[Freeswitch-users] rfc2833 confusion

[Madovsky]

perfect. thanks !
  ----- Original Message ----- 
  From: Phillip Jones 
  To: freeswitch-users at lists.freeswitch.org 
  Sent: Thursday, May 06, 2010 1:43 PM
  Subject: Re: [Freeswitch-users] rfc2833 confusion


  http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_send_dtmf

  Don't get to hung up on the inband / out of band thing. This will be negotiated by FS and the carrier when the call is set up. For instance, when you use G729 you need out of band DTMF but for G711 you can use both. This might change from call you call, depending on what media gateways can handle.

  If you want to "see" and hear DTMF - fire up wireshark (or Tshark) and capture the trace. You can see the RTP DTMF in the trace and hear the clamped audio from the carrier perhaps. Or just hear the inband tones. It gives a good visual of what is going on.


  On Thu, May 6, 2010 at 1:25 PM, Madovsky <infos at madovsky.org> wrote:

    I anyone knows a link of a programming example of how
    to inject rfc2833 in RTP flow (doesn't matter the language)
    It would be very useful

    Thanks

    F
      ----- Original Message ----- 
      From: Madovsky 
      To: freeswitch-users at lists.freeswitch.org 
      Sent: Thursday, May 06, 2010 12:39 PM
      Subject: Re: [Freeswitch-users] rfc2833 confusion


      god, so many confusion for only an audio tone ! ;)
      anyway if I understand it's called inband by the fact that it's in RTP flow onlly.
      so the rfc2833 packet is only an event payload ...

        ----- Original Message ----- 
        From: Anthony Minessale 
        To: freeswitch-users at lists.freeswitch.org 
        Sent: Thursday, May 06, 2010 11:52 AM
        Subject: Re: [Freeswitch-users] rfc2833 confusion


        both 2833 and actual tones in the audio stream are often called in-band because the 2833 is just a transport for the inband tones that is assumed to be reconstructed on the other side.  Some people refer to inband as the real tones and 2833 as not inband because it's not the tones.  So the one you have to look out for is people who call 2833 inband and do not clarify that it's inband packetized according the RFC2833  


        The one that is not inband for sure is INFO (which has been dropped from the standard in favor of some ridiculous SUBSCRIBE based xml exchange) 


        Like all things in SIP and anything else that comes with an RFC even if you know the answer you can't rely on trusting that answer because the real world will do whatever it wants and invalidate you. =D




        On Thu, May 6, 2010 at 10:36 AM, Madovsky <infos at madovsky.org> wrote:

          HI,

          is rfc2833 inband or outband ? is it only event or mixed event and sound ?
          I'm confused after read articles on this subject

          Thx

          F

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