Microsoft Teams Direct routing | Incoming Calls dropping after 30 seocnds

[Rohit001]

Hi Everyone,

I am using microsoft teams direct routing, outgoing calls are working fine,.

For incoming calls, we are not getting acknowledgement from the provider side, well, i am considering there is an issue with 200 OK coming from teams which is the reason Provider is not sending ACK in response to this 200 OK, below i am sharing traces,

INVITE going to Microsoft Teams :

========================

INVITE sip:+email address removed for privacy reasons:5061;user=phone;transport=tls SIP/2.0
Via: SIP/2.0/TLS 103.146.242.13:5061;branch=z9hG4bKbr37n0008gdanqic7ts0.1
Call-ID: email address removed for privacy reasons
To: <sip:+919986962695@52.114.14.70:5061;transport=tls;user=phone>
From: <sip:+email address removed for privacy reasons:5061;transport=tls;user=phone>;tag=6347d80c-6347e1c010ff4f92-0908-01-ic-ibo-lucentIBCF-000004
CSeq: 1 INVITE
Max-Forwards: 68
Content-Type: application/sdp
Content-Length: 543
Request-Disposition: no-fork
P-Asserted-Identity: <sip:+919760175779@[2402:3a80:2000:c63a::6]:5060;user=phone>
P-Asserted-Identity: <tel:+919760175779>
Contact: <sip:+email address removed for privacy reasons:5061;x-fbi=stdn-11;yop=00.00.E50B38BC.0000.702E;x-ctidx=12-21093;transport=tls>;sip.ice
Supported: norefersub,100rel
Allow: ACK,BYE,CANCEL,INFO,INVITE,NOTIFY,OPTIONS,PRACK,REFER,UPDATE
P-Charging-Vector: icid-value=GYloAEVZEtB7TeriLnDMBSEP;icid-generated-at=10.40.44.135;orig-ioi=ims.mnc086.mcc404.3gppnetwork.org
P-Early-Media: supported
X-MS-SBC: Oracle/VM/9.1.0

v=0
o=LucentIBCF 1979343852 1979343852 IN IP4 103.146.242.143
s=-
c=IN IP4 103.146.242.143
t=0 0
a=ice-lite
m=audio 20556 RTP/SAVP 96 8 97 13
b=AS:80
a=rtpmap:96 AMR/8000
a=fmtp:96 mode-change-capability=2; max-red=0
a=rtpmap:8 PCMA/8000
a=rtpmap:97 telephone-event/8000
a=rtpmap:13 CN/8000
a=maxptime:20
a=ptime:20
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:vMSQfxE4CJF69XWBSxp61OiKZlaex23gkleYGmwM|2^31
a=rtcp-mux
a=ice-pwd:T/FyTi+98hARCRc2uBUOy3
a=ice-ufrag:JDQn
a=candidate:1 1 UDP 659136 103.146.242.143 20556 typ host

180 ringing coming from microsoft teams 
-=======================================
========================================

2022-10-13 21:04:12.943 
SIP/2.0 180 Ringing
FROM: <sip:+email address removed for privacy reasons:5061;transport=tls;user=phone>;tag=6347d80c-6347e1c010ff4f92-0908-01-ic-ibo-lucentIBCF-000004
TO: <sip:+919986962695@52.114.14.70:5061;transport=tls;user=phone>;tag=450ed1dd0c2141f9991478dfc177d269
CSEQ: 1 INVITE
CALL-ID: email address removed for privacy reasons
VIA: SIP/2.0/TLS 103.146.242.13:5061;branch=z9hG4bKbr37n0008gdanqic7ts0.1
RECORD-ROUTE: <sip:sip-du-a-as.pstnhub.microsoft.com:5061;transport=tls;lr>
CONTACT: <sip:api-du-c-asse.pstnhub.microsoft.com:443;x-i=9fd2f7ce-2229-4f87-a217-aae528ad7b3e;x-c=3f5d436e6d675b25b8ba1b26e5db1cf2/s/1/dd26e7ab31a642ff941441978c8745eb>
CONTENT-LENGTH: 0
ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY
SERVER: Microsoft.PSTNHub.SIPProxy v.2022.9.15.1 i.ASSE.1

============================================================
200 OK coming from Teams:
========================================

