http://en.wikipedia.org/wiki/Special_information_tones Special information tones http://en.wikipedia.org/wiki/Special_information_tones special information tone http://en.wikipedia.org/wiki/Special_information_tones http://en.wikipedia.org/wiki/Special_information_tones http://en.wikipedia.org/wiki/Special_information_tones out of service http://en.wikipedia.org/wiki/Special_information_tones Special Information Tones (SIT) http://en.wikipedia.org/wiki/Special_information_tones Special Information Tone http://en.wikipedia.org/wiki/Special_information_tones http://en.wikipedia.org/wiki/Special_information_tones http://en.wikipedia.org/wiki/Special_information_tones Special Information Tones http://en.wikipedia.org/wiki/Special_information_tones SIT tones http://en.wikipedia.org/wiki/Special_information_tones http://en.wikipedia.org/wiki/Special_information_tones http://en.wikipedia.org/wiki/Special_information_tones http://en.wikipedia.org/wiki/Special_information_tones special information tone special information tone https://en.wikipedia.org/wiki/Special_information_tones