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

[Sergiu Pojoga]

I personally chose the option of not removing the REFER from supported
methods. Had to handle in a custom way the attended transfer context in
Asterisk (my choice of B2B). I don't know how it is in FS.

Good luck.

On Fri, May 15, 2020 at 2:32 AM Yuriy Nasida <ynasida at gmail.com> wrote:

> Yes, Kamailio just send MS refer to FS.
> In my opinion it is MS related, because their REFER is weird. This list
> have members who did MS integration with Kamailio. That is why I would like
> to ask if you get attended (consult), transfer working with MS (with refer
> or without refer - it doesn't matter). Do you handle refer at kamailio
> somehow?
>
> чт, 14 мая 2020 г., 23:02 David Villasmil <david.villasmil.work at gmail.com
> >:
>
>> This looks Fs-related, not kamailio.
>>
>> On Thu, 14 May 2020 at 20:25, Yuriy Nasida <ynasida at gmail.com> wrote:
>>
>>> 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
>>>>>
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>> --
>> Regards,
>>
>> David Villasmil
>> email: david.villasmil.work at gmail.com
>> phone: +34669448337
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
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