Description
The Cisco QSFP-100G-ER4L-S is a high-performance 100 Gigabit Ethernet ER4-Lite QSFP transceiver designed for long-range optical connectivity over single-mode fiber. Supporting transmission distances of up to 40 km with host Forward Error Correction (FEC), this module is ideal for data center interconnects, enterprise core networks, and service provider backbone deployments.
Operating over four CWDM wavelengths and using duplex LC connectors, the QSFP-100G-ER4L-S delivers reliable, standards-based interoperability with Cisco platforms and select 100GBASE-ER4 and LR4 optics. Its hot-swappable QSFP form factor allows for simplified upgrades and flexible network expansion while maintaining low power consumption and high link stability.
| Specification | Details |
|---|---|
| Brand | Cisco |
| Model | QSFP-100G-ER4L-S |
| Form Factor | QSFP28 |
| Data Rate | 100 Gigabit Ethernet |
| Optical Standard | 100G ER4-Lite |
| Maximum Reach | Up to 40 km (with host FEC) |
| Fiber Type | Single-Mode Fiber (SMF, G.652) |
| Connector Type | Duplex LC |
| Wavelength | 4 × CWDM (1295, 1300, 1304, 1309 nm) |
| Transmission Mode | CWDM |
| Power Consumption | Up to 4.5 W |
| Hot Swappable | Yes |
| Compatibility | Cisco 100G-capable switches and routers |
| Typical Use Case | Data center interconnect, metro and backbone networks |
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Return Policy (Short Summary)
We offer a 30-day return window for most unopened, factory-sealed items.
Returns must be authorized before shipping back and must include all original packaging and accessories. Opened or used items are not returnable unless defective.
Some products—such as custom orders, special-order items, audio gear, software, and LED video walls—are non-returnable. Non-defective returns may be subject to a 20–30% restocking fee, and customers are responsible for return shipping costs.
For damaged or incorrect items, please contact us immediately.
From Scope to Sign-Off
A structured delivery process designed to reduce risk and keep projects moving.
Plan
Discovery, site review, requirements gathering, and project alignment. We define scope, constraints, and success criteria before any design work begins.
- Discovery calls & stakeholder interviews
- On-site survey & infrastructure review
- Requirements & use-case documentation
- Project scope, timeline & milestone alignment
Engineer
System design, schematics, signal flow, BOM development, and documentation. Every project leaves this phase with a complete engineering package.
- AV system design & signal flow diagrams
- Equipment selection & BOM development
- Rack layout & control system design
- As-built documentation package
Deploy
Procurement, logistics, installation, programming, commissioning, and training. We own the delivery from first shipment to final handoff.
- Authorized procurement & logistics coordination
- Physical installation & cable management
- Control system programming & configuration
- Commissioning, testing & end-user training
Support
Monitoring, maintenance, lifecycle planning, and long-term service agreements. We stay engaged long after project close.
- 24/7 remote system monitoring
- Preventive & reactive maintenance
- Technology lifecycle & refresh planning
- Long-term service level agreements
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