Working an internal office or industrial intercom phone involves utilizing dedicated feature keys, line buttons, or soft-key menus designed for direct paging and station-to-station calling. To broadcast a message, users typically lift the handset or press the speakerphone button, enter the extension number of the target room or zone, and speak clearly into the microphone. Many modern digital intercom phones also feature auto-answer capabilities, hands-free speaker modes, and direct integration with facility security door release relays.