CTC Wang Labs <0004248165@mcimail.com> (08/24/90)
Some time ago, there were several inqueries and comments concerning SIT tones (the do-da-dee tones) and their uses: In Digest dated 18 July, Kenny Crudup <lotus!kcrudup@uunet.uu.net> writes: > In article <9798@accuvax.nwu.edu> John Higdon <john@bovine.ati.com> > writes: > >Does this give anyone any ideas about saving money when checking your > >messages on your machine or voice mail? Oops, did I say that? > Don't worry. Beat you to it. What *I* need are frequencies.... > ($10 bucks says the mod ices this note....) > [Moderator's Note: You lose. I don't know what kind of 'frequencies' > you are seeking, but they all are of public record at the FCC. Could > you be more specific in your request, please? PT] I suspect that the following is what Kenny is looking for: Special Information Tones (SIT Codes) are used by some telephone companies for automating various reporting and network observation operations. They are special coded tone sequences transmitted at the beginning of network advisory recorded announcements. There are four sequences defined: Seq Symb Catagory Announcements 1 NC Trunk Blockage No Circuit, emergency. 2 IC Customer Irregularity Vacant Number, AIS, CENTREX Number Change and Non-Working Station, Access Code Not Dialed/Dialed in Error, Manual Intercept Operator. 3 VC Vacant Code Vacant Code. 4 RO Equipment Irregularity Reorder Announcement. The tone sequences are coded as follows: Seq First Tone/Duration Second Tone/Duration Third Tone/Duration 1 985.2 Hz / 380 msec 1428.5 Hz / 380 msec 1776.7 Hz / 380 msec 2 913.8 Hz / 274 msec 1370.6 Hz / 274 msec 1776.7 Hz / 380 msec 3 985.2 Hz / 380 msec 1370.6 Hz / 274 msec 1776.7 Hz / 380 msec 4 913.8 Hz / 274 msec 1428.5 Hz / 380 msec 1776.7 Hz / 380 msec Note that these tones are defined for 'advisory messages' and are not (usually) used for billing or supervisory purposes. P.S. Kenny: Did you ever pay off our esteemed Moderator?? dab Dave Bonney <bonney@office.wang.com> MCIMail: 422-4552