QSFP-40G-iSR4, Huawei QSFP+ Optical Transceiver, 40G Multi-mode/0.15km/850nm

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.

• 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

• 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

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 is optimized for Huawei environments, offering extended reach and improved stability, while SR4 is a universal IEEE-standard solution.

• 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

Yes, it can work with many Cisco 40G QSFP+ ports. However, compatibility may depend on firmware restrictions and vendor coding policies.

This module requires OM3 or OM4 multimode fiber with MPO/MTP connectors.

• OM3 fiber: up to 100 meters
• OM4 fiber: up to 150 meters

Yes, it supports full digital diagnostic monitoring for real-time performance tracking.

iSR4 is a Huawei-optimized version with improved reach and stability, while SR4 follows IEEE standards for broader multi-vendor compatibility.

Yes, it supports 4×10G breakout configurations using MPO breakout cables.

We provide a 1-year warranty with replacement support and professional technical assistance.

• 100% tested before shipment
• Strict compatibility verification process
• Fast global delivery
• OEM/ODM customization available
• Professional technical support team
• Competitive wholesale pricing