[SR-Users] kamailio as SBC for Teams

Thu Apr 9 17:07:32 CEST 2020

Hello,

I read https://skalatan.de/en/blog/kamailio-sbc-teams and trying to use
kamailio for teams.
But I faced that MS not responding ACK to my 200OK. Somethin is wrong, but
I don't know what. I call from teams to kamailio.
Can you help me please

This is initial INVITE from Teams:
2020/04/09 22:55:17.346092 52.114.7.24:1024 -> KAMAILIO_IP:5061
INVITE sip:+xxxxxxxxx at MY_KAMAILIO_FQDN:5061;user=phone;transport=tls SIP/2.0
FROM: Aidar Kamalov<sip:+xxxxxxxxx at sip.pstnhub.microsoft.com:5061
;user=phone>;tag=de28a5b5333b451a97312097f91f5564
TO: <sip:xxxxxxxx at MY_KAMAILIO_FQDN:5061;user=phone>
CSEQ: 1 INVITE
CALL-ID: 3d5ad3cdd01457be94d127fa20478cf1
MAX-FORWARDS: 70
VIA: SIP/2.0/TLS 52.114.7.24:5061;branch=z9hG4bKdb903e2c
RECORD-ROUTE: <sip:sip-du-a-as.pstnhub.microsoft.com:5061;transport=tls;lr>
CONTACT: <sip:api-du-a-euno.pstnhub.microsoft.com:443
;x-i=903eeaac-b19e-43a0-8e75-bb222049922a;x-c=3d5ad3cdd01457be94d127fa20478cf1/d/8/d3d2c2e3f3c14f88bb2fe843b4bc70e4>
CONTENT-LENGTH: 2426
USER-AGENT: Microsoft.PSTNHub.SIPProxy v.2020.4.4.3 i.ASEA.5
CONTENT-TYPE: application/sdp
ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY

v=0
o=- 0 0 IN IP4 52.114.252.146
s=session
c=IN IP4 52.114.252.146
b=CT:50000
t=0 0
m=audio 52939 RTP/SAVP 104 9 111 18 0 8 103 97 13 118 119 101
a=rtcp:52925
a=ice-ufrag:rKBm
a=ice-pwd:BkjUnkfIvYV5pjteSteevL1O
a=rtcp-mux
a=candidate:4 1 UDP 184547839 52.114.252.146 52939 typ relay raddr
31.13.144.55 rport 57780
a=candidate:4 2 UDP 184547326 52.114.252.146 52925 typ relay raddr
31.13.144.55 rport 57781
a=candidate:1 1 tcp-act 2121006590 100.78.247.179 1024 typ host
a=candidate:1 2 tcp-act 2121006590 100.78.247.179 1024 typ host
a=candidate:2 1 UDP 2130705919 100.78.247.179 39182 typ host
a=candidate:2 2 UDP 2130705406 100.78.247.179 39183 typ host
a=candidate:3 1 UDP 1694497791 31.13.144.55 57780 typ srflx raddr
100.78.247.179 rport 39182
a=candidate:3 2 UDP 1694497278 31.13.144.55 57781 typ srflx raddr
100.78.247.179 rport 39183
a=candidate:5 1 tcp-act 1684796926 31.13.144.55 9761 typ srflx raddr
100.78.247.179 rport 41775
a=candidate:5 2 tcp-act 1684796926 31.13.144.55 9761 typ srflx raddr
100.78.247.179 rport 41775
a=candidate:6 1 tcp-pass 174453758 52.114.252.130 59925 typ relay raddr
31.13.144.55 rport 9761
a=candidate:6 2 tcp-pass 174453758 52.114.252.130 59925 typ relay raddr
31.13.144.55 rport 9761
a=candidate:7 1 tcp-act 174846462 52.114.252.130 59925 typ relay raddr
31.13.144.55 rport 9761
a=candidate:7 2 tcp-act 174846462 52.114.252.130 59925 typ relay raddr
31.13.144.55 rport 9761
a=x-candidate-info:4 network-type=WWAN
a=x-candidate-info:1 network-type=WWAN
a=x-candidate-info:2 network-type=WWAN
a=x-candidate-info:3 network-type=WWAN
a=x-candidate-info:5 network-type=WWAN
a=x-candidate-info:6 network-type=WWAN
a=x-candidate-info:7 network-type=WWAN
a=crypto:1 AES_CM_128_HMAC_SHA1_32
inline:DY3r3DWRojJm94CJQ83OAavmlRCwPf5ciRxHCT40|2^31
a=crypto:2 AES_CM_128_HMAC_SHA1_80
inline:DY3r3DWRojJm94CJQ83OAavmlRCwPf5ciRxHCT40|2^31
a=crypto:3 AES_CM_128_HMAC_SHA1_80
inline:DY3r3DWRojJm94CJQ83OAavmlRCwPf5ciRxHCT40|2^31|1:1
a=rtpmap:104 SILK/16000
a=fmtp:104 useinbandfec=1; usedtx=0
a=rtpmap:9 G722/8000
a=rtpmap:111 SIREN/16000
a=fmtp:111 bitrate=16000
a=rtpmap:18 G729/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:103 SILK/8000
a=fmtp:103 useinbandfec=1; usedtx=0
a=rtpmap:97 RED/8000
a=rtpmap:13 CN/8000
a=rtpmap:118 CN/16000
a=rtpmap:119 CN/24000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=maxptime:200

