---
CUBE to CUCM - without SDP REL1XX PRACK
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*Jul 22 15:49:34.264: //252/B794986E81A7/SIP/Msg/ccsipDisplayMsg:
Sent:
INVITE sip:+12515551663@192.168.123.247:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.123.236:5060;branch=z9hG4bKEA23DC
From: <sip:+12515556234@ctlab.pstn.twilio.com>;tag=1769F5F-1907
To: <sip:+12515551663@192.168.123.247>
Date: Fri, 22 Jul 2022 15:49:34 GMT
Call-ID: B7955B54-90C11ED-81ADF133-66D14F0F@192.168.123.236
Supported: 100rel,timer,resource-priority,replaces
Min-SE:  1800
Cisco-Guid: 3079968878-0151785965-2175267123-1724993295
User-Agent: Cisco-SIPGateway/IOS-17.7.2
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
CSeq: 101 INVITE
Timestamp: 1658504974
Contact: <sip:+12515556234@192.168.123.236:5060>
Expires: 180
Allow-Events: telephone-event
Max-Forwards: 62
P-Asserted-Identity: <sip:+12515556234@192.168.123.236>
Diversion: <sip:+12515551663@192.168.123.236>;reason=unconditional
Session-ID: de0767b25a12552ebdd327e69900da11;remote=00000000000000000000000000000000
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 255

v=0
o=CiscoSystemsSIP-GW-UserAgent 600 3861 IN IP4 192.168.123.236
s=SIP Call
c=IN IP4 192.168.123.236
t=0 0
m=audio 10242 RTP/AVP 0 101
c=IN IP4 192.168.123.236
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20


---
CUCM says Trying
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*Jul 22 15:49:34.266: //252/B794986E81A7/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.123.236:5060;branch=z9hG4bKEA23DC
From: <sip:+12515556234@ctlab.pstn.twilio.com>;tag=1769F5F-1907
To: <sip:+12515551663@192.168.123.247>
Date: Fri, 22 Jul 2022 20:48:04 GMT
Call-ID: B7955B54-90C11ED-81ADF133-66D14F0F@192.168.123.236
CSeq: 101 INVITE
Allow-Events: presence
Content-Length: 0


----
CUCM says Ringing - no SDP attached for audio
----

*Jul 22 15:49:34.359: //252/B794986E81A7/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 192.168.123.236:5060;branch=z9hG4bKEA23DC
From: <sip:+12515556234@ctlab.pstn.twilio.com>;tag=1769F5F-1907
To: <sip:+12515551663@192.168.123.247>;tag=638~30908be4-fda1-41ef-bf56-036c608b384b-23763944
Date: Fri, 22 Jul 2022 20:48:04 GMT
Call-ID: B7955B54-90C11ED-81ADF133-66D14F0F@192.168.123.236
CSeq: 101 INVITE
Allow: INVITE, OPTIONS, INFO, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY
Allow-Events: presence
Server: Cisco-CUCM12.5
Call-Info: <urn:x-cisco-remotecc:callinfo>;x-cisco-video-traffic-class=DESKTOP
Supported: X-cisco-srtp-fallback
Supported: Geolocation
Session-ID: 9c40ea9af7a942d083a0602b781aa639;remote=de0767b25a12552ebdd327e69900da11
P-Asserted-Identity: <sip:1002@192.168.123.247>
Remote-Party-ID: <sip:1002@192.168.123.247>;party=called;screen=yes;privacy=off
Contact: <sip:+12515551663@192.168.123.247:5060>
Content-Length: 0

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Call was ended normally
---