Path: utzoo!attcan!uunet!wuarchive!zaphod.mps.ohio-state.edu!swrinde!ucsd!ucbvax!hplabs!hpcc05!col!kenw
From: kenw@col.hp.com (Ken Wyatt)
Newsgroups: comp.sys.handhelds
Subject: Re: Dual tones for HP28S
Message-ID: <20820005@col.hp.com>
Date: 19 Oct 90 17:32:55 GMT
References: <1990Oct17.210043.19196@rodan.acs.syr.edu>
Organization: HP Colorado Springs Division
Lines: 13

The standard (Bell Labs) Touchtone codes are:

     Low Tone             High Tone
      (Hz)                   (Hz)
                 1209    1336    1477    1633

      697          1       2       3       A

      770          4       5       6       B

      852          7       8       9       C

      941          *       0       #       D