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.
Effringo provides you with a highly qualified team with vast experience in the telecommunications market and IT industry who are capable of providing you with a solution to help you add speech to your existing product portfolio.