Question

A KNX TP device has a telegram ready, but a higher-priority telegram is currently on the bus. What happens?

KNX BasicLearnSystem OverviewMedium
Answer

A — It waits until the higher-priority telegram has finished, then tries to send again

Correct: A device blocked by a higher-priority telegram waits for it to finish and then retries.

All proposed choices (exam context)
  1. A.It waits until the higher-priority telegram has finished, then tries to send again✓
  2. B.It sends anyway, so the two telegrams mix on the bus
  3. C.The higher-priority telegram is aborted so the waiting device can send
  4. D.It discards its telegram permanently
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