[OpenSIPS-Users] PRACK interworking requirements

[Giovanni Maruzzelli]

hello OpenSIPSers,

in previous mails has been noticed that various ITSPs are starting to
require PRACK support.

We know that PRACK belongs to endpoints, specifically phones and B2BUAs.

But...

There can be a use case where OpenSIPS will work as SBC (not necessarily
using the b2b module)

So, we can have a case where we would like to support that the dialogue
module insert the 100rel in the Supported: INVITE's header, and manage to
send a PRACK method to acknowledge provisional responses

If and when 100rel/PRACK are "generated" by OpenSIPS, they will be filtered
out (not propagated) to/from the endpoints, even if the endpoint would like
to support it

Reference RFC: https://www.ietf.org/rfc/rfc3262.txt

I believe this will be enough to make ITSPs happy.

Further developments can be moved to future.

Would be very very nice to have this feature backported to OpenSIPS 3.6,
being it the last of the 3.X series, and an LTS

Please let's gather here your thoughts , requests, corrections and
observations on this issue.

Have a nice Monday you all!

-giovanni

-- 
Sincerely,

Giovanni Maruzzelli
OpenTelecom.IT
cell: +39 347 266 56 18
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