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calling line identification on call waiting (CIDCW)

CallingLine Identification on Call Waiting (CIDCW) is an ISDN service feature that combines two other service features: Calling Line Identification (CLI) and Call Waiting (CW). With Calling Line Identification on Call Waiting, a knock tone sounds during the call, signaling to the caller that another call is in the waiting to be answered queue. At the same time as the signal tone, the caller's number appears in the display. The called party can switch from the current call to the incoming call by toggling.

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Englisch: calling line identification on call waiting - CIDCW
Updated at: 27.05.2015
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