In computer technology and telecommunication, online and offline are defined by Federal Standard 1037C. They are states or conditions of a "device or equipment" or of a "functional unit". To be considered online, one of the following must apply to a device:
* Under the direct control of another device
* Under the direct control of the system with which it is associated
* Available for immediate use on demand by the system without human intervention
* Connected to a system, and is in operation
* Functional and ready for service
In contrast, a device that is offline meets none of these criteria (e.g., its main power source is disconnected or turned off, or it is off-power).
* Under the direct control of another device
* Under the direct control of the system with which it is associated
* Available for immediate use on demand by the system without human intervention
* Connected to a system, and is in operation
* Functional and ready for service
In contrast, a device that is offline meets none of these criteria (e.g., its main power source is disconnected or turned off, or it is off-power).
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