The Honeywell/Ball Optical Inter-Satellite Link (OISL) Communication Terminal is a modular, compact, and full-duplex laser communications system designed to meet the needs of large LEO and MEO constellations.

It is ITAR free and features an optical head unit (OHU), providing the free-space-to-fiber-optic interface, a transceiver for the optical to electrical interface, and controller electronics.