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- Newsgroups: sci.electronics
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!torn!utzoo!henry
- From: henry@zoo.toronto.edu (Henry Spencer)
- Subject: Re: Tone frequencies on telephone
- Message-ID: <By3G5B.EsC@zoo.toronto.edu>
- Date: Sun, 22 Nov 1992 01:29:34 GMT
- References: <1992Nov17.075719.23612@riacs.edu> <1eg588INNs78@uniwa.uwa.edu.au> <1992Nov19.174629.2336@netcom.com>
- Organization: U of Toronto Zoology
- Lines: 11
-
- In article <1992Nov19.174629.2336@netcom.com> kehoe@netcom.com (Thomas David Kehoe) writes:
- >build a keypad with 0-9, #, *, and A-D. What you'd do
- >with the A-D keys I don't know...
-
- If memory serves, in some military phone systems they are used to indicate
- the priority of a call (so that two stock clerks arguing about who was
- responsible for losing a pair of boots get thrown off the line when NORAD
- calls to announce incoming missiles).
- --
- MS-DOS is the OS/360 of the 1980s. | Henry Spencer @ U of Toronto Zoology
- -Hal W. Hardenbergh (1985)| henry@zoo.toronto.edu utzoo!henry
-