Abstract: In a telecommunications network, a system for applying messages or data to the customer lines of calling parties during the "ringback" period of telephone call set up. The messages are preferably applied between successive ringback tones during the ringback period and are terminated when the called party answers the call. Advertising messages, civic or company announcements, political messages, informational messages(e.g. news or weather), or other data can be transmitted on the telephone lines during what is otherwise essentially unused times when the line is already tied up.

Abstract: In a telecommunications network, a system for applying messages or data to the customer lines of calling parties during the "ringback" period of telephone call set up. The messages are preferably applied between successive ringback tones during the ringback period and are terminated when the called party answers the call. Advertising messages, civic or company announcements, political messages, informational messages (e.g. news or weather), or other data can be transmitted on the telephone lines during what is otherwise essentially unused times when the line is already tied up.