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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