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, &lt;ynasida(a)gmail.com&gt; 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@FS_IP:5060;transport=udp SIP/2.0 > FROM: Customer1<sip:MS_TRUNK_NUMBER@sip.pstnhub.microsoft.com:5061 > ;user=phone>;tag=a860c50a3fb54d08b4e5740fa2dfb3d6 > TO: <sip:Alice_number@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@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@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(a)lists.kamailio.org > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users > _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

This looks Fs-related, not kamailio. On Thu, 14 May 2020 at 20:25, Yuriy Nasida &lt;ynasida(a)gmail.com&gt; 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 &lt;pojogas(a)gmail.com&gt; 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, &lt;ynasida(a)gmail.com&gt; >> 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@FS_IP:5060;transport=udp SIP/2.0 >>> FROM: Customer1<sip:MS_TRUNK_NUMBER@sip.pstnhub.microsoft.com:5061 >>> ;user=phone>;tag=a860c50a3fb54d08b4e5740fa2dfb3d6 >>> TO: <sip:Alice_number@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@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@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(a)lists.kamailio.org >>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users >>> >> _______________________________________________ >> Kamailio (SER) - Users Mailing List >> sr-users(a)lists.kamailio.org >> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users >> > _______________________________________________ > Kamailio (SER) - Users Mailing List > sr-users(a)lists.kamailio.org > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users > -- Regards, David Villasmil email: david.villasmil.work(a)gmail.com phone: +34669448337 _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

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 &lt;ynasida(a)gmail.com&gt; 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(a)gmail.com&gt;gt;: > >> This looks Fs-related, not kamailio. >> >> On Thu, 14 May 2020 at 20:25, Yuriy Nasida &lt;ynasida(a)gmail.com&gt; 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 &lt;pojogas(a)gmail.com&gt; >>> 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, &lt;ynasida(a)gmail.com&gt; >>>> 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@FS_IP:5060;transport=udp SIP/2.0 >>>>> FROM: Customer1<sip:MS_TRUNK_NUMBER@sip.pstnhub.microsoft.com:5061 >>>>> ;user=phone>;tag=a860c50a3fb54d08b4e5740fa2dfb3d6 >>>>> TO: <sip:Alice_number@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@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@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(a)lists.kamailio.org >>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users >>>>> >>>> _______________________________________________ >>>> Kamailio (SER) - Users Mailing List >>>> sr-users(a)lists.kamailio.org >>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users >>>> >>> _______________________________________________ >>> Kamailio (SER) - Users Mailing List >>> sr-users(a)lists.kamailio.org >>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users >>> >> -- >> Regards, >> >> David Villasmil >> email: david.villasmil.work(a)gmail.com >> phone: +34669448337 >> _______________________________________________ >> Kamailio (SER) - Users Mailing List >> sr-users(a)lists.kamailio.org >> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users >> > _______________________________________________ > Kamailio (SER) - Users Mailing List > sr-users(a)lists.kamailio.org > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users > _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users