SIP/2.0 200 OK
FROM: <sip:+email address removed for privacy reasons:5061;transport=tls;user=phone>;tag=6347d80c-6347e1c010ff4f92-0908-01-ic-ibo-lucentIBCF-000004
TO: <sip:+919986962695@52.114.14.70:5061;transport=tls;user=phone>;tag=215ed2d8ffffffff3a90552bacd739df
CSEQ: 1 INVITE
CALL-ID: email address removed for privacy reasons
VIA: SIP/2.0/TLS 103.146.242.13:5061;branch=z9hG4bKbr37n0008gdanqic7ts0.1
RECORD-ROUTE: <sip:sip-du-a-as.pstnhub.microsoft.com:5061;transport=tls;lr>
CONTACT: <sip:api-du-c-asse.pstnhub.microsoft.com:443;x-i=9fd2f7ce-2229-4f87-a217-aae528ad7b3e;x-c=3f5d436e6d675b25b8ba1b26e5db1cf2/s/1/dd26e7ab31a642ff941441978c8745eb>
CONTENT-LENGTH: 1308
CONTENT-TYPE: application/sdp
ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY
SERVER: Microsoft.PSTNHub.SIPProxy v.2022.9.15.1 i.ASSE.1

v=0
o=- 0 1 IN IP4 52.113.158.233
s=session
c=IN IP4 52.113.158.233
b=CT:2000
t=0 0
m=audio 51588 RTP/SAVP 8 13 97
a=ice-ufrag:h2/F
a=ice-pwd:ACDpD/ECNJ6lqx/5oehstdxD
a=rtcp-mux
a=candidate:4 1 UDP 1258289150 52.113.158.233 51588 typ relay raddr 106.204.201.219 rport 52363
a=candidate:2 1 UDP 2130705406 192.168.124.111 50012 typ host
a=candidate:1 1 tcp-act 2121006590 192.168.124.111 50000 typ host
a=candidate:3 1 UDP 1694497278 106.204.201.219 52363 typ srflx raddr 192.168.124.111 rport 50012
a=candidate:5 1 tcp-act 1684796926 106.204.201.219 38992 typ srflx raddr 192.168.124.111 rport 50016
a=candidate:6 1 tcp-pass 1248195582 52.113.158.173 59518 typ relay raddr 106.204.201.219 rport 38992
a=candidate:7 1 tcp-act 1248588286 52.113.158.173 59518 typ relay raddr 106.204.201.219 rport 38992
a=x-candidate-info:4 network-type=WLAN
a=x-candidate-info:2 network-type=WLAN
a=x-candidate-info:1 network-type=WLAN
a=x-candidate-info:3 network-type=WLAN
a=x-candidate-info:5 network-type=WLAN
a=x-candidate-info:6 network-type=WLAN
a=x-candidate-info:7 network-type=WLAN
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:peNAJ1K+u3t2BZNqT0XP+PUqgiYkgX6I86cE1Lab|2^31
a=rtpmap:8 PCMA/8000
a=rtpmap:13 CN/8000
a=rtpmap:97 telephone-event/8000
a=fmtp:97 0-16
a=ptime:20
a=maxptime:200


200 OK being sent to provider
=====================================
2022-10-13 21:04:18.651 
SIP/2.0 200 OK
Call-ID: email address removed for privacy reasons
Via: SIP/2.0/UDP [2402:3a80:2000:c63a::6]:5060;branch=z9hG4bK6ad0348121c70fc3846f9a3d7ce06a6f6347c58b-7-11e-6347e1c01109b0fe
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bK_0019_9747-140098478423084
Via: SIP/2.0/UDP 169.254.218.11:5060;received=169.254.218.11;branch=z9hG4bK8f19e47b1ae8b5a3333b2da51d17224a6347d80c-0-1-6347e1c011018aba
To: <sip:+919986962695@[2402:3a80:2000:c66f::4]:5060;transport=udp;user=phone>;tag=215ed2d8ffffffff3a90552bacd739df
From: <sip:+919760175779@[2402:3a80:2000:c63a::6]:5060;transport=udp;user=phone>;tag=6347d80c-6347e1c010ff4f92-0908-01-ic-ibo-lucentIBCF-000004
CSeq: 1 INVITE
Contact: <sip:[2402:3a80:2000:c66f::4]:5060;x-i=9fd2f7ce-2229-4f87-a217-aae528ad7b3e;x-c=3f5d436e6d675b25b8ba1b26e5db1cf2/s/1/dd26e7ab31a642ff941441978c8745eb;transport=udp>
CONTENT-LENGTH: 474
CONTENT-TYPE: application/sdp
ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY
SERVER: Microsoft.PSTNHub.SIPProxy v.2022.9.15.1 i.ASSE.1

v=0
o=- 0 1 IN IP6 2402:3a80:2000:c671::4
s=session
c=IN IP6 2402:3a80:2000:c671::4
b=CT:2000
t=0 0
m=audio 10142 RTP/AVP 8 97
a=rtpmap:8 PCMA/8000
a=rtpmap:97 telephone-event/8000
a=fmtp:97 0-16
a=x-candidate-info:2 network-type=WLAN
a=x-candidate-info:1 network-type=WLAN
a=x-candidate-info:3 network-type=WLAN
a=x-candidate-info:5 network-type=WLAN
a=x-candidate-info:6 network-type=WLAN
a=x-candidate-info:7 network-type=WLAN
a=maxptime:200
a=ptime:20
=======================================================


shouldn't be send/recv  included in the SDP of 200OK coming from Teams ?