Fiber-optic access supplied to an individual building for telephony, data communication, Internet or other network services. FTTB access typically terminates in a building basement, from which access for multiple end users is implemented through an in-building network.
Fiber To The Building or Fiber To The Business. An access network that runs over fiber optic cable all the way down to buildings. In a high rise building, there is usually a telecom room that contains fiber optic cable terminations for distribution by any type of cables to its tenants.