breakout box(redirected from Breakout dongle)
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breakout box[′brāk‚au̇t ‚bäks]
A device connected to a multiconductor cable that provides terminal connections to test the signals in a transmission.
breakout boxA device inserted into a multiple-line cable for testing purposes that provides an external connecting point to each wire. A small LED may be attached to each line, which glows when a signal is present.