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.
Founded in 1997, BBCOM is now well into its eighth year of providing converged data and voice services. Our managed growth has enabled us to become one of the rare technology companies that is currently profitable.