Peter Svensson wrote:
On Tue, 21 Jun 2005, Leandro Morgado wrote:
Steve Underwood wrote:
Robert Rozman wrote:
I'm getting unreliable dtmf recognition (it works fine for 4-5
digits, errors (duplicates) on more), when transferred inband from
gsm gateway to NT port of quadbri under bristuffed Asterisk.....
We get these quite often. If there is any line noise asterisk will
interpret it as the end of a digit and then detect the same digit again.
We are connected to the pstn via isdn. The problem is with calls where the
dtmf tones are a bit unclean, i.e. too much energy is in the overtones.
Clean dtmf tones seem to be much more resistant to line noise.
Out other systems are more accepting of slightly off-spec dtmf tones.
People often make claims like this, but never seem able to back them up.
They usually turn out to be a wildy set receive gain, wrong codecs, or
something equally screwed up. Can you quote chapter and verse for a real
problem?
The DTMF detector in * is one of the most robust around.
Regards,
Steve
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