Optech Switch-Tested OSFP-800G-2xLR4 for NVIDIA Spectrum-4 and Quantum-2 Networks

Selecting an 800G optical transceiver requires more than comparing form factors and optical specifications. The module must be correctly recognized by the target switch, establish stable links, report accurate diagnostic information, and maintain reliable operation under real platform conditions.

Optech’s OSFP-800G-2xLR4 optical transceiver, positioned as a compatible solution for NVIDIA MMS4X90-NR, has been tested in an actual NVIDIA Spectrum-4 SN5600 switch environment.

The supplied photograph shows the Optech 800G module installed in an SN5600 switch with two duplex LC single-mode fiber connections. This practical platform validation gives customers greater confidence than a compatibility claim based only on datasheet comparison.

Designed for AI, HPC, cloud, and high-capacity data center networks, the Optech solution combines:

• 800Gb/s aggregate capacity
• Two independent 400G LR4 optical links
• Twin-port OSFP architecture
• Two duplex LC interfaces
• Single-mode fiber transmission
• Long-reach optical connectivity
• NVIDIA platform-oriented compatibility
• Taiwan manufacturing and TAA options

From Specification Matching to Actual Switch Validation

Many compatible optical modules are promoted based only on matching electrical lanes, wavelengths, connector types, and mechanical dimensions. However, these specifications alone do not confirm that a module will operate correctly in a real switching platform.

Optech therefore performs platform-oriented testing to verify practical interoperability.

For the OSFP-800G-2xLR4 product shown in the image, the validation environment includes the NVIDIA Spectrum-4 SN5600 Ethernet switch. The SN5600 provides 64 OSFP interfaces supporting speeds up to 800GbE and can be split into as many as 128 logical 400GbE ports.

The validation process can include:

• Module insertion and recognition
• Correct EEPROM identification
• CMIS management communication
• Link establishment
• Dual-port operation
• Optical transmit and receive power verification
• Temperature and voltage monitoring
• Alarm and warning status
• FEC and lane status
• Continuous link stability
• Compatibility with the selected switch firmware

This testing approach helps reduce deployment uncertainty and gives buyers stronger confidence before placing production orders.

What Is the MMS4X90-NR?

The NVIDIA MMS4X90-NR is an 800Gb/s twin-port OSFP transceiver containing two independent 400G LR4 optical engines. NVIDIA describes it as an 800Gb/s, 2xLR4, OSFP, 2xLC-LC, 1310nm single-mode transceiver with a reach of up to 10km. Its NVIDIA ordering number is 980-9IB70-00YL00.

The reference architecture includes:

Optech’s OSFP-800G-2xLR4 is developed around this application profile, providing two long-reach 400G links through one OSFP switch cage.

Two 400G LR4 Links from One OSFP Port

The most important feature of OSFP-800G-2xLR4 is its twin-port design.

Internally, the module contains two separate 400G LR4 optical engines. Each engine transmits 400Gb/s over four CWDM wavelengths through one duplex LC interface.

The complete module therefore provides:

• One 800G electrical connection to the switch
• Two independent 400G optical connections
• Four wavelengths per 400G optical engine
• Eight 100G PAM4 electrical lanes
• Two duplex LC fiber interfaces

NVIDIA describes the twin-port architecture as an important method for expanding both 400G NDR InfiniBand Quantum-2 and 400GbE Spectrum-4 Ethernet switch connectivity.

Why This Architecture Is Valuable

Using two 400G engines in one OSFP module provides several practical advantages:

Higher Port Density

One physical OSFP cage can provide two logical 400G optical links, allowing network architects to increase 400G connectivity without doubling the number of switch cages.

Independent Fiber Routing

The two duplex LC connections can be routed independently. Depending on switch configuration, they may connect to two separate destination ports or form part of an aggregated high-capacity link.

Familiar LC Infrastructure

Unlike DR4 parallel optics that typically use MPO connectors and multiple single-mode fibers, LR4 uses wavelength multiplexing over standard duplex single-mode fiber.

This can make OSFP-800G-2xLR4 particularly attractive for:

• Existing LC structured cabling
• Campus fiber infrastructure
• Cross-building connections
• Long-reach data center links
• Networks seeking lower fiber-count cabling

Tested on the NVIDIA Spectrum-4 SN5600

The NVIDIA SN5600 is a Spectrum-4-based 800GbE Ethernet switch designed for high-density spine and super-spine networking. NVIDIA lists 64 OSFP ports operating from 10G through 800G, with up to 64 native 800GbE ports or 128 logical 400GbE connections through port splitting.

The image supplied for this article shows the Optech module installed in an SN5600 switch. Two duplex LC fiber pairs are connected through the module’s twin optical interfaces.

