[asterisk-dev] SIP channel Indicate AST_CONTROL_FLASH support

[Kamanashis Roy Shuva]

Hi,

   I am expecting someone to discuss this who have at least a little
idea about sip actually.

On Dec 28, 2007 5:20 PM, Kamanashis Roy Shuva <kamanashisroy at gmail.com> wrote:
> Hi,
>
> Let me copy some code from chan_sip.c
>
> I am reading a function body
>
>  /*! \brief  Receive SIP INFO Message
> \note    Doesn't read the duration of the DTMF signal */
> static void handle_request_info(struct sip_pvt *p, struct sip_request *req)
>
> ....
> ....
>
>         if (event == 16) {
>             /* send a FLASH event */
>             struct ast_frame f = { AST_FRAME_CONTROL, AST_CONTROL_FLASH, };
>             ast_queue_frame(p->owner, &f);
>             if (sipdebug)
>                 ast_verbose("* DTMF-relay event received: FLASH\n");
>         } else {
>
> .....
> .....
>
> The above code surely works with info message where the message
> body consists of signal value. And that value is matched to 16. This
> is enough evidence that asterisk supports flash when it receives
> info message.
>
>
> On Dec 28, 2007 4:41 PM, Johansson Olle E <oej at edvina.net> wrote:
> >
> > 27 dec 2007 kl. 19.54 skrev Kamanashis Roy Shuva:
> >
> > > Hi,
> > >
> > > The patch is not successful adding this feature. I think there is more
> > > to be added. Or the patch should follow a good design. I mean I am not
> > > satisfied with this patch anyway.
> > >
> > > Here I have found the flash support for sip.
> > >
> > > http://www.voip-info.org/wiki/view/SIP+DTMF+Signalling
> > >
> > >
> > This page is describing RFC 2833 DTMF.
>
> I think you should have a better look. Please recheck ..
>
> >
> > > Again, asterisk can accept INFO dtmf flash .. I mean it is in the code
> > > that when there is
> > > a info message with "signal=16" it indicates flash.
> > >
> > > I hope we will be discussing this upto a solution.
> >
> > Cisco docs indicate that they only support hook flash in the RTP
> > stream. I have not seen any support
> > of hook flash in SIP INFO.
> >
> >
> > /O
> >
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>
>
>
> --
> -- Thanks
>
> Kamanashis Roy
>



-- 
-- Thanks

Kamanashis Roy