Richard Scobie [EMAIL PROTECTED] wrote:
> William R Sowerbutts wrote:
> > I have a TDM22B (TDM400 PCI + 2xFXO + 2xFXS). One FXO is connected to
> > the PSTN.
> >
> > When Asterisk places a call, it dials using DTMF. If I listen in on the
> > line during the dialing, there is a roughly one second pause between the
> > penultimate and the final digit -- proportionally much longer than the
> > pause between the preceeding digits. This accounts for about 25% of the
> > time taken to dial.
> >
> > Anyone know why this happens? I'd like to remove it.
> >
> As I understand it, the echotraining pulse is sent during during this
> pause, so removing echotraining from your conf. should fix it.
>
I was looking into this some time ago, while working out how to get
numbers to dial faster. I was able to send the DTMF tones faster
but, as the delay before the last digit is related to the echo
training, I decided that it was best to leave the delay in place.
Sending the other digits faster makes up for the pause to a certain
degree. To do this, edit the Zaptel driver's "digits.h" file and
change this line:
#define DEFAULT_DTMF_LENGTH 100 * 5
The default is 100 * 8. 3 works for me too, but 2 is too quick. I
thought it best to set it to 5, to allow some sort of a safety margin.
Your acceptable timing may vary, so you should experiment with it.
Find the lowest acceptable value and add 2 or 3.
Don't be tempted to mess with the PAUSE_LENGTH value, used by the 'w'
dial character. The 'w' is used by the last digit pause mechanism and
will therefore affect the echo training.
--
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