+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] >: > 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]> *Im Auftrag von *Johan De > Clercq > *Gesendet:* Donnerstag, 13. November 2025 16:29 > *An:* [email protected]; OpenSIPS users mailling list < > [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] > >: > > Antonio, you may want to update this feature request from Johan: > https://github.com/OpenSIPS/opensips/issues/2076 > > > > On Thu, Nov 13, 2025 at 3:48 PM Antonios Psaras <[email protected]> > wrote: > > Hello Giovanni > > > > I totally agree with you. PRACK is an endpoint feature. But as you know, > working with IMS, and having all kind or end point implementations of sip > stack you need to do the dirty job in the middle for interoperability > reasons. Commercial SBC have that feature called 100rel Interworking which > can be enabled per Trunk. Hence, if a carrier requires 100rel/PRACK > enforcement and the end point does not supporting it, the function is > engaged and handles the PRACK locally. > > > > I will check Bogdan suggestion but in the first read looks like a tmp work > around which I am not sure if that can be scaled to few hundreds of CPS > that we work with. > > > > As this is a feature that will be needed for VoLTE/5G/IMS networks my > suggestion is to create a module for that. > > > > Regards > > > > > > *From:* Giovanni Maruzzelli <[email protected]> > *Sent:* Πέμπτη, 13 Νοεμβρίου 2025 16:37 > *To:* [email protected]; OpenSIPS users mailling list < > [email protected]> > *Subject:* Re: [OpenSIPS-Users] 100rel / PRACK Interworking > > > > > > > > El 26/02/2024 a las 7:43 a. m., Bogdan-Andrei Iancu escribió: > > >* yes, you can use the b2b_logic (together with b2b_entities) for that, * > > >* but it may be a too heavy tool for the purpose. Maybe you can try to * > > >* generate the PRACK from OpenSIPS level by using the t_uac_dlg MI * > > >* function [1] via the mi_script module [2] - basically to trigger that * > > >* MI cmd from the onreply_route, when receiving the 180 reply.* > > > > > >* [1] https://opensips.org/html/docs/modules/3.4.x/tm.html#mi_t_uac_dlg > ><https://opensips.org/html/docs/modules/3.4.x/tm.html#mi_t_uac_dlg>* > > >* [2] https://opensips.org/html/docs/modules/3.4.x/mi_script.html#afunc_mi > ><https://opensips.org/html/docs/modules/3.4.x/mi_script.html#afunc_mi> * > > > > > > > > On Thu, Nov 13, 2025 at 3:34 PM Giovanni Maruzzelli <[email protected]> > wrote: > > > > > > eg: https://lists.opensips.org/pipermail/users/2024-March/047880.html > > > > > > > > On Thu, Nov 13, 2025 at 3:27 PM Giovanni Maruzzelli <[email protected]> > wrote: > > Hello Antonio, > > > > PRACK is actually an endpoint feature, at the proxy level you can only > fake it... > > > > -giovanni > > > > On Thu, Nov 13, 2025 at 3:14 PM Antonios Psaras <[email protected]> > wrote: > > Dear Team > > > > As many carriers requires 100rel for interoperability reason with IMS, the > need for 100rel interworking is mandatory. Is there any solution available > to implement that on OpenSIPs Proxy level? > > > > Regards > > > > Antonis Psaras > > > > > > _______________________________________________ > Users mailing list > [email protected] > http://lists.opensips.org/cgi-bin/mailman/listinfo/users > > > > > -- > > Sincerely, > > Giovanni Maruzzelli > OpenTelecom.IT > cell: +39 347 266 56 18 > > > > > -- > > Sincerely, > > Giovanni Maruzzelli > OpenTelecom.IT > cell: +39 347 266 56 18 > > > > > -- > > Sincerely, > > Giovanni Maruzzelli > OpenTelecom.IT > cell: +39 347 266 56 18 > > > > > -- > > Sincerely, > > Giovanni Maruzzelli > OpenTelecom.IT > cell: +39 347 266 56 18 > > _______________________________________________ > Users mailing list > [email protected] > http://lists.opensips.org/cgi-bin/mailman/listinfo/users > > _______________________________________________ > Users mailing list > [email protected] > http://lists.opensips.org/cgi-bin/mailman/listinfo/users >
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