Product Overview
The QSFP-40G-iSR4 is a high-performance 40G QSFP+ optical transceiver designed for short-range data center interconnect applications over multimode fiber (MMF). Operating at 850nm wavelength, it delivers reliable high-speed transmission up to 100 meters on OM3 fiber and 150 meters on OM4 fiber.
This module adopts a 4-channel parallel optical architecture through an MPO/MTP interface, combining four 10G channels into a single 40G link. It is widely deployed in cloud computing networks, enterprise core switching systems, and high-density data center environments where bandwidth efficiency and low latency are critical.
Figure 1 shows the front panel of QSFP-40G-iSR4.
Key Features
- QSFP+ hot-pluggable form factor
- 40GBASE-SR4 / iSR4 architecture
- 850nm VCSEL laser technology
- Up to 150m transmission on OM4 MMF
- MPO/MTP optical connector interface
- 4×10G parallel transmission lanes
- Low power consumption and stable performance
- Built-in Digital Diagnostic Monitoring (DDM/DOM)
- Compatible with Huawei, Cisco, Arista, D-e-l-l switches
Quick Specifications
| Parameter | Specification |
|---|
| Product Model | QSFP-40G-iSR4 |
| Form Factor | QSFP+ |
| Data Rate | 40Gbps |
| Wavelength | 850nm |
| Fiber Type | Multimode Fiber (MMF) |
| Maximum Distance | 100m (OM3), 150m (OM4) |
| Connector Type | MPO/MTP |
| Transmission Mode | 4×10G Parallel |
| DDM Support | Yes |
| Operating Temperature | 0°C to 70°C |
Application Scenarios
- Data center switch-to-switch connections
- High-performance computing (HPC) clusters
- Enterprise core and aggregation networks
- Cloud computing infrastructure backbones
- Storage and SAN high-speed interconnects
Compatibility
The QSFP-40G-iSR4 is designed for broad compatibility with major networking platforms, including:
- Huawei CloudEngine series switches
- Cisco Nexus and Catalyst 40G platforms
- Arista 40G data center switches
- D-e-l-l Networking 40G systems
Note: Compatibility may vary depending on device firmware and vendor coding restrictions. Please verify before deployment.
QSFP-40G-iSR4 vs QSFP-40G-SR4
| Feature | QSFP-40G-iSR4 | QSFP-40G-SR4 |
|---|
| Standard | Huawei optimized | IEEE standard |
| Distance | Up to 150m | Up to 100m |
| Use Case | Huawei ecosystems | Multi-vendor networks |
| Optimization | Enhanced stability | Broad compatibility |
QSFP-40G-iSR4 is optimized for Huawei environments, offering extended reach and improved stability, while SR4 is a universal IEEE-standard solution.
Installation Guidelines
- Use MPO/MTP 8-fiber or 12-fiber trunk cables
- Ensure correct polarity configuration (Type B recommended)
- Only use OM3 or OM4 multimode fiber
- Clean fiber connectors before installation
- Avoid bending fiber beyond minimum bend radius
FAQ
Q1: Is QSFP-40G-iSR4 compatible with Cisco switches?
Yes, it can work with many Cisco 40G QSFP+ ports. However, compatibility may depend on firmware restrictions and vendor coding policies.
Q2: What type of fiber is required?
This module requires OM3 or OM4 multimode fiber with MPO/MTP connectors.
Q3: What is the maximum transmission distance?
- OM3 fiber: up to 100 meters
- OM4 fiber: up to 150 meters
Q4: Does this module support DOM/DDM monitoring?
Yes, it supports full digital diagnostic monitoring for real-time performance tracking.
Q5: What is the difference between iSR4 and SR4?
iSR4 is a Huawei-optimized version with improved reach and stability, while SR4 follows IEEE standards for broader multi-vendor compatibility.
Q6: Can this module support breakout connections?
Yes, it supports 4×10G breakout configurations using MPO breakout cables.
Q7: What warranty do you provide?
We provide a 1-year warranty with replacement support and professional technical assistance.
Why Choose Us
- 100% tested before shipment
- Strict compatibility verification process
- Fast global delivery
- OEM/ODM customization available
- Professional technical support team
- Competitive wholesale pricing
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