Flexible, high-performance Active Electrical Cables for AI and cloud connectivity
Read more Switch-to-Switch
Enabling an “Active” plus “Smart” approach to higher-bandwidth Switch-to-Switch Ethernet interconnects
Read more 
Taurus Ethernet Smart Cable Modules™
Unleashing High Density AI Connectivity
- Extend 200/400/800G Ethernet signal reach for high-density AI racks using Active Electrical Cables
- Enhance signal integrity and bandwidth utilization for diverse AI topologies with thin and flexible cables
- Scalable across diverse systems using standard connector form factors with gearbox and breakout options
- COSMOS suite for performance optimization and seamless fleet management across dense AI platforms
Taurus Highlights
Optimizing Ethernet Connectivity for AI and Cloud
Extended Robust
Signal Reach
Over copper cables
Flexible Copper
Cables
Optimizing routing, service, and airflow
Enhanced Diagnostics
& Telemetry
Advanced capabilities through out-of-band management
Why Use Taurus Ethernet Smart Cable Modules?
Taurus enables robust, easy-to-design 100G/Lane Ethernet connectivity with high reliability and maximum uptime, featuring the COSMOS’ built-in suite for advanced fleet management, security, and deep diagnostics.
Robustness
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Extended Cable Line Rate
Future proof scalability for 200G/400G/800G
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Low Power
Uses 50% less power than Active Optical Cables
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Low Latency
Low latency operation at <50ns
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Security
Advanced security features help prevent malicious attacks of unauthorized firmware loading, module diagnostics access, and configurations
Easy System Design
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Thin Cable Gauge
Up to 34AWG
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Fewer Twinax Pairs
8 pairs at 200G/400G/800G reduces overall external diameter of cables
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Extended Reach
Up to 7m of reach
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Flexible Supply Chain
Taurus Smart Cable Modules are compatible with multiple cable vendors for easy second sourcing of active cable assembly
Fleet Management
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Quick Debug
Self-test features enable rapid troubleshooting
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Deep Diagnostics
Cable-side and host-side diagnostics enable easy management of entire fleets
Use Cases
Read more 
Read more Switch-to-Server
Enabling an “Active” plus “Smart” approach to higher-bandwidth Switch-to-Server Ethernet interconnects and Switch-to-NIC bandwidth utilization
Resources
Read more See COSMOS in Action at DesignCon 2025
See how live telemetry from Taurus Ethernet Smart Cable Modules via COSMOS provides real-time insights into network performance.
Read more OCP Global Summit Booth Tour
Take a 360 degree tour of Astera Labs’ booth at OCP Global Summit 2024.
Read more Rack-Scale Demo of Taurus Ethernet SCMs
Learn how Taurus Smart Cable Modules enable up to 100G/lane PAM4 for Switch-to-Server and Switch-to-Switch interconnect, at rack scale.
Read more Unprecedented Scale for AI Infrastructure: OCP 2023
Astera Labs’ PCIe®, CXL®, and Ethernet connectivity solutions deliver unprecedented reach, unprecedented memory capacity and bandwidth, and unprecedented…
Read more Three Things to Know about Astera Labs’ Taurus Ethernet Smart Cable Module Diagnostic Capabilities
By implementing effective fleet management and diagnostics capabilities, data center operators can minimize downtime and implement proactive measures to…
Read more Taurus Smart Cable Module™: “Active” + “Smart” 100G/Lane Ethernet Connectivity
Learn how Taurus Smart Cable Modules™ enable the hyperscale industry’s transition to 25G, 50G and 100G/Lane Ethernet for cost effective 200GbE, 400GbE…
Read more Taurus Smart Cable Modules™: An Active + Smart Approach to 200/400/800GbE
Today’s data center networks are primarily serviced by 25G/lane Ethernet technology; however, these networks are quickly moving to 50G and 100G/lane…
Ordering Information
| Orderable Part Number | Description | Max Data Gen | Cable Line Rate | Mode | Package / Connector | Ordering |
|---|---|---|---|---|---|---|
| EM400-QDX | 400G QSFP-DD Taurus Smart Cable Module | 400G | 50G/Lane, 100G/Lane | PAM4 | QSFP-DD | Contact Us, https://www.asteralabs.com/product-details/em400-qdx/ |
| EM400-EPS | 400G OSFP Taurus Smart Cable Module | 400G | 50G/Lane, 100G/Lane | PAM4 | OSFP | Contact Us, https://www.asteralabs.com/product-details/em400-eps/ |
| EM800-EPS | 800G OSFP Taurus Smart Cable Module | 800G | 100G/Lane | PAM4 | OSFP | Contact Us, https://www.asteralabs.com/product-details/em800-eps/ |
| EM800-QDX | 800G QSFP-DD Taurus Smart Cable Module | 800G | 100G/Lane | PAM4 | QSFP-DD | Contact Us, https://www.asteralabs.com/product-details/em800-qdx/ |
| EM200-QDX | 200G QSFP-DD Taurus Smart Cable Module | 200G | 25G/Lane | NRZ | QSFP-DD | Contact Us, https://www.asteralabs.com/product-details/em200-qdx/ |