[Asterisk-Dev] INFO and Duration=250

[James Sizemore]

I did a bit of searching around and found this class in chan_sip.c:
I am going to test the Duration at 500, and see how this effect
things. If anyone has already played with these values, and had any
bad gotchas please let me know.

==================
static int add_digit(struct sip_request *req, char digit)
{
        char tmp[256];
        int len;
        char clen[256];
        snprintf(tmp, sizeof(tmp), "Signal=%c\r\nDuration=250\r\n", digit);
        len = strlen(tmp);
        snprintf(clen, sizeof(clen), "%d", len);
        add_header(req, "Content-Type", "application/dtmf-relay");
        add_header(req, "Content-Length", clen);
        add_line(req, tmp);
        return 0;
}
==================


James Sizemore wrote:

> I have a gateway using a Digium card to convert a PRI
> call to a sip call then I transport the sip call to a Cisco
> IAD where it is converted back to a PRI. This all works
> well except DTMF is sent with a duration of .25sec.
> PRI specs says this should be .25sec to .5sec so this
> is with in spec, however the PBX on the other side of
> the IAD does not reliable work with the DTMF tones
> the minimum allowable length. I found in the INFO packets
> where the DTMF is set to a duration or 250, I would like
> to change this to 500.
>
> Which file and class would be the correct place to change
> this value at?
>
> ==============
> INFO packet options I would like to change
> ==============
> Content-Type: application/dtmf-relay
> Content-Length: 24
>
> Signal=5
> Duration=250
> ==============
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