<page_title> Quindar tones </page_title> <section_title> Implementation of Quindar tones </section_title> <table> <cell> Quindar tones The "intro tone", a 250-millisecond tone at 2,525 hertz, followed by a 250 ms 2,475 Hz "outro tone". </cell> </table>
The "intro tone" was generated at 2,525 Hz.