Busy Tone needed for telephones to hang up: Revision history

1 June 2022

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23 May 2022

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11 January 2017

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17 September 2013

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18 November 2008

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17 November 2008

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12 November 2008

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• curprev 15:1415:14, 12 November 2008‎ Roarl talk contribs‎ 2,000 bytes +2,000‎ New page: ==Situation== In a building there are several elevators that uses telephone technology to communicate with people in the elevators. These telephones need a busy tone to disconnect automati...