Optech 1.6T DR8 OSFP (MMS4A00-XM): Features, Advantages, and Use Cases

As AI clusters move toward larger GPU counts and higher east-west bandwidth, 1.6T optics are becoming a practical next step for simplifying network tiers, reducing port pressure, and improving scalability in modern data center fabrics. Optech’s 1.6T DR8 OSFP module (MMS4A00-XM) is built for high-density switching and AI/HPC connectivity—balancing performance, power efficiency, and interoperability.

Product Overview

MMS4A00-XM is a hot-pluggable OSFP 1.6T DR8 optical transceiver designed for next-generation Ethernet/AI fabrics and large-scale training clusters. It supports 8×200G-PAM4 electrical lanes and converts them to parallel optical interfaces, enabling high throughput with flexible deployment—especially where 1.6T switch ports need to connect to 2×800G NICs.

Key Advantages

1) Higher Bandwidth, Fewer Modules

Moving to 1.6T reduces the number of optics required to deliver the same aggregate capacity, helping:

• increase front-panel bandwidth density
• lower cabling complexity per delivered Tbps
• simplify scaling in spine-leaf architectures

2) Power Efficiency and Density (SiPh + Advanced DSP)

MMS4A00-XM integrates:

• Built-in Broadcom 3nm DSP
• SiPh-based (Silicon Photonics) technology for lower power/cost and higher density
• Max power consumption: 25W (design target)

This combination is engineered for high-density switch platforms where thermals and rack power budgets are critical.

3) Practical Breakout for AI Server Connectivity

For many AI deployments, a common need is Switch (1.6T) → NIC (2×800G). This module is designed to support architectures such as:

• DGX GB300/B300 solution connectivity, enabling 1.6T to 2×800G NIC links
• streamlined upgrades from 800G fabrics toward 1.6T readiness

4) Interoperability Focus for NVIDIA Ecosystems

Optech positions MMS4A00-XM for deployment with NVIDIA Quantum-X800 switch environments (including air-cooled and liquid-cooled systems), with an emphasis on compatibility testing and stable operation in high-pressure AI fabrics.

Technical Highlights (Quick Spec Summary)

• Form Factor: OSFP (hot pluggable)
• Interface Type: 1.6T DR8
• Electrical: 8×200G-PAM4
• Optical: Dual 4×200G-PAM4 optical parallel (supports flexible breakout design)
• DSP: Broadcom 3nm DSP
• Power: up to 25W
• Monitoring: DDM support
• Compliance: OSFP MSA, IEEE 802.3dj, RoHS, Class 1 Laser Safety

Where MMS4A00-XM Is Used

1) AI Training Fabrics (Leaf–Spine)

In large GPU clusters, leaf-spine designs demand high port density and predictable latency. 1.6T optics help:

• reduce the number of physical links needed for the same bisection bandwidth
• simplify port planning as GPU counts scale upward
• keep the fabric upgrade path cleaner (800G → 1.6T)

2) 1.6T Switch to 2×800G NIC Connectivity

A highly practical scenario is connecting:

• 1.6T switch ports to 2×800G server NIC ports
  This improves utilization and supports incremental upgrades—especially when servers remain 800G while the fabric begins transitioning to 1.6T.

3) HPC and Machine Learning Clusters

For HPC/ML environments where job synchronization and data movement are continuous, MMS4A00-XM targets:

• dense compute rows
• high-throughput storage-to-GPU pipelines
• scalable training pods and multi-pod growth

4) Future-Ready Data Center Upgrades

Even if you don’t deploy 1.6T end-to-end on day one, introducing 1.6T-ready switching and optics can:

• reduce future forklift upgrades
• enable staged migration from 800G
• keep cabling and topology cleaner during expansion

Deployment Notes (Buyer Checklist)

• Thermals: Plan airflow and port adjacency—25W-class optics require disciplined cooling design.
• Fiber management: Parallel optics benefit from clean routing, labeled trunks, and strict end-face inspection/cleaning.
• Breakout planning: Confirm your switch/NIC breakout mode and port configuration early to avoid mismatched cabling and link mapping.
• Firmware/interop: In NVIDIA-centric fabrics, align switch/NIC firmware and optics qualification practices to minimize bring-up risk.

About Optech

Optech Technology Co. Ltd was founded in 2001 in Taipei, Taiwan. The company was created with a sole purpose, to provide a wide and high quality portfolio of optical products to a very demanding and fast evolving market.

To respond to the permanent increase of IP traffic, Optech portfolio is constantly growing. Since the beginning, the company has always been up to date with the latest innovations on the market. Today, we are proud to deliver a large selection of 25G SFP28, 40G QSFP+, 100G QSFP28, 200G QSFP56, 400G QSFP-DD, 800G QSFP-DD/ OSFP and 1.6T OSFP optical transceivers and cables.

Optech has a large portfolio of products which include optical transceivers, direct attach cables, active optical cables, loopback transceivers, media converters and fiber patch cords.

Through its large selection of optical products, that have a range of data speed from 155 Mbps to 800 Gbps and reach distances up to 120km, Optech products are suitable for various industries such as telecom, data centers as well as public and private networks.

Ordering Information

Part Number	Optech Part Number	Features	Note
1.6T DR8 OSFP	OPNR-SX5-13-CBN	1.6T OSFP DR8 single mode mode, 2XMTP/MPO-12 APC, 1310nm, 500M	Compatible with Nvidia MMS4A00-XM

For additional information about Optech 1.6T DR8 OSFP (MMS4A00-XM), or price inquiry, please contact us at sales@optech.com.tw