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.
Telnovo Communications, Inc was founded in 2013 as a Premier IP communications Provider in the Philippines. Telnovo is a privately held service communications company which offers a broad range of innovative telecom services.