[asterisk-users] DTMF detection and Sangoma cards

[El Flynn]

Christopher Snell wrote:
> Hi,
> 
> I posted earlier about "Call parking breaks suddenly".  I believe that
> I have narrowed this down to a problem with DTMF detection and the
> Sangoma A101 card that we use.
> 
> Earlier, DTMF detection was not working at all.  Then, I set
> 'relaxdtmf=yes' in zapata.conf and it works...sort of.  When I call
> into the PBX from a digital desk phone, Asterisk is able to detect the
> agent's DTMF and parks the call as requested.   However, if I dial in
> from my cell phone, the agent's DTMF is not detected and the caller
> (me) hears the DTMF on the lines.
> 
> Does anybody have any ideas?
> 

We've been running a Sangoma A104 at a client site for the past 12 months 
without any DTMF issues whatsoever, neither from the inbound nor the outbound 
side. That unit's connected to a multitude of analog and IP phones, as well as a 
large legacy PABX behind the * box. Some numbers on the PRIs are provisioned to 
hit a lengthy IVR menu tree, so I know the DTMF works.

Bear in mind it's running much older versions of Asterisk, Zaptel and libpri.

Are you only having this problem for call parking? Any issues when the caller is 
navigating an IVR?

Flynn