[SIPForum-discussion] different ptime for different codec

[siddharth sharma]

Hi Forum,

@Abinash,

Please find the call flow scenario

SS ---> SBC ----> SS---> MGW.

If I will segregrate "m=" lines, then in that case how priority of codecs
will be shared.

@Cesar,

Yes by default interval is 20ms. But it is different for every codec as
bandwidth utilisation is main factor to change ptime.

On Tue, May 24, 2011 at 4:54 AM, Cesar Fiestas <fiestas.cesar at gmail.com>wrote:

> Wait voice packets are sent in intervals of 20ms by default I personally
> don't see a way to speed up the process unless anyone have a better idea
> On May 23, 2011 6:39 PM, "siddharth sharma" <sid77sharma77 at gmail.com>
> wrote:
> > Hi Forum,
> >
> > I have one scenario here. In SDP, I have configured single "m=" line,
> with
> > different codec. below that I am having different a= lines, which
> explains
> > codec information.
> > for eg.
> > m=audio xxxx RTP/AVP 18 0 8 4
> > a=rtpmap:18 G729/8000
> > a=rtpmap:0 PCMU/8000
> > a=rtpmap:8 PCMA/8000
> > a=rtpmap:4 G723/1/8000
> > a=ptime:20ms
> >
> > when call will get answered with any codec, ptime will be taken as 20ms.
> > Every codec has their own ptime. So I want to configure different ptime
> for
> > different codec. I also need to configure different priority for
> different
> > codec in same SDP.
> >
> > Can somebody suggest how to configure SDP in this case?
> >
> > Regards,
> > Siddharth Sharma
>
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