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About: Dial tone     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Signal106791372, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: Thingbroadcasteryago:WikicatTelephonySignalsyago:Abstraction100002137yago:Communication100033020yago:Signal106791372 New Facet based on Instances of this Class

A dial tone is a telephony signal sent by a telephone exchange or private branch exchange (PBX) to a terminating device, such as a telephone, when an off-hook condition is detected. It indicates that the exchange is working and is ready to initiate a telephone call. The tone stops when the first dialed digit is recognized. If no digits are forthcoming, the partial dial procedure is invoked, often eliciting a special information tone and an intercept message, followed by the off-hook tone, requiring the caller to hang up and redial.