[SR-Users] Kamailio as MS-Teams SBC

Pepelux pepeluxx at gmail.com
Wed Feb 3 15:23:18 CET 2021


I use something similar and all transfers between Teams users work fine:

onreply_route[PBX_REPLY_TO_TEAMS] {
        subst('/^Allow:\s(.*)\,\sREFER(.*)$/Allow:\s\1\2/ig');

Teams thinks that we don't support the refer method and it manages the
transfers.

I have not tried the external transfers but I think if the SBC rules are
ok, it must be managed by Teams.

Regards


On Wed, 3 Feb 2021 at 12:00, Davide Zanichelli <dav.zanichelli at gmail.com>
wrote:

> Outbound call transfer fixed !
>
> if can helps :
>
>         if(status=="200"){
>         remove_hf("ALLOW:");
>         append_hf("ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY \r\n",
> "CONTENT-TYPE");
>         }
>
> last but not least i need to fix transfer for incoming calls
>
> so in my case i use rtpengine for manage RTP > SRTP conversion ..
> so my issue in if i try to transfer pbx send me "not acceptable here"
> if i remove ice PBX accept the INVITE but Teams require SRTP,
> so does anyone know how to get it to work ?
>
>
>
> Thanks you !!!
>
> Davide
>
>
>
> Il giorno ven 29 gen 2021 alle ore 12:53 Davide Zanichelli <
> dav.zanichelli at gmail.com> ha scritto:
>
>> Direct Routing supports two methods for call transfer:
>>
>>    -
>>
>>    Option 1. SIP proxy processes Refer from the client locally and acts
>>    as a Referee as described in section 7.1 of RFC 3892.
>>
>>    With this option, the SIP proxy terminates the transfer and adds a
>>    new Invite.
>>    -
>>
>>    Option 2. SIP proxy sends the Refer to the SBC and acts as a
>>    Transferor as describing in Section 6 of RFC 5589.
>>
>>    With this option, the SIP proxy sends a Refer to the SBC and expects
>>    the SBC to handle the Transfer fully.
>>
>> The SIP proxy selects the method based on the capabilities reported by
>> the SBC. If the SBC indicates that it supports the method “Refer”, the
>> SIP proxy will use Option 2 for call transfers.
>>
>> The following is an example of an SBC sending the message that the Refer
>> method is supported:
>> ConsoleCopia
>>
>> ALLOW: INVITE, OPTIONS, INFO, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY
>>
>> If the SBC doesn’t indicate that Refer as a supported method, Direct
>> Routing will use Option 1 (SIP proxy acts as a Referee) . The SBC must
>> also signal that it supports the Notify method:
>>
>> Example of SBC indicating that Refer method is not supported:
>> ConsoleCopia
>>
>> ALLOW: INVITE, ACK, CANCEL, BYE, INFO, NOTIFY, PRACK, UPDATE, OPTIONS
>>
>>
>> so i try to add "REFER" in the allow ì: heder but still no luck
>> Davide
>>
>>
>> Il giorno ven 29 gen 2021 alle ore 11:24 Davide Zanichelli <
>> dav.zanichelli at gmail.com> ha scritto:
>>
>>> Ok thanks
>>>
>>> My issue is when i try to transfer a call to esternal user
>>> Thanks
>>>
>>> Il giorno ven 29 gen 2021 alle 11:10 Pepelux <pepeluxx at gmail.com> ha