This validation is especially meaningful for customers building:

• Spectrum-X Ethernet networks
• AI front-end or back-end fabrics
• 800G spine networks
• High-capacity storage fabrics
• Cloud data center backbones
• Inter-building switch links

What the SN5600 Test Demonstrates

A successful platform test can verify that the module is more than mechanically compatible. It confirms that the switch and transceiver can communicate and establish the intended optical link under the tested configuration.

Depending on the agreed test plan, Optech can verify:

• Switch recognition without unsupported-module errors
• Correct module and vendor information
• Stable link-up status
• Dual 400G channel operation
• Digital diagnostic monitoring
• Transmit and receive optical power
• Temperature and supply voltage
• Alarm reporting
• Link stability over an extended test period

Test reports and detailed qualification items can be discussed according to customer project requirements.

Application with NVIDIA Quantum-2 QM9700

The NVIDIA QM9700 is a managed Quantum-2 NDR InfiniBand switch. NVIDIA specifies 32 physical OSFP interfaces providing 64 NDR 400Gb/s InfiniBand ports and an aggregate bidirectional throughput of up to 51.2Tb/s.

The twin-port OSFP concept is relevant to both Spectrum-4 Ethernet and Quantum-2 InfiniBand systems. NVIDIA’s MMS4X90-NR application documentation specifically describes the architecture as supporting the expansion of 400GbE Spectrum-4 and NDR InfiniBand Quantum-2 connectivity.

However, customers should not assume that a module tested on an Ethernet SN5600 will automatically use the same configuration in a QM9700 InfiniBand environment.

The following items should be confirmed separately:

• Ethernet or InfiniBand module firmware
• Switch operating software
• EEPROM coding
• Port mode
• FEC configuration
• Lane mapping
• CMIS implementation
• Required cable and optical profile

The test shown in the supplied image is an SN5600 Spectrum-4 validation. QM9700 projects can be evaluated and configured according to the customer’s exact hardware, firmware, and protocol requirements.

NVIDIA Spectrum-4 vs NVIDIA Quantum-2

Although the SN5600 and QM9700 both use OSFP interfaces, they serve different networking architectures.

NVIDIA Spectrum-4 Switch

Spectrum-4 is NVIDIA’s Ethernet switching architecture. The SN5600 is designed for high-performance Ethernet applications and supports up to 64 native 800GbE connections.

Typical applications include:

• Spectrum-X Ethernet fabrics
• Cloud networking
• AI Ethernet
• Storage networks
• Spine and super-spine architectures
• Data center aggregation

NVIDIA Quantum-2 Switch

Quantum-2 is NVIDIA’s NDR InfiniBand switching architecture. The QM9700 provides 64 NDR 400Gb/s InfiniBand ports through 32 twin-port OSFP cages.

Typical applications include:

• GPU training clusters
• High-performance computing
• Scientific research
• Large-scale InfiniBand fabrics
• Low-latency storage
• Distributed AI workloads

Because the protocols and firmware profiles differ, platform-specific validation remains essential even when the optical form factor is similar.

Benefits of Optech OSFP-800G-2xLR4

1. Tested on an Actual NVIDIA Switch

The product has been installed and tested in an NVIDIA Spectrum-4 SN5600 environment, helping verify real platform recognition and link operation.

2. Compatible with the MMS4X90-NR Application Profile

The Optech module is designed around the NVIDIA MMS4X90-NR twin-port 800G 2xLR4 architecture, including two duplex LC connections and long-reach single-mode transmission.

3. Long-Reach 400G Connectivity

Each LR4 optical engine is intended for long-distance single-mode links. The NVIDIA reference module is specified for transmission up to 10km.

4. Efficient Use of Switch Ports

Two 400G links are provided from one OSFP cage, increasing logical port density and supporting flexible network topology design.

5. Standard Duplex LC Cabling

The use of two duplex LC interfaces makes the solution suitable for common single-mode structured cabling and reduces the fiber count compared with parallel-optics designs.

6. Compatibility-Focused Engineering

Optech can provide platform-specific coding, CMIS verification, diagnostics testing, and optical performance checks according to the target switch environment.

7. Taiwan Manufacturing

Optech provides Taiwan-based manufacturing, quality control, serial-number management, customized labeling, and technical support for international networking projects.

8. TAA Options Available

Taiwan is listed as a designated country under FAR 25.003. Optech can offer Taiwan-origin and TAA-compliant options for eligible configurations and procurement projects. Final TAA status depends on the product’s country of origin, manufacturing process, substantial transformation, and required contract documentation.

Recommended Application Scenarios

Long-Reach AI Ethernet Fabrics

Use OSFP-800G-2xLR4 for high-capacity links between SN5600 spine and super-spine switches where transmission distance exceeds common DR or FR applications.

Data Center Campus Connectivity

The module can connect network rooms or data center buildings using existing duplex LC single-mode fiber infrastructure.

Two Independent 400G Connections

One OSFP cage can provide two separate 400G optical links, improving port utilization and topology flexibility.

