Aiphone COMMUNICA TB-3F is a three-way telephone intercom system designed for clear and efficient communication in various settings. With its common talk and selective ring features, you can easily initiate calls and engage in conversations with specific individuals or groups within your system. The paging button allows for announcements and broadcasts to be made throughout the connected stations. The TB-3F supports up to three stations, making it suitable for small offices, homes, or other environments where reliable communication is essential.