Definition of "out-of-band" []

• Out-of-band signaling describes signals that are sent between two parties or two devices that are sent via a path or method different from that of the primary communication between the two parties or devices. (adjective)
• Out-of-band communication or out-of-band identity verification involves a program or authentication system's challenge and response to a user via a method other than the primary means of accessing the software. For example, a web application might request verification of a user's identity by sending that user an IM, rather than by presenting a web form for username and password entry. (adjective)

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• "There 's a new technology called out-of-band authentication, which we will be launching in Hong Kong in a couple of months."
• "There are traffic shaping methods which can easily and fairly ration limited upstream connectivity among customers but the major ISPs have been loath to implement them preferring instead out-of-band fees and cutoffs."
• "The NAC Appliance can sit in-line or run out-of-band."