[Freeswitch-users] DTMF issues/question

[Brian West]

On Sep 11, 2008, at 4:58 PM, Marc Lewis wrote:

>
> I've been having a problem getting DTMF passed through from registered
> phones to my termination provider.  Sometimes it works, sometimes it
> doesn't.  My provider is set for rfc2833.
>
> In looking through the mod_sofia.conf.xml file, and the sofia sources,
> it appears that the only two options for DTMF are info and rfc2833.
> I've tried various combinations and the only thing that ever seems to
> even sometimes work is if pass-rfc2833 is set to true.  I've tried  
> this
> with Linksys SPA 942 phones, Grandstream GXP 2000 phones and Cisco  
> 7940
> phones.  Doesn't seem to make a difference.  I've also tried various
> dtmf-durations and that didn't seem to have an effect either.
>
> However, after doing various searches it appears that not explicitly
> setting a dtmf-type in a sofia profile, it defaults to using inband  
> DTMF.

No that isn't the case.  We don't do anything inband by default.   
RFC2833 is our preferred method.

>
> Is this correct?  If inband DTMF is the default, then I will have my
> termination provider switch my account over to using inband instead of
> rfc2833.

Are you using the latest SVN or what code are you using?

>
>
> - Marc
>
> -- 
> Marc Lewis
> Avvatel Corporation
>
>
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Brian West
sip:brian at freeswitch.org