Translations:How to operate relay line block equipment/87/en
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If a train is now to be let into the opposite track, the corresponding "NO" button for the left track must be operated. As long as the "NO" operation is active, the indicator next to the button lights up white. If a replace signal (Sz) on the station side is operated while the "NO" indicator is lit, the opposite track indicator W24 is also switched on.