultation. All QSFP28 transceivers complete optical calibration, temperature cycling and 72-hour full-load aging before shipment. Bulk pricing helps reduce Cisco network CAPEX and recurring operational expenditure.

Primary Application Scenarios
  • 10km long-reach leaf-spine and inter-switch connections for Cisco data center fabrics
  • 100G high-bandwidth core and aggregation trunk expansion across campus buildings
  • 100G ToR switch uplinks for AI, HPC and virtualization server clusters
  • Inter-building, inter-floor and metropolitan medium-long distance 100G single-lambda fiber transmission
  • Phased 100G to 400G network migration via 400G FR4 breakout networking
  • Multi-vendor hybrid network deployment for Cisco cloud and enterprise infrastructure

Connectivity Solutions(Applications)


1. 100G to 100G for Switch-Switch Interconnection
This QSFP-100G-LR-S compatible QSFP28 transceiver extends core-to-aggregation trunk reach. It reuses existing OS2 single-mode fiber to deliver reliable 100G long-distance trunking without wholesale cable replacement

HYTOPTODEVICE 100G switch-switch interconnection 10km LR QSFP28 transceiver for Cisco core trunks

2.100G to 100G for Switch-NIC Connection

With rated 10km performance, the QSFP28 transceiver builds dependable long-range 100G uplinks between Cisco ToR switches and server NICs. Compact duplex LC cabling supports dense rack layouts, suited for HPC and AI clusters while reserving bandwidth headroom for future 400G upgrades.

HYTOPTODEVICE 100G switch-NIC uplink QSFP28 transceiver for Cisco server cluster connections

3.100G to 400G Smooth Network Migration

Supporting standard 400G FR4 breakout, our 100G LR QSFP28 transceivers enable mixed 100G/400G fabrics for Cisco data centers. Operators expand bandwidth incrementally while preserving existing switches and fiber, lowering maintenance downtime and renovation costs.

HYTOPTODEVICE 100G to 400G smooth network migration LR QSFP28 transceiver for Cisco data center upgrade


The Core Feature 

1.Phased upgrade without full infrastructure replacement

Single-lambda PAM4 design and standard KP4 FEC enable seamless 400G FR4 breakout migration. Customers scale bandwidth batch by batch while reusing Cisco switching and fiber assets, maximizing hardware utilization and cutting total TCO.

HYTOPTODEVICE 100G LR QSFP28 transceiver supports phased Cisco network upgrade without full infrastructure replacement



2.
Verified Host Interoperability

Pre-flashed Cisco-adapted EEPROM firmware; all HYTOPTODEVICE QSFP28 transceivers pass real-machine verification across Cisco generations. Zero-alarm plug-and-play recognition without link flapping, port lockdowns or compatibility errors on both legacy and newer hardware.
HYTOPTODEVICE QSFP-100G-LR-S compatible QSFP28 transceiver verified interoperability on Cisco switching platforms

3.Comprehensive Factory Testing & Reliable Performance

Every QSFP28 transceiver undergoes optical calibration, high-low temperature cycling and 72-hour full-rate aging before shipment. Power consumption ≤4.5W reduces switch thermal load and data center PUE, ensuring ultra-low BER and 24/7 reliable commercial operation.

HYTOPTODEVICE 100G LR QSFP28 transceiver comprehensive factory testing stable performance for Cisco networks



FAQ

Q1: What is a 100G Single Lambda LR 10km transceiver?
A1: HYTOPTODEVICE 100G Single Lambda LR QSFP28 transceiver transmits full 100G traffic over one 1310nm wavelength. It adopts PAM4 and KP4 FEC, supports 10km OS2 single-mode fiber, and delivers budget-friendly long-reach links for campus data center interconnections.

Q2:Why do 100G long-reach optics adopt QSFP28 instead of SFP28 packaging?
A2: SFP28 only supports 25G bandwidth, while HYTOPTODEVICE QSFP28 integrates four 25G lanes for native 100G. This form factor fits mainstream 100G switch ports and supports 400G-to-100G breakout without extra adapters.

Q3: Can 100G Single Lambda LR QSFP28 negotiate down to 40G operation?
A3: Stable 40G downgrade is not supported. Our 100G LR QSFP28 DSP and single-lambda PAM4 design are tuned exclusively for 100G; forced 40G configuration often causes intermittent packet loss and unreliable sessions.

Q4: Can 100G Single Lambda LR interoperate directly with legacy 100G LR4 modules?
A4: Direct optical interconnection fails. HYTOPTODEVICE single-lambda LR carries all data on one wavelength, while LR4 relies on four independent wavelengths. Their lane mapping and optical framing are incompatible; matching transceiver types on both ends is required.

Q5: Why does switch hardware show link up yet suffer heavy packet loss on 100G LR links?
A5: Link-up detection only identifies light presence, not usable signal quality. Common triggers include mismatched KP4 FEC modes, excessive fiber attenuation, dirty LC connectors, or receiver power hovering near sensitivity limits. Our QSFP28 modules include precise DDM to diagnose these conditions.

Q6. Why can Tx power be read while DDM shows zero Rx power on 100G LR QSFP28?
A6: This indicates one-way optical path failure. Check reversed patch cord Tx/Rx routing, broken fiber strands, scratched connector end faces, or faulty remote receiver. HYTOPTODEVICE modules support real-time DOM monitoring to speed up fault localization.

Q7:Is it feasible to run 100G Single Lambda LR beyond the rated 10km span?
A7: Production deployment past 10km is not advised. HYTOPTODEVICE 10km optical budget accounts for standard OS2 fiber and normal connector loss. Longer spans eliminate signal margin and create silent packet loss without immediate port-down alerts.

Q8:Does fully loading high-density switches with 100G LR QSFP28 create thermal risks?
A8: Each HYTOPTODEVICE QSFP28 consumes moderate power, but dense port populations accumulate heat. Blocked vents or poor front-to-back airflow raise module temperature, shrinking optical margin and shortening laser service life over sustained operation.

Q9:How does 100G Single Lambda LR reduce total cost compared with 100G LR4 transceivers?
A9: HYTOPTODEVICE 100G LR QSFP28 removes multi-wavelength combiner and splitter components. Simplified optical architecture cuts manufacturing and testing costs, delivering comparable 10km reach at lower unit pricing for leaf-spine and campus backbone builds.

Q10: Does the 10km distance rating of 100G LR QSFP28 include practical connector and splice loss?
A10: Published 10km ratings assume clean, properly seated LC connectors and minimal splices. Additional adapters, dirty end faces or excessive fusion splices add unexpected loss and reduce the usable distance of HYTOPTODEVICE 100G LR transceivers.

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.

Certified Quality. Global Standards. Guaranteed Performance.




Rigorous Industrial Product Testing

   hytoptodevice check device and equiptment for optical transceiver module

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  • HYTOPTODEVICE Cisco QSFP-100G-LR-S compatible 100G QSFP28 single lambda 1310nm LR 10km OS2 SMF transceiver
  • HYTOPTODEVICE 100GBASE-LR PAM4 QSFP28 transceiver with KP4 FEC for Cisco 10km data center links
  • HYTOPTODEVICE zero alarm plug and play QSFP-100G-LR-S replacement 100G LR QSFP28 transceiver

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