[SR-Users] REFER from MS teams to Kamailio.

[Yuriy Nasida]

I do not want MS to initiate a separate call leg. I want to get
attended (consult) transfer. I call from A to B. Next call from A to C.
Next, I want transfer B to C.
 B and C is pstn numbers (i.e. not MS side).

I expect 2 variants:

1) Without REFER support at kamailio. I expect MS just will do
transfer B-->C  at MS side. But MS send one more INVITE to C Instead of
this.  i.e. C side already has the call. I do transfer and.. C side gets
one more call instead of transfer.

2) Kamilio support REFER and send it to FS. FS should transfer such
call inside itself (like it does for REFERs from zoiper or other usual
softphones).
But... MS sends weird REFER and FS can not handle it it the same way like
FS does for zoiper.

Please advice.







On Thu, 14 May 2020 at 18:39, Sergiu Pojoga <pojogas at gmail.com> wrote:

> Remove the REFER from Supported header if you want MS to initiate a
> separate call leg, it's described in the direct dialing documentation.
>
> Cheers.
>
> On Thu, May 14, 2020, 11:14 AM Yuriy Nasida, <ynasida at gmail.com> wrote:
>
>> Well, I saw similar questions in the list already but looks like nobody
>> has answer.
>>
>> Please look at REFER below.
>>
>> Kamilio get REFER from MS and sends it to FS node. Next, FS node try to
>> make 3th call for some reason.I expect that FS will not do 3th call and
>> just will connect Alice and Bob itself.
>>
>>
>> 2020/05/14 12:32:00.637027 KAM_IP:5060 -> FS_IP:5060
>> REFER sip:Alice_number at FS_IP:5060;transport=udp SIP/2.0
>> FROM: Customer1<sip:MS_TRUNK_NUMBER at sip.pstnhub.microsoft.com:5061
>> ;user=phone>;tag=a860c50a3fb54d08b4e5740fa2dfb3d6
>> TO: <sip:Alice_number at FQDN_OF_TRUNK:5061>;user=phone;tag=e8ct9S6ty13va
>> CSEQ: 4 REFER
>> CALL-ID: 2c71b2a6669b5343a231e1244b19c945
>> MAX-FORWARDS: 50
>> Via: SIP/2.0/UDP
>> FQDN_OF_TRUNK:5060;branch=z9hG4bK10ae.2c42897feca117121a23bf0c8d54cd19.0;i=c
>> VIA: SIP/2.0/TLS 52.114.75.24:5061;branch=z9hG4bK7e3e8998
>> CONTACT: <sip:api-du-a-euwe.pstnhub.microsoft.com:443
>> ;x-i=6b68e7aa-f5e2-44ec-9edf-0bacbabfce07;x-c=2c71b2a6669b5343a231e1244b19c945/d/8/b68f86794a8e44d19543f8edbee6b2fc
>> CONTENT-LENGTH: 0
>> REFER-TO: <sip:Bob_number at sip.pstnhub.microsoft.com:5061
>> ;user=phone;transport=tls>
>> REFERRED-BY: <sip:sip.pstnhub.microsoft.com:5061
>> ;x-m=8:orgid:21bc47d3-c050-4292-8234-46f7005b97aa;x-t=fb788ef8-3c4c-455a-8d62-f3c20832c0d3;x-ti=6b68e7aa-f5e2-44ec-9edf-
>>
>> acbabfce07;x-tt=aHR0cHM6Ly9hcGktZHUtYS1ldXdlLnBzdG5odWIubWljcm9zb2Z0LmNvbS92MS9uZ2MvY2FsbG5vdGlmaWNhdGlvbj9kY2k9YzIxMjE3MzEyNTQ2NDk1ZjlhYTcwODliYTkwNGIxZGQ%3D>
>> USER-AGENT: Microsoft.PSTNHub.SIPProxy v.2020.5.6.2 i.EUWE.4
>> ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY
>> P-ASSERTED-IDENTITY: <tel:MS_TRUNK_NUMBER>,<
>> sip:customer1 at m365x587912.onmicrosoft.com>
>> PRIVACY: id
>> X-AUTH-IP: 52.114.75.24
>> X-AUTH-PORT: 3136
>>
>>
>> Any advice?
>>
>>
>>
>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-users/attachments/20200514/4e4be9d9/attachment.html>