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WCI QSFP-100G-LR4-S-WC 100GBASE-LR4 10km QSFP28 Transceiver
MPN: QSFP-100G-LR4-S-WC-CS
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Lifetime
Warranty
ISO 9001
Certified Testing
R2v3
Responsible Refurb
25+
Years
5K+
Customers
ISO
Certified
✓
Tested
Every WhaleyComm unit is professionally tested, reset to factory defaults, and certified by our in-house engineers — the same standard trusted by 5,000+ organisations across 25 years. Not a refurb marketplace. A certified lifecycle partner.
Enterprise-grade 100G long-reach optics. Broad platform compatibility. Backed by 25 years of enterprise trust.
The WCI QSFP-100G-LR4-S-WC is a 100GBASE-LR4 QSFP28 optical transceiver engineered as a high-performance, cost-effective alternative to OEM modules. Fully compliant with IEEE 802.3ba and the QSFP28 MSA standard, this module is professionally tested and reset to factory defaults before shipment, ensuring reliable performance from the moment it is installed. It is designed as a direct drop-in replacement for the Cisco QSFP-100G-LR4-S and is coded for compatibility with platforms from Cisco, Arista, Juniper, HPE, Aruba, and other leading vendors.The QSFP-100G-LR4-S-WC operates over single-mode fiber using four 25G LAN-WDM channels multiplexed across the 1310nm wavelength band and delivered through a duplex LC connector interface. This architecture supports link distances up to 10 kilometers, making it well suited for intra-campus runs, metro aggregation rings, and long-reach data center interconnects. The hot-swappable, low-power form factor integrates cleanly into high-density 100G switch and router deployments without requiring downtime for installation.
At $399, the WCI QSFP-100G-LR4-S-WC delivers the optical performance and interoperability of OEM-branded modules at a fraction of the cost. Every unit ships with WhaleyComm's Lifetime Warranty, giving your team the confidence to standardize on 100G long-reach connectivity across your infrastructure without compromise.
Technical Specifications
Data Rate
100 Gbps
Standard
100GBASE-LR4
Form Factor
QSFP28
Connector
LC Duplex
Fiber Type
Single-Mode Fiber (SMF)
Wavelength
1310nm LAN-WDM
Channel Architecture
4x25G
Maximum Reach
10km
Compliance
IEEE 802.3ba, QSFP28 MSA
Hot-Swappable
Yes
Ideal Use Cases
Data Center Spine-Leaf Fabrics
Provides reliable 100G long-reach connectivity between spine and leaf switches across large data center footprints, supporting distances that exceed the limits of short-reach optics.
Enterprise Core and Distribution Layers
Delivers the bandwidth and reach required to interconnect enterprise core and distribution switching layers across campus buildings or multi-floor deployments.
Metro and Service-Provider Aggregation
Supports aggregation links in metro and service-provider environments where 10km reach over single-mode fiber is a standard deployment requirement.
High-Density 100G Switch Uplinks
Hot-swappable and low-power by design, this module integrates efficiently into high-density QSFP28 chassis and fixed-configuration switches without adding thermal complexity.
Multi-Vendor Network Standardization
Compatible with platforms from Cisco, Arista, Juniper, HPE, and Aruba, enabling network teams to standardize on a single 100G long-reach optic across a heterogeneous infrastructure.
What's Included
WCI QSFP-100G-LR4-S-WC 100GBASE-LR4 QSFP28 Optical Transceiver
Dust Cap
Certificate of Testing
Lifetime Warranty — No Time Limits. No Questions.
Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it. We have stood behind our hardware for 25 years and 5,000+ customers — that is not a marketing line, it is our operating standard.
Compatibility Details
Review supported optics, cables, software, management protocols, and environment-specific compatibility guidance.
COMPATIBLE OPTICS & CABLES
✓
The WCI QSFP-100G-LR4-S-WC is engineered for broad multi-vendor interoperability and is designed as a coded-compatible replacement for the Cisco QSFP-100G-LR4-S.
✓
Compatible platforms include Cisco, Arista, Juniper, HPE, Aruba, Dell, and Extreme Networks switches and routers with QSFP28 port interfaces supporting 100GBASE-LR4.
For compatibility verification specific to your environment, contact our engineering team: +1 214 607-4800 or sales@whaleycomm.com
Shipping & Returns
Clear fulfilment, tracking, return, warranty, and support information for enterprise hardware orders.
Shipping
Orders typically ship within 1-2 business days after payment confirmation. Tracking details are shared once the order has been dispatched.
Returns
Eligible products can be returned according to WhaleyComm's return policy. For DOA, warranty, or product-related issues, contact the support team for replacement or resolution.
Frequently Asked Questions
Product-specific answers about compatibility, testing, warranty, fulfilment, and purchase confidence.
This module is engineered for broad interoperability and can be coded for Cisco, Arista, Juniper, HPE, Aruba, and additional platforms. It is designed as a direct compatible replacement for the Cisco QSFP-100G-LR4-S. Contact our engineering team at +1 214 607-4800 or sales@whaleycomm.com to confirm coding for your specific platform before ordering.
The QSFP-100G-LR4-S-WC requires single-mode fiber (SMF) and uses a duplex LC connector interface. It supports link distances up to 10 kilometers operating over four 25G LAN-WDM channels in the 1310nm wavelength band.
Yes. The QSFP-100G-LR4-S-WC supports Digital Optical Monitoring (DOM), allowing network management systems to report real-time optical performance data including transmit power, receive power, temperature, and supply voltage.
Yes. Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it at no cost — no time limits, no questions asked.
Every unit goes through our ISO 9001-certified testing process: full power-on diagnostics, port-by-port functionality testing, firmware verification, factory reset, and final inspection. A Certificate of Testing ships with every unit.
WCI QSFP-100G-LR4-S-WC 100GBASE-LR4 10km QSFP28 Transceiver
$85.00
WCI
WCI QSFP-100G-LR4-S-WC 100GBASE-LR4 10km QSFP28 Transceiver
MPN: QSFP-100G-LR4-S-WC-CS
$85.00
In Stock — Ships Same Day
