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handoff(1) See Apple Handoff.
(2) To transfer from one function or system to another. For example, self-driving cars require a handoff from automatic to the human driver when a situation arises that it cannot figure out on its own.
(3) Switching a cellular phone call from one radio channel to another. Also called "handover," it mostly occurs when a mobile user travels into the range of an adjacent cell. However, when there is excessive interference on a radio channel, switching can occur within the same cell.
The handoff can be managed within the base station; the base station controller (BSC) that manages several base stations; or the mobile switching center (MSC) that sets up and tears down the calls. The switch typically takes place in about a quarter second so that the caller is unaware of it.
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The handover is the formal acceptance by the building owner that construction of the building is substantially complete and that it is ready for occupancy; that all systems have been installed correctly and are operational; and that a handover commissioning record has been completed and is available for the owner.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved