[OpenSIPS-Users] MS Teams REFER transfer on hold.

[Slava Bendersky]

Hello Johan, 
Thank you for reply and help. 
Based on MS Teams Allow header will disable REFER and MS Teams will send invite in dialog. 
The following code snippet on 200 OK reply is resolve the issue. 

$var(refer-allow) = "INVITE, ACK, CANCEL, BYE, INFO, NOTIFY, PRACK, UPDATE, OPTIONS"; 
remove_hf("Allow"); 
insert_hf("Allow: $var(refer-allow)\r\n"); 


volga629 

From: "johan" <johan at democon.be> 
To: "OpenSIPS users mailling list" <users at lists.opensips.org> 
Sent: Friday, May 8, 2020 9:58:56 AM 
Subject: Re: [OpenSIPS-Users] MS Teams REFER transfer on hold. 



try with replying that you don't support refer. 
On 8/05/2020 11:19, Slava Bendersky via Users wrote: 





Hello Everyone, 
I am trying put tougher transfer feature with in MS Teams. 
And based on my research and testing right now is not possible with opensips. 
MS Teams are sending on hold in case of transfer and onhold as a=inactive. 
Major problem they require encode/decode params in REFER-TO REFER-BY. 

MS Teams expect observe REFER with 202 and decode params with future action. 

Here official requirements doc. 
[ https://docs.microsoft.com/en-us/microsoftteams/direct-routing-protocols-sip#call-transfer | https://docs.microsoft.com/en-us/microsoftteams/direct-routing-protocols-sip#call-transfer ] 

Any suggestion welcome. 

volga629. 



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