[asterisk-dev] [svn-commits] kpfleming: branch 1.4 r3490 - /branches/1.4/

[Kevin P. Fleming]

Steve Underwood wrote:

> Nice, but a nation by nation twist is slightly questionable. Applying 
> twist at the source only seems to be appropriate for analogue paths. The 
> way some countries specify it is kinda vague. A number of DTMF 
> generators have a 2dB twist locked into them, but they were only ever 
> intended for analogue connections. I would question whether a 2dB twist 
> should ever be applied over a digital path.

So what happens when that digital path becomes analog at the far end?
I'd be quite surprised if the far-end channel bank modified the audio to
achieve this.

In any case, I've only modified the zonedata for Brazil, because we've
gotten specific instructions from the regulatory agency there that there
must be 2dB twist whenever we generate DTMF. The rest of the zones are
still at -10/-10 (as they were before) and we'll only modify them when
we're really, really sure we should :-)

-- 
Kevin P. Fleming
Director of Software Technologies
Digium, Inc. - "The Genuine Asterisk Experience" (TM)