----- INVITE to my callmanager cluster. ----- *Jul 22 15:11:37.538: //212/6A8B9F3F8145/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=z9hG4bKC31360 From: ;tag=153E1E9-1B06 To: Date: Fri, 22 Jul 2022 15:11:37 GMT Call-ID: 6A8C897B-90711ED-814BF133-66D14F0F@192.168.123.236 Supported: 100rel,timer,resource-priority,replaces Min-SE: 1800 Cisco-Guid: 1787535167-0151458285-2168844595-1724993295 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: 1658502697 Contact: Expires: 180 Allow-Events: telephone-event Max-Forwards: 62 P-Asserted-Identity: Diversion: ;reason=unconditional Session-ID: 726f897b04fa5a1fad5e0c9927bf2fb1;remote=00000000000000000000000000000000 Content-Type: application/sdp Content-Disposition: session;handling=required Content-Length: 256 v=0 o=CiscoSystemsSIP-GW-UserAgent 1239 9442 IN IP4 192.168.123.236 s=SIP Call c=IN IP4 192.168.123.236 t=0 0 m=audio 10186 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 ---- Trying - no SDP ---- *Jul 22 15:11:37.540: //212/6A8B9F3F8145/SIP/Msg/ccsipDisplayMsg: Received: SIP/2.0 100 Trying Via: SIP/2.0/UDP 192.168.123.236:5060;branch=z9hG4bKC31360 From: ;tag=153E1E9-1B06 To: Date: Fri, 22 Jul 2022 20:10:07 GMT Call-ID: 6A8C897B-90711ED-814BF133-66D14F0F@192.168.123.236 CSeq: 101 INVITE Allow-Events: presence Content-Length: 0 ----- CUCM sent a 183 with an SDP that looks like MOH, but is the announcement ---- *Jul 22 15:11:37.764: //212/6A8B9F3F8145/SIP/Msg/ccsipDisplayMsg: Received: SIP/2.0 183 Session Progress Via: SIP/2.0/UDP 192.168.123.236:5060;branch=z9hG4bKC31360 From: ;tag=153E1E9-1B06 To: ;tag=567~30908be4-fda1-41ef-bf56-036c608b384b-23763900 Date: Fri, 22 Jul 2022 20:10:07 GMT Call-ID: 6A8C897B-90711ED-814BF133-66D14F0F@192.168.123.236 CSeq: 101 INVITE Require: 100rel RSeq: 515811643 Allow: INVITE, OPTIONS, INFO, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY Allow-Events: presence Server: Cisco-CUCM12.5 Supported: X-cisco-srtp-fallback Supported: Geolocation P-Asserted-Identity: Remote-Party-ID: ;party=called;screen=yes;privacy=off Contact: Content-Type: application/sdp Content-Length: 183 v=0 o=CiscoSystemsCCM-SIP 567 1 IN IP4 192.168.123.247 s=SIP Call c=IN IP4 192.168.123.248 t=0 0 m=audio 24592 RTP/AVP 0 a=X-cisco-media:umoh a=ptime:20 a=rtpmap:0 PCMU/8000 ---- PRACK from CUBE ---- *Jul 22 15:11:37.765: //212/6A8B9F3F8145/SIP/Msg/ccsipDisplayMsg: Sent: PRACK sip:+12515551663@192.168.123.247:5060 SIP/2.0 Via: SIP/2.0/UDP 192.168.123.236:5060;branch=z9hG4bKC41ACA From: ;tag=153E1E9-1B06 To: ;tag=567~30908be4-fda1-41ef-bf56-036c608b384b-23763900 Date: Fri, 22 Jul 2022 15:11:37 GMT Call-ID: 6A8C897B-90711ED-814BF133-66D14F0F@192.168.123.236 CSeq: 102 PRACK RAck: 515811643 101 INVITE Allow-Events: telephone-event Max-Forwards: 70 Session-ID: 726f897b04fa5a1fad5e0c9927bf2fb1;remote=662187b7e2f9542ab294c994718006ee Content-Length: 0