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Some telephones, depending on the brand and model, have the intercom function, which allows to begin communication by sending the signal. When the signal comes, the telephone set rings a signal different from the standard ring tone call. After that the telephone temporarily switches off from the telephone line and works as an intercom.
VcallWorld
VCallWorld, Telecom was formed for the expressed purpose of providing customer centric VoIP services. By customer centric we mean that our customers will get responsive service from the VCallWorld, team regardless of how significant or insignificant the
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