[Asterisk-Dev] INFO and Duration=250

[James Sizemore]

Doubling the value to 500 did not seem to effect the length of the
tone played at all....hmmmmm. Back to the drawing board for me.
Anyone know what this value is supposed to effect?

James Sizemore wrote:

> 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
>> ==============
>> _______________________________________________
>