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.
ZZ Telecommunications Inc.
ZZ is a well-established long distance telecommunications common carrier. ZZ`s strengths are derived from its ability to attract carriers of like interests through aggressively priced routes to difficult international countries and through its high qualit
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