[OpenSIPS-Users] Force rtpmap:101

[Mark Farmer]

Bump

Sorry all to ask again, I'm getting a bit confused now.

My trunk provider says that I need to reply 488 in order to change the
rtpmap:100 to 101.

I have seen posts about using transcode-telephone-event and
always-transcode (this one is not listed in the OpenSIPS doc for rtpengine)
and I can see there is an option to add a body part.

So I'm wondering if I should:

A. Use transcoding, although I don't understand how to get it to use
rtpmap: 101
B. Intercept the INVITE, strip out the unwanted rtpmap line and reply 488
after using rtpengine module to add a body part to specify rtpmap: 101
C. Something else?

Am I on the right track at all here?

Mark.


On Tue, 17 Nov 2020 at 11:57, Mark Farmer <farmorg at gmail.com> wrote:

> Hi everyone
>
> I am getting some INVITE's that are requesting a=rtpmap:100
> telephone-event/8000 and some other codecs too which is breaking DTMF.
>
> What I really need to do is to force a=rtpmap:101 telephone-event/8000 in
> the replies.
> Can anyone tell me how to do this please? I've been looking at the docs
> but I'm struggling with this one.
>
> I am using RTPEngine and OpenSIPS 3.0
>
> Many thanks!
> Mark.
>
>

-- 
Mark Farmer
farmorg at gmail.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opensips.org/pipermail/users/attachments/20201120/3e4c23cb/attachment.html>