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Not to be confused with Out of bounds in programming languages; See Bounds checking.

Out-of-band is activity outside a defined telecommunications frequency band, or, metaphorically, outside some other kind of activity.


General usage[edit]

  • Out-of-band agreement, an agreement or understanding between the communicating parties that is not included in any message sent over the channel but which is relevant for the interpretation of such messages


  • Out-of-band signaling, the exchange of call control information in a separate band from the data or voice stream, or on an entirely separate, dedicated channel


  • Out-of-band data, in computer networking, a separate stream of data from the main data stream
  • Out-of-band management, in computer administration, system console access, even in the event of primary network subsystem failure
  • Out-of-band authentication, user authentication over a network or channel separate from the primary network or channel; used in multi-factor authentication
Out-of-band access refers to access via a dedicated management channel that is used for device maintenance purposes only.It is used at console method which is a physical management port that provides out-of-band access to a device.

See also[edit]