Point 2 Technology introduced its first 400GBASE-SR4 Active Electrical Cable (AEC) for use in Distributed Disaggregated Chassis (DDC) employed in data centers and high-performance computer (HPC) systems. The PT-QD20132 employs Point2’s C-Tube AEC and is built on a vertically-developed PAM4 SoC in a rugged cable assembly that delivers performance equivalent to active optical fiber cables (AOC) for rack and mid-tier interconnect.
Source: https://www.helpnetsecurity.com/2021/06/08/point-2-technology-aec/