Have you tried listening to the analog side of the Primus line with a
regular telephone?  I assume you're using a Primus provided ATA since you
mention the TDM400.  Sometimes systems use what I've heard termed "DTMF
Clamping".  They listen for a tone and then interrupt the audio stream and
replace it with their own, usually of a fixed duration.  Perhaps you're
getting the first fraction of a tone, then the clamping kicks in and plays a
full tone.

An easy way to check for this DTMF clamping is to hold down the key.  If you
hold the key for 10 seconds and what comes out at the other end is a 1
second tone, then something in the middle is replacing your tone.

Also consider that if the audio is choppy, the tone may come through
partially, then drop out due to packet loss or jitter or whatever then come
back and be heard some more.  This may cause the tone to be detected as
though a key were pressed twice.  I've had this on my cel phone when the
connection quality is poor.

As for relaxDTMF, I'd think that you want it tightened, not relaxed.  You're
not failing to detect DTMF, you're detecting it too quickly or sensitively.

These are just a few thoughts.  I can't say I've experienced your problem
first hand.

Good Luck
Dave

On 3/29/06, Martin Glazer <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> Thanks for the all suggestions on wireless SIP phones, but now I have a
> more
> pressing problem.
>
> I've just setup a small Asterisk server which is connected to a Primus
> Voip
> line (as a regular PSTN line) going into a Digium FXO card (TDM400P). I am
> having a number of issues with the Primus line and was wondering if anyone
> had come across this previously or could recommend a solution, besides
> getting rid of the Primus line :-(
>
> - on an incoming call DTMF tones on the Primus line are doubled (ie, press
> 1
> and I see in the Asterisk logs that 1 and then 1 was pressed). Not all
> digits
> are doubled. This obviously causes problems with the IVR and attempting to
> get to particular extensions.
>
> I have tried adding relaxdtmf=yes in my zapata.conf file, but this makes
> no
> difference.
>
> Thanks
>
> Martin
>
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--
David Donovan
Consultant
Fulcrum Solutions

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