tenney@well.UUCP.UUCP (05/16/87)
I have the feeling this was asked and answered a long time ago, but
I can't recall the answer:
Is that 3-tone no-connection signal in-band? What would happen if my
answering machine started with such a tone sequence?
-- Glenn Tenney
UUCP: {hplabs,glacier,lll-crg,ihnp4!ptsfa}!well!tenney
ARPA: well!tenney@LLL-CRG.ARPA Delphi and MCI Mail: TENNEY
As Alphonso Bodoya would say... (tnx boulton)
Disclaimers? DISCLAIMERS!? I don' gotta show you no stinking DISCLAIMERS!dbb@aicchi.UUCP (05/22/87)
Well, those three tones, (Which used to be real loud, 0dB), are called SIT or Special Information Tones. They are used to help your local phone switch when you are connected to an intercept recorder. They tell your switch what to do about billing your call. However, once offhook supervision has been returned by the party you call, they have no effect. Therefore, you may use them on your answering machine and they will have no effect. Except Cuteness... Seriously, I doubt that a recorder could send those with enough purity to be heard by the PLL's that listen for them. -- -David B. (Ben) Burch Analysts International Corp. Chicago Branch (ihnp4!aicchi!dbb) "Argue for your limitations, and they are yours." - R. Bach