[OpenSIPS-Users] 100rel / PRACK Interworking

[Antonios Psaras]

Hello Bogdan.

 

Whatever fits you better.

 

Antonis

 

From: Users <users-bounces at lists.opensips.org> On Behalf Of Bogdan-Andrei Iancu
Sent: Δευτέρα, 24 Νοεμβρίου 2025 09:31
To: gmaruzz at opentelecom.it; OpenSIPS users mailling list <users at lists.opensips.org>; Giovanni Maruzzelli <gmaruzz at gmail.com>
Subject: Re: [OpenSIPS-Users] 100rel / PRACK Interworking

 

Hi Giovanni, Johan, Antonios,

Talking about the PRACK, yes, it sounds like a good idea to get such support in the dialog module. And yes, we need to start with drafting the functionality to be provided - should we do this over the #2076 github ticket (mentioned by Giovanni) or open new thread here, backed-up by a GH wiki page to aggregate the requirements ?

Best regards,



Bogdan-Andrei Iancu
 
OpenSIPS Founder and Developer
  https://www.opensips-solutions.com
  https://www.siphub.com

On 14.11.2025 11:30, Giovanni Maruzzelli wrote:

> It really is a mess, to me it seems that IMS guys are scared of rtp

+1 it is an endpoint thing, trunk providers are wrong to ask for it (what do they get from it?)

 

when you (trunk provider) know that the phone is actually ringing, what do you gain? It has meaning when you control the whole chain, end-to-end (carriers, IMS) not at all for deskphone->itsp->trunk->whatever->carrier->endphone

 

But I know they (trunk providers) start to *REQUIRE* PRACK

 

So, probably a module, or an extension of an existing module, can be warranted and welcome

 

Possibly on 3.6.X (that's the last LTS of the 3.0.0 series)

 

Let's open a thread on what functionalities can be useful in it?

 

-giovanni

 

 

On Fri, Nov 14, 2025 at 10:21 AM Johan De Clercq <Johan at democon.be <mailto:Johan at democon.be> > wrote:

+1.  I totally agree with you. 

It really is a mess, to me it seems that IMS guys are scared of rtp. 

 

Op vr 14 nov 2025 om 10:03 schreef Walter Schober <walter.schober at neotel.at <mailto:walter.schober at neotel.at> >:

Hi!

 

I also want to point out that its not done with PRACK handling alone. Followup (multiple) UPDATE with codec changes must be handled, too. Sometimes that lead into AMR(WB)/PCMA/G722/OPUS transcoding in early state. Including all the DTMF PT issues.

It is definitely a endpoint / softswitch feature. 

 

I know those ignorant IMS guys pushing out their internal mess to plain RFC3261 interconnects and forcing tasks previously done by an MSC to the rest of the world.

 

Br

Walter  

 

Von: Users <users-bounces at lists.opensips.org <mailto:users-bounces at lists.opensips.org> > Im Auftrag von Johan De Clercq
Gesendet: Donnerstag, 13. November 2025 16:29
An: gmaruzz at opentelecom.it <mailto:gmaruzz at opentelecom.it> ; OpenSIPS users mailling list <users at lists.opensips.org <mailto:users at lists.opensips.org> >
Betreff: Re: [OpenSIPS-Users] 100rel / PRACK Interworking

 

Giovanni on a side note, what to do with update ? do you handle it locally or do you forward it to your endpoint ? 

 

BR, Johan. 

 

Op do 13 nov 2025 om 15:54 schreef Giovanni Maruzzelli <gmaruzz at gmail.com <mailto:gmaruzz at gmail.com> >:

Antonio, you may want to update this feature request from Johan: https://github.com/OpenSIPS/opensips/issues/2076

 

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