and my 200OK to MS is:

2020/04/09 22:55:19.976427 KAMAILIO_IP:5061 -> 52.114.7.24:1024
SIP/2.0 200 OK
Record-Route:
<sip:KAMAILIO_FQDN_DOMAIN:5061;transport=tls;ftag=de28a5b5333b451a97312097f91f5564;lr=on>
Record-Route:
<sip:KAMAILIO_IP:5060;ftag=de28a5b5333b451a97312097f91f5564;lr=on>
Via: SIP/2.0/TLS 52.114.7.24:5061;rport=1024;branch=z9hG4bKdb903e2c
Record-Route:
<sip:ENDPOINT_BEHIND_KAMAILIO_IP;line=sr-QyfKA15Kw1rKw1hKEoPljM0oE1VLX10RQ1VLX10gkY37WJufE1BBjJhVE6E6r14VEJ5Nj6ElE1UNjyrNEJrVjnr.AyudmMV1rg52rJrlAyNBkMVNmSE*>
Record-Route:
<sip:ENDPOINT_BEHIND_KAMAILIO_IP;r2=on;lr=on;ftag=de28a5b5333b451a97312097f91f5564;did=cba.af1;nat=yes>
Record-Route:
<sip:KAMAILIO_IP;r2=on;lr=on;ftag=de28a5b5333b451a97312097f91f5564;did=cba.42a1;nat=yes>
Record-Route:
<sip:KAMAILIO_IP:5061;transport=tls;r2=on;lr=on;ftag=de28a5b5333b451a97312097f91f5564;did=cba.42a1;nat=yes>
Record-Route: <sip:sip-du-a-as.pstnhub.microsoft.com:5061;transport=tls;lr>
To: <sip:+xxxxxxxxxx at KAMAILIO_FQDN_DOMAIN
:5061;user=phone>;tag=3795432917-393759697
From: <sip:+xxxxxxxxxx at sip.pstnhub.microsoft.com:5061
;user=phone>;tag=de28a5b5333b451a97312097f91f5564
Call-ID: 3d5ad3cdd01457be94d127fa20478cf1
CSeq: 1 INVITE
Allow:
PUBLISH,MESSAGE,UPDATE,PRACK,SUBSCRIBE,REFER,INFO,NOTIFY,REGISTER,OPTIONS,BYE,INVITE,ACK,CANCEL
Content-Type: application/sdp
Accept: application/sdp
Content-Length: 282
User-Agent: MY_DOMAIN
Contact:
<sip:KAMAILIO_IP;line=sr-DHZToOtmMdn7MODy9AnmD10TGLpUrL4noJCE4A03DdQE9LUaMXr*>

v=0
o=ETPI-MSX1 0 0 IN IP4 KAMAILIO_IP
s=sip call
c=IN IP4 KAMAILIO_IP
t=0 0
m=audio 12176 RTP/SAVP 8
b=AS:64
a=maxptime:20
a=rtpmap:8 PCMA/8000
a=sendrecv
a=rtcp:12177
a=crypto:1 AES_CM_128_HMAC_SHA1_32
inline:03ZmcR+CxxB7k7C8QvWBgseYq7cH7py7VxqfLM8j
a=ptime:20

-- 
Aydar A. Kamalov
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