Question
Which telegrams does a line or backbone coupler forward across the lines it connects?
Answer
A — Only line-crossing telegrams whose group address is in its filter table.
Correct: couplers route only line-crossing telegrams, i.e. those whose group address is in the filter table; each line works independently.
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An error or unclear wording? Report this questionAll proposed choices (exam context)
- A.Only line-crossing telegrams whose group address is in its filter table.✓
- B.All telegrams it receives, unchanged.
- C.Only telegrams sent to individual addresses.
- D.None - a coupler only galvanically isolates the lines.
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