@DaveChomi 

 

Tested this quickly and you are absolutely right! end to end negotiation for tel-event was 96 and MS still sends PT 101

clipboard_image_0.png

 

while the very last SDP from MS was:

 

SIP/2.0 200 OK
FROM: sipp<sip:sipp@xxxxxx:5060>;tag=14806SIPpTag091
TO: sut<sip:+18579901522@sip.pstnhub.microsoft.com:5060>;tag=aea750caffffffff783ba42de1144988
CSEQ: 1 INVITE
CALL-ID: 1-14806@192.168.2.50
VIA: SIP/2.0/TLS 192.168.65.100:5061;branch=z9hG4bKjsrauu0050fbcetu5op0.1
RECORD-ROUTE: <sip:sip-du-a-us.pstnhub.microsoft.com:5061;transport=tls;lr>
CONTACT: <sip:api-du-b-usea.pstnhub.microsoft.com:443;transport=tls;x-i=ae3a478a-7b34-41e7-89a9-76d4539810ad;x-c=/v1/ngc/call/1f2c4d2429a35cd782ce74fac9e08a30/s/1/640ba63046144b878e093a46d3954236>
CONTENT-LENGTH: 1295
CONTENT-TYPE: application/sdp
ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY
SERVER: Microsoft.PSTNHub.SIPProxy v.2019.11.28.2 i.USEA.0

v=0
o=- 0 1 IN IP4 52.114.73.200
s=session
c=IN IP4 52.114.73.200
b=CT:50000
t=0 0
m=audio 52284 RTP/SAVP 0 13 96
a=ice-ufrag:nTGe
a=ice-pwd:4T8BipohUSo0fd1z+Z/SOOfd
a=rtcp-mux
a=candidate:10 1 UDP 184544254 52.114.73.200 52284 typ relay raddr xxxxxx rport 50010
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:6WFePvmprtmBvE9ftmV9BhgDnF8JiOd7o/XNAxZ4|2^31
a=rtpmap:0 PCMU/8000
a=rtpmap:13 CN/8000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-16
a=ptime:20

 

hope they pick it up soon
a=maxptime:200

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