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

[Kevin P. Fleming]

Steven Critchfield wrote:

> I would suggest that that be added as a optional switch to background to
> get the extra digits. While I do not know if A-D are easy to hit with
> Talk-Off, it is 4 more potential digits to hit. Also it would be less
> surprise to a user to be required a flag to Background() to get those
> than it would be to diagnose why you occasionally get dumped in an
> invalid extension.

Unless I'm mistaken, if you don't have a "D" extension defined in the 
context, Background() is going to ignore the "D" keypress anyway.