Nein, das war mein Fehler, habe nicht alles kopiert gehabt, hier nun der richtige Log-Auszug:
11:55:28.930 Call::Terminate [CM503008]: Call(1): Call is terminated
11:55:28.883 Call::Terminate [CM503008]: Call(1): Call is terminated
11:55:28.852 Call::Terminate [CM503008]: Call(1): Call is terminated
11:55:28.852 InviteADS:

nAckNotReceived [CM503019]: Call(1): ACK is not received
11:54:56.664 CallCtrl:

nLegConnected [CM503007]: Call(1): Device joined: sip:
[email protected]:40600;rinstance=8d1af50ca223a842
11:54:56.617 CallCtrl:

nLegConnected [CM503007]: Call(1): Device joined: sip:
[email protected]:5060;rinstance=590dd329a61ee37e
11:54:56.617 MediaServerReporting::SetRemoteParty [MS210005] C:1.1:Answer provided. Connection(proxy mode):92.51.138.167:9000(9001)
11:54:56.602 MediaServerReporting::SetRemoteParty [MS210001] C:1.2:Answer received. RTP connection: 127.0.0.1:40610(40611)
11:54:56.602 CallLeg::setRemoteSdp Remote SDP is set for legC:1.2
11:54:56.602 Extension:

rintEndpointInfo [CM505001]: Ext.999: Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [3CX IVR] Transport: [sip:127.0.0.1:5060]
11:54:56.602 CallCtrl:

nAnsweredCall [CM503002]: Call(1): Alerting sip:
[email protected]:40600;rinstance=8d1af50ca223a842
11:54:56.149 MediaServerReporting::SetRemoteParty [MS210004] C:1.2:Offer provided. Connection(proxy mode): 127.0.0.1:7000(7001)
11:54:56.117 CallCtrl:

nSelectRouteReq [CM503004]: Call(1): Calling: Ext:Ext.999@[Dev:sip:
[email protected]:40600;rinstance=8d1af50ca223a842]
11:54:56.117 MediaServerReporting::SetRemoteParty [MS210000] C:1.1:Offer received. RTP connection: 78.50.255.127:42002(42003)
11:54:56.117 CallCtrl:

nSelectRouteReq [CM503010]: Making route(s) to [sip:
[email protected]:5060]
11:54:56.117 CallLeg::setRemoteSdp Remote SDP is set for legC:1.1
11:54:56.117 Extension:

rintEndpointInfo [CM505001]: Ext.100: Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [3CX_VoIP_Client] Transport: [sip:92.51.138.167:5060]
11:54:55.899 CallCtrl:

nIncomingCall [CM503001]: Call(1): Incoming call from Ext.100 to [sip:
[email protected]:5060]