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From: koziarz@halibut.nosc.mil (Walter A. Koziarz)
Newsgroups: sci.electronics
Subject: Re: DTMF tones
Message-ID: <2552@nosc.NOSC.MIL>
Date: 25 Jul 90 17:48:59 GMT
References: <44900010@uxa.cso.uiuc.edu> <44900011@uxa.cso.uiuc.edu> <1202@gold.GVG.TEK.COM> <1990Jul25.125339.1665@focsys.uucp>
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Reply-To: koziarz@halibut.nosc.mil.UUCP (Walter A. Koziarz)
Organization: Naval Ocean Systems Center, San Diego
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X-Local-Date: 25 Jul 90 10:48:59 PDT

In article <1990Jul25.125339.1665@focsys.uucp> brad@focsys.UUCP (Brad McCloy) writes:
>
>  I also came across some undocumented but supposedly valid tones.
>Anyone have an idea or care to guess what they do?
>Fo = 697Hz & 1633Hz
>F  = 770Hz & 1633Hz
>I  = 852Hz & 1633Hz
>P  = 941Hz & 1633Hz
>
>watmath!focsys!brad

No need to guess, these are 'special feature' keys on a U.S. Government
Automatic Voice Network (AUTOVON) dtmf phone instrument.

	FO -- 'FLASH OVERIDE'
	F  -- 'FLASH'
	I  -- 'IMMEDIATE'
	P  -- 'PRIORITY'

I don't know what they DO; only what they ARE.

Walt K.