How do I match a "D"? (Was: RE: [Asterisk-Users] In-band disconn ect problem (legacy PBX) - asterisk doesn't hear the touchtone?)

[Andrew Thompson]

Florian Overkamp wrote:
> Hi,
> 
> On Wed, 2005-02-09 at 09:53 -0700, Kevin P. Fleming wrote:
> 
>>They don't. Most phones (99.9%) don't have any way to generate DTMF A 
>>through D. There are test sets that do, and of course softphones could 
>>easily do so. These tones could also be generated by automated 
>>applications, although I don't know why one of them would be talking to 
>>Background() on an Asterisk server...
> 
> 
> Actually, A-D digits would be excellent to use instead of # and whatever
> for transfer. Having a separate code to do '#'-transfer without having
> to use any regular key on the phone would take away my objections to the
> entire process of '#'-transfers :)

I just have one problem with that. I have _never_ (that I know of) seen 
a phone with A-D on it!

-- 
Andrew Thompson
http://aktzero.com/
http://dev.asteriskdocs.org/