>>> scritto:
>>>
>>>> I think Teams doesn't send REFER messages. Transfers are managed
>>>> directly by Teams. When you transfer a call you can send to a Team user
>>>> instead to a SIP extension.
>>>>
>>>> Regards
>>>>
>>>> On Fri, 29 Jan 2021 at 10:55, Davide Zanichelli <
>>>> dav.zanichelli at gmail.com> wrote:
>>>>
>>>>> Hello
>>>>>
>>>>> Now inbound and outbound works as expected!
>>>>> But i have a issue during the call transfer.
>>>>>
>>>>>
>>>>> transfer fail and i dont receive REFER from Teams
>>>>>
>>>>> Does someone know how to manage re invite and refer with Teams ?
>>>>>
>>>>> Any advice are welcome
>>>>> Thanks you
>>>>>
>>>>> Il giorno mer 27 gen 2021 alle 09:07 Davide Zanichelli <
>>>>> dav.zanichelli at gmail.com> ha scritto:
>>>>>
>>>>>> Hello
>>>>>>
>>>>>> im still having trouble with ack and bye ...
>>>>>>
>>>>>> in inbound call my teams client stuck in "calling"
>>>>>>
>>>>>> and seems that dont like my ack
>>>>>>
>>>>>>
>>>>>> ====================
>>>>>> tag: snd
>>>>>> pid: 131292
>>>>>> process: 6
>>>>>> time: 1611683788.220244
>>>>>> date: Tue Jan 26 17:56:28 2021
>>>>>> proto: tls ipv4
>>>>>> srcip: 69.172.96.197
>>>>>> srcport: 5061
>>>>>> dstip: 52.114.75.24
>>>>>> dstport: 5061
>>>>>> ~~~~~~~~~~~~~~~~~~~~
>>>>>> ACK sip:+1010 at sip.pstnhub.microsoft.com:5061;transport=tls SIP/2.0
>>>>>> Record-Route: <sip:kml.call2teams.io:5061
>>>>>> ;transport=tls;r2=on;ftag=DKU70jvS4K86p;lr>
>>>>>> Via: SIP/2.0/TLS 69.172.96.197:5061
>>>>>> ;branch=z9hG4bKaf91.b6d38c1afb72b2dd4847cc3f7d99d698.0
>>>>>> v:SIP/2.0/UDP
>>>>>> 185.132.68.116;received=185.132.68.116;rport=5060;branch=z9hG4bKZXc92a9KDyUFg
>>>>>> Max-Forwards:69
>>>>>> f:"Davide Zanichelli"<sip:3454558075 at 185.132.68.116
>>>>>> >;tag=DKU70jvS4K86p
>>>>>> t:<sip:+1010 at sip.pstnhub.microsoft.com:5061
>>>>>> >;tag=25f6b5d613cb478aa1d495a391860101
>>>>>> i:9493b287-a2f6-4891-859c-231994af46d6
>>>>>> CSeq:31288100 ACK
>>>>>>
>>>>>> m:<sip:mod_sofia at 185.132.68.116:5060>
>>>>>> l:0
>>>>>>
>>>>>>
>>>>>>
>>>>>> Il giorno gio 21 gen 2021 alle ore 09:18 Davide Zanichelli <
>>>>>> dav.zanichelli at gmail.com> ha scritto:
>>>>>>
>>>>>>> Hello
>>>>>>> i dont understand why teams reply me 481 !!!
>>>>>>>
>>>>>>> Thanks
>>>>>>> davide
>>>>>>>
>>>>>>> ||||||||||||||||||||
>>>>>>> ====================
>>>>>>> tag: snd
>>>>>>> pid: 102385
>>>>>>> process: 6
>>>>>>> time: 1611216424.610918
>>>>>>> date: Thu Jan 21 08:07:04 2021
>>>>>>> proto: tls ipv4
>>>>>>> srcip: 69.172.96.197
>>>>>>> srcport: 5061
>>>>>>> dstip: 52.114.75.24
>>>>>>> dstport: 5061
>>>>>>> ~~~~~~~~~~~~~~~~~~~~
>>>>>>> BYE sip:+1010 at sip.pstnhub.microsoft.com:5061;transport=tls SIP/2.0
>>>>>>> Record-Route: <sip:kml.call2teams.io:5061
>>>>>>> ;transport=tls;r2=on;ftag=7NFv9B0B3K6QB;lr>
>>>>>>> Record-Route: <sip:69.172.96.197:5060;r2=on;ftag=7NFv9B0B3K6QB;lr>
>>>>>>> Via: SIP/2.0/TLS 69.172.96.197:5061
>>>>>>> ;branch=z9hG4bK02e5.5f6af95bad6e683b84ebf07b31a7755f.0
