Lightmatter Joins Open CPX MSA With Bidirectional Passage L20 Module

Lightmatter joined Open CPX MSA and released the Passage L20 CPX module, the first Open CPX module for AI infrastructure with bidirectional optics. It transmits 12.8 Tbit/s (6.4 Tbit/s each direction) and halves the number of fibers and connectors in AI scale-up networks.

• Throughput 12.8 Tbit/s: 6.4 Tbit/s transmit and receive
• 32 optical lanes per direction, 212.5 Gbit/s PAM4
• Range over 500 m over single-mode fiber, IEEE 802.3dj DR standard
• In a 512-GPU pod, saves ~15% interconnect cost and 200 miles of fiber