ECFS (East Caribbean Fiber System) is a network of repeaterless fiber optic submarine communications cable that interconnects fourteen (14) eastern Caribbean islands. The cable is 1730 km (1075 mi) in length and runs from the British Virgin Islands to Trinidad in ten (10) segments. It was first installed in September 1995 and is scheduled to be upgraded by Xtera Communications as of April 25, 2013.
ECFS may refer to:
- East Caribbean Fibre System
- Electronic Case Filing System
- Ethical Culture Fieldston School (New York City)