>>>>>>> v:SIP/2.0/UDP
>>>>>>> 185.132.68.116;received=185.132.68.116;rport=5060;branch=z9hG4bK9j0gNmmXj9Q6D
>>>>>>> Max-Forwards:69
>>>>>>> f:"Davide Zanichelli"<sip:3454558075 at 185.132.68.116
>>>>>>> >;tag=7NFv9B0B3K6QB
>>>>>>> t:<sip:+1010 at sip.pstnhub.microsoft.com:5061
>>>>>>> ;user=phone>;tag=da13ee6f8a0f4277b597fa9fd40a783f
>>>>>>> i:781214b3-d662-1239-fc81-9259e6a86632
>>>>>>> CSeq:31054416 BYE
>>>>>>> User-Agent:FreeSWITCH-mod_sofia/1.6.20~64bit
>>>>>>>
>>>>>>> Allow:INVITE,ACK,BYE,CANCEL,OPTIONS,MESSAGE,INFO,UPDATE,REGISTER,REFER,PRACK,NOTIFY,PUBLISH,SUBSCRIBE
>>>>>>> k:precondition,100rel,path,replaces
>>>>>>> Reason:Q.850;cause=16;text="NORMAL_CLEARING"
>>>>>>> l:0
>>>>>>>
>>>>>>> ||||||||||||||||||||
>>>>>>> ====================
>>>>>>> tag: rcv
>>>>>>> pid: 102417
>>>>>>> process: 38
>>>>>>> time: 1611216424.629297
>>>>>>> date: Thu Jan 21 08:07:04 2021
>>>>>>> proto: tls ipv4
>>>>>>> srcip: 52.114.75.24
>>>>>>> srcport: 5061
>>>>>>> dstip: 69.172.96.197
>>>>>>> dstport: 5061
>>>>>>> ~~~~~~~~~~~~~~~~~~~~
>>>>>>> SIP/2.0 481 Call Leg/Transaction Does Not Exist
>>>>>>> FROM: "Davide Zanichelli"<sip:3454558075 at 185.132.68.116
>>>>>>> >;tag=7NFv9B0B3K6QB
>>>>>>> TO: <sip:+1010 at sip.pstnhub.microsoft.com:5061
>>>>>>> ;user=phone>;tag=da13ee6f8a0f4277b597fa9fd40a783f
>>>>>>> CSEQ: 31054416 BYE
>>>>>>> CALL-ID: 781214b3-d662-1239-fc81-9259e6a86632
>>>>>>> VIA: SIP/2.0/TLS 69.172.96.197:5061;branch=z9hG4bK02e5.5f6af95bad6e683b84ebf07b31a7755f.0,SIP/2.0/UDP
>>>>>>> 185.132.68.116;received=185.132.68.116;branch=z9hG4bK9j0gNmmXj9Q6D;rport=5060
>>>>>>> REASON:
>>>>>>> Q.850;cause=95;text="90301fea-2875-4a99-b6f0-25e35ff07710;Call leg
>>>>>>> unavailable"
>>>>>>> CONTENT-LENGTH: 0
>>>>>>> ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY
>>>>>>> SERVER: Microsoft.PSTNHub.SIPProxy v.2021.1.15.7 i.EUWE.8
>>>>>>>
>>>>>>> Il giorno mer 20 gen 2021 alle ore 18:03 Richard Fuchs <
>>>>>>> rfuchs at sipwise.com> ha scritto:
>>>>>>>
>>>>>>>> On 19/01/2021 07.11, Daniel-Constantin Mierla wrote:
>>>>>>>> > Hello,
>>>>>>>> >
>>>>>>>> > I built rtpengine deb packages for debian just a few days ago and
>>>>>>>> all
>>>>>>>> > went fine. I used the file mr8.5.1.5.tar.gz from the github
>>>>>>>> releases
>>>>>>>> > of rtpengine project.
>>>>>>>> >
>>>>>>>> > However, I noticed that some past releases fail to build because
>>>>>>>> of
>>>>>>>> > the tests. I had to edit a bit the Makefile to disable the tests
>>>>>>>> target.
>>>>>>>>
>>>>>>>> If some of the tests are causing a problem, you can let me know and
>>>>>>>> I'll
>>>>>>>> see if they can be defused to make things work for everybody.
>>>>>>>>
>>>>>>>> Cheers
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> 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
>>>>>
>>>> _______________________________________________
>>>> 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
>
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