[OpenSIPS-Users] OpenSIPS as Teams SBC RTP->SRTP Question

[John Quick]

I have written a couple of articles which, between them, should help you
with this question.
The first article looks at WebRTC <--> SIP using rtpengine:
https://kb.smartvox.co.uk/opensips/webrtc-using-opensips-and-rtpengine/
The other one discusses how you configure OpenSIPS 2.2.x for TLS:
https://kb.smartvox.co.uk/opensips/using-tls-in-opensips-v2-2-x/
..in the third paragraph it mentions about SRTP-RTP transcoding with a cross
reference to the first article and with a note about how to adjust the
parameters sent to rtpengine so they will work for SRTP (SAVP) instead of
WebRTC (SAVPF). So together it should provide you with the examples and
explanations you seek.

I have been working on setting up a Teams SBC over the last 2 weeks. I have
it working with calls in both directions and it is using rtpengine exactly
as described in my two articles.
Have you read the blog/knowledgebase article on the opensips web site about
Teams SBC?
https://blog.opensips.org/2019/09/16/opensips-as-ms-teams-sbc/

John Quick
Smartvox Limited
Web: www.smartvox.co.uk


>> I see that there is an rtpengine module for OpenSIPS but I could not find
a good example of how this could be used to encrypt the RTP packets as it
passes to teams?
>>
>> Anyone have a working example of this?  Or even better, something already
working with Teams?