Quick Specs
| Item | Details |
|---|
| Product Name | QSFP-40G-LR4-S |
| Data Rate | 40Gbps |
| Form Factor | QSFP+ |
| Wavelength | 1310nm WDM |
| Fiber Type | Single-mode Fiber (SMF) |
| Connector | LC Duplex |
| Max Distance | 10km |
| Power Consumption | ≤3.5W |
| Operating Temperature | 0°C ~ 70°C |
| Protocol | IEEE 802.3ba 40GBASE-LR4 |
Technical Parameters
| Parameter | Specification |
|---|
| Standard | IEEE 802.3ba |
| Transmission Type | 4 × 10G WDM |
| Optical Wavelengths | 1271 / 1291 / 1311 / 1331 nm |
| Fiber Compatibility | G.652 Single-mode Fiber |
| Interface Type | LC Duplex |
| Digital Diagnostics | Supported (DOM/DDM) |
| Hot-Pluggable | Yes |
| Application Compatibility | Cisco switches and compatible QSFP+ platforms |
Product Overview
The Cisco QSFP-40G-LR4-S compatible QSFP+ transceiver is designed for high-speed 40Gbps optical communication over long distances up to 10km using single-mode fiber (SMF). It complies with IEEE 802.3ba standards and uses advanced WDM technology to transmit data across four independent 10G optical channels.
This module provides stable, efficient, and low-latency transmission for enterprise backbone networks, data center interconnect (DCI), and telecom aggregation systems.
With its LC duplex interface and low power consumption design, it ensures seamless integration into Cisco networking environments while maintaining high reliability and performance.
Key Features
- 40Gbps high-speed transmission performance
- Up to 10km transmission distance over SMF
- LC duplex interface for easy deployment
- Low power consumption and high stability
- Hot-swappable QSFP+ form factor
- Built-in DOM/DDM optical monitoring
- Fully compliant with IEEE 802.3ba standard
- Compatible with Cisco and multi-vendor platforms
Application Scenarios
- Data center interconnection (DCI)
- Enterprise core switching networks
- Metro Ethernet backbone
- High-speed aggregation networks
- Cloud infrastructure optical links
Product Comparison
| Feature | QSFP-40G-LR4-S | QSFP-40G-SR4 | QSFP-40G-ER4 |
|---|
| Fiber Type | Single-mode | Multimode | Single-mode |
| Connector | LC Duplex | MPO | LC Duplex |
| Distance | 10km | 100–150m | 40km |
| Wavelength | 1310nm | 850nm | 1310nm |
| Typical Use | Backbone networks | Short-range data centers | Long-haul telecom |
Conclusion:
- LR4: Best for enterprise backbone and metro links
- SR4: Best for short-distance data center connections
- ER4: Best for ultra-long-haul transmission
FAQ
1. What is the QSFP-40G-LR4-S used for?
It is used for 40Gbps long-distance optical transmission up to 10km in enterprise and data center networks.
2. What type of fiber does it require?
It requires single-mode fiber (SMF, G.652 standard) with LC duplex connectors.
3. Is it compatible with Cisco switches?
Yes, it is compatible with most Cisco QSFP+ 40G ports including Catalyst and Nexus series (depending on system configuration).
4. What is the difference between LR4 and SR4 modules?
LR4 supports single-mode fiber up to 10km, while SR4 supports multimode fiber up to 150m for short-range connections.
5. Does this module support DOM/DDM monitoring?
Yes, it supports real-time digital diagnostics monitoring for optical power, temperature, and performance status.
6. What warranty and support do you provide?
We offer:
- 1–3 year warranty (depending on order agreement)
- Strict compatibility testing before shipment
- 24/7 technical support
- Replacement or refund for DOA products
7. Can it work with non-Cisco equipment?
Yes, it is also compatible with most OEM switches that support QSFP+ LR4 standard modules.
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