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.
Our VoIP solutions are cost-effective, low-maintenance, and flexible enough to handle all voice and data networking for small business up to call centers of more than 5000 users.