B&C Two Starlights are required - a TX to one CAI node and an RX from another.
The correction is four Starlights are required - a TX/RX pair at both ends providing bilateral OIO.
The correction is based on recollecting Lisa Thompson, ZACKs report of April 10, 2023: "Each accelerator Celestial AI sells has four POET chips. At $200 per chip, Celestial could represent $800 million in potential revenues by itself."