Touchtones (was Re: How can I restrict outgoing phone calls?)

Article View: sci.electronics

Article #614

#614

From: John Sparks
Date: Wed, 21 Jun 1989 17:46

25 lines
1298 bytes

<3237@kitty.UUCP>
Sender: 
Reply-To: sparks@corpane.UUCP (John Sparks)
Followup-To: 
Distribution: 
Organization: Corpane Industries, Inc.
Keywords: 

In article <3237@kitty.UUCP> larry@kitty.UUCP (Larry Lippman) writes:
>
>    The original DTMF dial design was an _extremely_ clever design
>which employed only one germanium transistor with a dual resonant tank
>circuit to simultaneously oscillate at two frequencies. 

A bit off the subject, but does anyone have a list of the frequencies of each
number on the keypad? Email would be fine, if only to cut down on multiple
postings. I will post the list later. 

Please help.
Thanx

-- 
John Sparks   |  {rutgers|uunet}!ukma!corpane!sparks | D.I.S.K. 24hrs 1200bps
|||||||||||||||          sparks@corpane.UUCP         | 502/968-5401 thru -5406  
I'm the person your mother warned you about.

Technical Details

Message-ID: <844@corpane.UUCP>

Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!att!mcdchg!ddsw1!corpane!sparks

References: <43afec9f.16321@apollo.COM> <25535@agate.BERKELEY.EDU>

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!att!mcdchg!ddsw1!corpane!sparks
From: sparks@corpane.UUCP (John Sparks)
Newsgroups: sci.electronics
Subject: Touchtones (was Re: How can I restrict outgoing phone calls?)
Message-ID: <844@corpane.UUCP>
Date: 21 Jun 89 17:46:33 GMT
References: <43afec9f.16321@apollo.COM> <25535@agate.BERKELEY.EDU>
Organization: Corpane Industries Inc., Louisville, KY
Lines: 25

Reply to Parent Message