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.
Thanks to the high level experience of its managers and to the team of young and qualified engineers, CIT SA wants to place itself as a new reference in the world of innovative communications solutions providers.