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ring indicator (RI)

The Ring Indicator (RI) is a signal in parallel and serial interfaces such as the COM interface and RS-232

, which indicates the incoming call. The RI signal is located at pin 9 on the 9-pin Sub-D connector and at pin 22 on the 25-pin connector.

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Englisch: ring indicator - RI
Updated at: 04.06.2011
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Translations: DE