Collected logs from the One-X station:
Good Call:
2018-08-22 14:53:48,244 INFO 8932 Avaya.OneXAgent.WorkService.WorkServiceImpl PhoneService_CallUpdated:call=Id=9,Conf-Id=-1,State=Alerting,InnerState=INIT,RemoteParty=[MyAngel,1212720xxxx]Outgoing=False
2018-08-22 14:53:57,506 DEBUG 10996 OneXAgentUI.MainWindow GUI Method STARTED: AnswerCallHandler
2018-08-22 14:53:57,713 DEBUG 13784 Avaya.OneXAgent.CMService.Commands.Dispatcher Dispatcher: Received Event - SessionUpdatedEvent
2018-08-22 14:53:57,713 DEBUG 13784 Avaya.OneXAgent.CMService.PhoneService.Call Call updated : Id=9,Conf-Id=-1,State=Alerting,InnerState=CONNECTED,RemoteParty=[MyAngel,1212720xxxx]Outgoing=False
2018-08-22 14:53:57,714 DEBUG 13784 Avaya.OneXAgent.CMService.Commands.Dispatcher Dispatcher: Received Event - EstablishedEvent
2018-08-22 14:53:57,716 DEBUG 13784 Avaya.OneXAgent.CMService.Commands.Dispatcher Dispatcher: Received Event - AcceptSessionResponse
2018-08-22 14:53:57,967 DEBUG 10996 Avaya.OneXAgent.CMService.PhoneService.Utils End Executing method Answer
2018-08-22 14:53:57,974 DEBUG 10996 OneXAgentUI.MainWindow GUI Method ENDED: AnswerCallHandler
Bad Call
2018-08-21 13:55:05,761 DEBUG 14308 OneXAgentUI.MainWindow GUI Method STARTED: AnswerCallHandler
2018-08-21 13:55:05,762 INFO 14308 Avaya.OneXAgent.WorkService.WorkServiceImpl AnswerVoiceInteraction:vi=VoiceInteractionImpl[VI54:bfb35f3b-2dee-4fe9-aadb-6f8874290fac,cxt=219555cf-ea30-4dd1-9217-ec149cc3835a]
2018-08-21 13:55:05,762 DEBUG 14308 Avaya.OneXAgent.CMService.PhoneService.Utils Begin Executing method Answer(Call[Id=219555cf-ea30-4dd1-9217-ec149cc3835a,ConnId=19,State=Alerting])
2018-08-21 13:55:05,762 DEBUG 14308 Avaya.OneXAgent.CMService.Commands.AcceptSessionCommand Sending Request AcceptSessionRequest, timeout = 15000ms
2018-08-21 13:55:05,762 DEBUG 14308 Avaya.OneXAgent.CMService.Commands.Dispatcher Sending Request - AcceptSessionRequest
2018-08-21 13:55:05,773 DEBUG 5692 Avaya.OneXAgent.CMService.Commands.Dispatcher Dispatcher: Received Event - SessionEndedEvent
2018-08-21 13:55:05,773 DEBUG 5692 Avaya.OneXAgent.CMService.Commands.IncomingHandlerCommand IncomingCommandHandler: Received event - SessionEndedEvent
2018-08-21 13:55:05,773 DEBUG 5692 Avaya.OneXAgent.CMService.Commands.IncomingHandlerCommand Call ended : Id=19,Conf-Id=-1,State=Alerting,InnerState=INIT,RemoteParty=[!My Ramirez,1904632xxxx]Outgoing=False
2018-08-21 13:55:05,773 DEBUG 5692 Avaya.OneXAgent.CMService.PhoneService.PhoneServiceImpl NotifySessionReleased: ConnectionId = 19
2018-08-21 13:55:05,773 DEBUG 5692 Avaya.OneXAgent.CMService.PhoneService.Call Call StateChanged Call[Id=219555cf-ea30-4dd1-9217-ec149cc3835a,ConnectionId=19,OldState=Alerting,NewState=Disconnected]
To resolve: Removed latest Windows 10 PC updates.