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Tele-Communication (Telecom) Terms Glossary and Dictionary
RAI: Remote Alarm Indication
Remote Alarm Indication (RAI), also known as yellow alarm signal, is a signal transmitted in the outgoing direction when a terminal determines that it has lost the incoming signal. Receiving remote alarm indication (RAI) means the far-end equipment over the T1 line has a problem with the signal it is receiving from the upstream equipment.
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