Re: DTMF

The only other use cases I've heard where a long tone would be useful are
- voicemail fast-forward
- far end camera control

In either case an upper bound of 10s or so should be reasonable.

On Thu, Dec 15, 2011 at 4:57 PM, Cullen Jennings <fluffy@cisco.com> wrote:

>
> Good point :-) Mostly the PSTN has some spirits that require weird
> rituals. But the normal use case driving very long tones is some calling
> card services allowed you to "break out" of the current call using a very
> long pound then start new call from the calling card IVR service. The
> longest of these I have seen work with a 3 second long #. I don't know of
> any use cases needing things longer than this. It's hard to imagine there
> will be lots of use cases needing something larger than this this because
> humans are impatient and hate holding down buttons for all that long.
>
>
> On Dec 16, 2011, at 3:20 , Justin Uberti wrote:
>
> > I myself have a hard time envisioning the need for a DTMF tone that
> lasts longer than a seance. But it might depend on the spirits you are
> trying to communicate with.
> >
> > On Thu, Dec 15, 2011 at 7:29 AM, Cullen Jennings <fluffy@cisco.com>
> wrote:
> >
> > On Dec 15, 2011, at 15:02 , Justin Uberti wrote:
> >
> > > and my DTMF API proposal at
> https://docs.google.com/a/google.com/document/d/1oqPfWoeq9mDAJKV8RStw-FVzln7HRO50gkFR0wiPjbk/edit?hl=en_US
> .
> >
> > What would be the use case for very DTMF longer than 3 seances. I'd like
> to avoid the cancel if possible yet at the same time avoid people having
> beeping played in ear for very long time if something goes wrong.
> >
>
>