[Freeswitch-users] Translating DTMF from RFC2833 to INFO

[Metik]

You previously stated that your Cisco gateway has some "bug" that 
prevents you from using RFC2833, did you enable "dtmf-relay rtp-nte" on 
the voip dial-peer that the call is using?

Unless you have configured the Cisco to support assymetric SDP or are 
using a non-default "rtp payload-type nte" setting that does not agree 
to well with FS's (default) "rfc2833-pt" setting, you should not have to 
use (SIP) INFO unless you want to.

I would recommend doing the following to ensure you are hitting the 
correct dial-peer and it is configured for RFC 2833 ("rtp-nte"):

command: show dialplan number [number] | i (dtmf-relay|DTMF Relay)

output:
        DTMF Relay = enabled,
        dtmf-relay = rtp-nte,

example:

show dialplan number 5551212 | i (dtmf-relay|DTMF Relay)
        DTMF Relay = enabled,
        dtmf-relay = rtp-nte,

Also, you can sift through "show sip-ua calls" for the call and ensure 
that the value of "Negotiated Dtmf-relay" is "rtp-nte". 

-metik


Yehavi Bourvine wrote:
> Hello Ognjen,
>  
>   From the tests I've done it is not so... When I set the profile to 
> use INFO, and a phone calls and asks for RFC2833 (phone-events in the 
> SDP) the FreeSwich ignores it (does not have phone-events field in the 
> reply SDP) which causes the phone to not send RFC2833 events...
>  
>                        Regards, __Yehavi:
>
> 2009/12/3 Ognjen Seslija <oseslija at gmail.com <mailto:oseslija at gmail.com>>
>
>     Bear in mind that FS will accept both 2833 and INFO in any profile
>     on an inbound call. Param "dtmf-type" is valid only for outbound
>     calls from the profile.
>
>     Ognjen
>
>     On Thu, Dec 3, 2009 at 6:11 AM, Yehavi Bourvine
>     <yehavi.bourvine at gmail.com <mailto:yehavi.bourvine at gmail.com>> wrote:
>
>         Hello,
>          
>           I have Polycom phones which send only RFC-2833 (or inband
>         which I dislike) and they should go out to the PSTN via a
>         Cisco gateway. The Cisco gateway has some bug and accepts only
>         INFO.
>          
>         I did a few tests:
>
>            *
>               Some of the phones are on different profile than the
>               Cisco. On their profile I set 'dtmf-type=rfc2833' and on
>               the Cisco's profile I set  'dtmf-type=info' and
>               Freeswitch did the translation. All works ok...
>            *
>               Some of the phones are on the same profile as the Cisco,
>               so I must set dtmf-type to rfc2833; it works with
>               internal applications (like voicemail) but does not work
>               through the Cisco as it misinterprets the rfc2833
>
>          
>         Is there a way to set some variable (or a parameter to the
>         bridge application) to do the translation?
>          
>                                      Thanks! __Yehavi:
>
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