[aprssig] DTMF encoding
bruninga at usna.edu
Wed Oct 1 10:58:07 CDT 2008
The D7 and D700 do not use pauses. When you change keys (in the
multi-press system), then that means you are moving on to the
next letter. If the next letter is on the same key, then you
press the right-shift button ("A" key) or the RIGHt Joystick
button. Now here is the amazing part. In the D710, kenwood
changed the right-shift function to the "C" key.
> I'm confused... about how using nnnn can
> actually get the right letter without programming
> pauses into the stream? For instance:
> 5554444337775 = KJ4ERJ or was that L4ERJ or JJJ4ERJ?
> Without a display to latch on the letter and move the cursor
> pause, the person driving the keyboard has no clue. Even
> this is the 'nixer, I suspect) without coding the pauses INTO
> THE DTMF
> STREAM, there's no way that I know of for the receiver to
> know what was
> actually entered.
> I was actually leaning in favor of this approach until he
> brought this
> up. Seems like the EchoLink folks might have something going
> with the
> statement that EVERY keystroke is 2 digits.
> 525140327351 = KJ4ERJ is deterministic at least. You could
> even extend
> it to cover lower-case should anyone really want to do such a
> 525140357654 = KJ4erj based on hitting the E key 5 times
> (DEFdef) and so
> forth (76=PQRpqr 54=JKLjkl)
> Lynn (D) - KJ4ERJ - Adding my $0.02 for whatever it's worth.
> PS. I really have trouble with the enter and pause with my
> last name.
> There's at least once voice response system out in IRS
> (Internal Revenue
> Service, the US tax guys) that requires me to touch tone the
> characters of my last name....
> DEFFE = 3...33...333...333...33# - Positively painful!
> jimlux wrote:
> > Bear in mind when talking about multiple key presses that
> most devices
> > that use this have some sort of visual feedback (e.g. an
> > display). I'd hate to have anything like this with no
> feedback. Hence
> > directory lookup interactive voice response systems that ask
> > enter the name using a single digit for each letter (using
> the 2=ABC
> > scheme).. Hopefully that "hashes" to a unique identifier
> that allows the
> > lookup to work. If not, they disambiguate by asking you "do
> you mean A
> > (press 1) or B (press 2)"
> > Jim, W6RMK
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