Specifications

Vendor

Astera Labs

Orderable Part Number

EM800-EPS

Series

Taurus Smart Cable Module

Max Data Rate

800G

Cable Line Rate

100G per lane

Modulation

PAM4

Package / Connector

OSFP

Function

Active retiming + link management inside the cable module

Compatibility

800GbE switch and NIC ports; OCP and IEEE 802.3 800G ecosystems

Managed By

Astera Labs COSMOS (link state, BER, eye metrics)

Ordering

Contact for lead time

Why the smart cable module exists

Passive copper DAC reaches roughly 2-3 metres at 800G. Beyond that, signal integrity collapses and the usual answer is optical: AOC or pluggable optics with their own retiming, power draw and failure modes. The Taurus Smart Cable Module takes a third path — it puts a retimer inside the cable assembly itself so the link is regenerated in-line, extending copper reach while keeping the host ports unchanged.

The "smart" half is the management plane. Because a Taurus module participates in the COSMOS stack, the host sees per-module link state, bit-error-rate history and eye-diagram metrics rather than treating the cable as an opaque passive part. In a large AI rack where a single flaky 800G link can stall a collective operation, being able to distinguish a cable problem from a NIC or switch-port problem without swapping hardware is the practical difference the module buys.

Astera Labs products are supplied by QS Compute with B2B pricing, global shipping and short sample lead times for AI data center, edge deployment and industrial integration projects.

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