[OpenSIPS-Users] MS Teams ACK not received.

[Bogdan-Andrei Iancu]

Hi Ali,

The ACK is routed to the Contact address in 200 OK. So that Contact you 
set does not point back to your server - and probably MST is sending the 
ACK to some other destination.

Regards,

Bogdan-Andrei Iancu

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

On 08.04.2025 18:03, Ali Dogan wrote:
> Hello All,
>
> I'm trying to integrate OpenSIP with MS Teams. I'm using opensips with 
> Topology Hiding module. Therefore, I'm adding FQDN to Contact and but 
> MS Teams still not sending ACK to my 200 OK Shown in below.
>
> Is there anything wrong with my 200Ok I send?
>
> SIP/2.0 200 OK
> VIA:  SIP/2.0/TLS 52.114.76.76:5061;branch=z9hG4bKd29ef91c
> Record-Route: 
> <sip:sip-du-a-eu.pstnhub.microsoft.com:5061;transport=tls;lr>
> From:  "Ali Dogan" 
> <sip:+<CALLING_PARTY>@sip.pstnhub.microsoft.com:5061;user=phone>;tag=90feae90c00c4745b162d0a69fd532bc
> To:  <sip:+<Called_Party>@<MY_DOMAIN>:5061;user=phone>;tag=r4FmDXjKF7amm
> Call-ID: 778bfb54c5505df2b350f7c8ac8a6832
> CSeq:  1 INVITE
> Contact: 
>  <sip:+<Called_Party>@<MY_DOMAIN>:5061;transport=tls;did=98f.cbe7a852>
> Accept:  application/sdp
> Allow:  INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, 
> REGISTER, REFER, NOTIFY
> Require:  timer
> Supported:  timer, path, replaces
> Allow-Events:  talk, hold, conference, refer
> Session-Expires:  3600;refresher=uac
> Content-Type:  application/sdp
> Content-Disposition:  session
> Content-Length:  510
> X-Warning:  CLI Should be in E164 Format
> Remote-Party-ID:  "Called_PARTY" 
> <sip:Called_PARTY@<MY_DOMAIN>>;party=calling;privacy=off;screen=no
>
>
> Best Regards,
> Ali
>
> Ali Dogan​​​​
>
> plan.com <http://www.plan.com/>
>
> 	
>
> +44(0)3300 88 18 18 <tel:+44(0)3300%2088%2018%2018>
>
> alidogan at plan.com
>
> Facebook <https://www.facebook.com/plan.im>
>
> 	
>
> Instagram <https://www.instagram.com/plandotcom>
>
> 	
>
> LinkedIn <https://www.linkedin.com/company/plan-com>
>
> 	
>
> 	
>
> plan.com <http://www.plan.com/> is the trading name of Plan 
> Communications Limited, registered in the Isle of Man with company 
> number 010273V and Registered Office at No.5 Victoria Street, Douglas, 
> Isle of Man, IM1 2LR. This email and any attachments to it may be 
> confidential and are intended solely for the use of the individual to 
> whom it is addressed. Any views or opinions expressed are solely those 
> of the author and do not necessarily represent those of Plan. If you 
> are not the intended recipient of this email, you must neither take 
> any action based upon its contents, nor copy or show it to anyone. 
> Please contact the sender if you believe you have received this email 
> in error.
>
>
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opensips.org/pipermail/users/attachments/20250414/76a6e38f/attachment.html>