Hello Bogdan.

 

Whatever fits you better.

 

Antonis

 

From: Users <[email protected]> On Behalf Of Bogdan-Andrei Iancu
Sent: Δευτέρα, 24 Νοεμβρίου 2025 09:31
To: [email protected]; OpenSIPS users mailling list 
<[email protected]>; Giovanni Maruzzelli <[email protected]>
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 <[email protected] 
<mailto:[email protected]> > 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 <[email protected] 
<mailto:[email protected]> >:

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 <[email protected] 
<mailto:[email protected]> > Im Auftrag von Johan De Clercq
Gesendet: Donnerstag, 13. November 2025 16:29
An: [email protected] <mailto:[email protected]> ; OpenSIPS users 
mailling list <[email protected] <mailto:[email protected]> >
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 <[email protected] 
<mailto:[email protected]> >:

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

 

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