[OpenSIPS-Users] Opensips MS Teams lost BYE

[Mark Miranda]

I have basically the same problem where the BYE packet does not seem to be routing properly, however I am not using any of the nat functions.

> On Jul 6, 2020, at 3:46 AM, John Quick <john.quick at smartvox.co.uk> wrote:
> 
> Chris,
> 
> You must not call fix_nated_contact() for any SIP requests or SIP responses
> coming from MS Teams.
> If you do, it will cause exactly the problems you describe for loose-routed
> sequential requests such as BYE.
> 
> Just to explain: fix_nated_contact() should only be used when the messages
> come via a NAT router. It must not be used for messages coming from a Proxy
> (assuming the Proxy adds a Record-Route header, as happens with Teams), even
> though both cases may appear to need fixing when you use nat_uac_test().
> 
> John Quick
> Smartvox Limited
> Web: www.smartvox.co.uk
> 
>> I've managed to get the PBX to send the BYE to the SBC and it is now
> forwarding on to MS (although MS are not sending a reply but we have opened
> a case for this).
> 
>> We are struggling to get the BYE packet to go back to MS Teams when the
> call is initiated by Teams.
> 
> 
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