From the point of view of a user , the time during which a functional unit can be used. Note: From the point of view of operating and maintenance personnel, the available time is the same as the uptime , i.e., the time during which a functional unit is fully operational.
AVAILABLE TIME
Meaning of AVAILABLE TIME in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012