Cloud and Hyperscale Networks

High-density twin-port optics can help cloud operators increase logical link density while retaining the replaceability of pluggable optical modules.

Research and HPC Environments

For Quantum-2 QM9700 projects, Optech can evaluate the appropriate InfiniBand firmware and compatibility profile based on the customer’s configuration.

Ready for Qualification and Ordering

Optech’s OSFP-800G-2xLR4 is positioned for customers who need more than a generic compatible module.

The product combines:

• MMS4X90-NR-compatible architecture
• Actual SN5600 switch testing
• Two 400G LR4 optical engines
• Two duplex LC interfaces
• Long-reach single-mode connectivity
• Platform-specific technical support
• Taiwan manufacturing
• TAA options for eligible projects

Customers are welcome to contact Optech for:

• Sample orders
• Production quotations
• Lead-time confirmation
• SN5600 compatibility requirements
• QM9700 qualification discussions
• Firmware and EEPROM coding
• Optical test reports
• TAA and country-of-origin documentation
• Customized labels and serial numbers

Suggested SEO Structure

H1: Optech Switch-Tested OSFP-800G-2xLR4 for NVIDIA Spectrum-4 and Quantum-2 Networks
H2: From Specification Matching to Actual Switch Validation
H2: What Is the MMS4X90-NR?
H2: Two 400G LR4 Links from One OSFP Port
H2: Tested on the NVIDIA Spectrum-4 SN5600
H2: Application with NVIDIA Quantum-2 QM9700
H2: NVIDIA Spectrum-4 vs NVIDIA Quantum-2
H2: Benefits of Optech OSFP-800G-2xLR4
H2: Recommended Application Scenarios
H2: Ready for Qualification and Ordering
H2: FAQ

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• NVIDIA Spectrum-4 optical module
• QM9700 compatible optical module
• NVIDIA Quantum-2 transceiver
• 800G twin-port OSFP
• 2x400G LR4 transceiver
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FAQ

1. Has Optech’s OSFP-800G-2xLR4 been tested on an actual switch?

Yes. The product shown in the supplied image has been installed in an NVIDIA Spectrum-4 SN5600 switch test environment. The validation is intended to confirm practical module recognition, link establishment, diagnostic communication, and optical operation under the tested configuration.

2. Which NVIDIA product is the Optech module compatible with?

The Optech OSFP-800G-2xLR4 is positioned as a compatible solution for the NVIDIA MMS4X90-NR, an 800Gb/s twin-port OSFP module with two 400G LR4 optical engines and two duplex LC interfaces.

3. Does the module provide one 800G optical link or two 400G links?

The switch-side electrical interface provides an aggregate 800Gb/s connection. Optically, the module provides two independent 400G LR4 links.

4. What fiber connector does it use?

It uses two duplex LC connectors. Each connector carries one 400G LR4 optical connection.

5. What is the supported transmission distance?

The NVIDIA MMS4X90-NR reference specification lists transmission of up to 10km over single-mode fiber. Final supported reach for an Optech configuration should be confirmed from the corresponding product specification and link budget.

6. Is it compatible with the NVIDIA SN5600?

The Optech module has been tested in an SN5600 environment as shown in the supplied image. Compatibility remains associated with the tested switch firmware, port configuration, airflow, and module coding.

7. Can the product be used with the NVIDIA QM9700?

The twin-port 2xLR4 architecture is relevant to NVIDIA Quantum-2 and Spectrum-4 applications. However, QM9700 is an InfiniBand platform and may require a different firmware or EEPROM profile from the SN5600 Ethernet configuration. Customers should confirm their QM9700 version and software before ordering.

8. What performance items can Optech test?

Depending on the project, Optech can verify module recognition, link status, optical power, digital diagnostics, temperature, voltage, alarms, FEC behavior, lane operation, and link stability.

9. Is the Optech module TAA compliant?

TAA-compliant Taiwan-origin options are available for eligible projects. Taiwan is a designated country under FAR 25.003, but final compliance depends on the specific product’s manufacturing origin and applicable procurement requirements.

10. How can customers place an order?

Customers can contact Optech with the required switch model, firmware version, protocol, quantity, reach, labeling, and TAA requirements. Optech can then recommend the appropriate coding and product configuration before providing samples or a production quotation.

Conclusion

Optech’s OSFP-800G-2xLR4 provides a high-density long-reach solution for customers building advanced NVIDIA networking environments.

Rather than relying only on a datasheet comparison, Optech has tested the product in an actual NVIDIA Spectrum-4 SN5600 switch environment, helping verify its recognition, link operation, and platform interoperability.

With two 400G LR4 optical engines, dual duplex LC interfaces, long-reach single-mode connectivity, Taiwan manufacturing, and TAA options, the product is well suited for AI Ethernet, cloud, data center campus, and high-capacity switch interconnect projects.

Optech welcomes sample requests, qualification projects, and volume orders for OSFP-800G-2xLR4.