If Unified CCX does not accept the call within 4 seconds, the call will be rejected due to SETUP_TIMEOUT
The issue here could lie on the JTAPI side or the Unified CCX side.
If Unified CCX has sent an accept request but there is a JTAPI exception or any delay in processing the accept request or any other delay in event on JTAPI end then this issue has to be escalated to IPCBU JTAPI team.
If however, JTAPI offers the call on the CTI port but there is a delay on Unified CCX end to send the accept request to JTAPI then this would be a Unified CCX issue and has to be escalated to Unified CCX Telephony team.
An Example: 1755996: Oct 14 12:38:16.742 IST %MIVR-SS_TEL-7-UNK:Route Connection=[23003::1/(P1-jtapi_188_2) GCID=(1,990449)->ACTIVE]->OFFERED, reason=1, Event= (P1-jtapi_188_2) 990449/1 CallCtlConnOfferedEv 23003:
1756008: Oct 14 12:38:16.743 IST %MIVR-SS_TEL-7-UNK:Call.received() JTAPICallContact[id=3275,type=Cisco JTAPI Call,implId=990449/1,active=true,state=CALL_RECEIVED,inbound=true,handled=false,locale=en_U
1757409: Oct 14 12:38:27.063 IST %MIVR-SS_TEL-7-UNK:CallID: 3275, MediaID: 990449/1 CallCtlConnOfferedEv received for CTI Port: 22454, lastRedirectedAddress: 23003
1758666: Oct 14 12:38:27.171 IST %MIVR-SS_TEL-3-CALL_CONTROL_INVAL_STATE:Invalid state for Call Control operation: All Call ids=CallID:3275 MediaId:990449/1,Failure type for the CallControl error=ACCEPT
1758667: Oct 14 12:38:27.171 IST %MIVR-SS_TEL-7-UNK:CallID: 3275, MediaID: 990449/1 Accepting call for CTI Route Point:
1759232: Oct 14 12:38:36.963 IST %MIVR-SS_TEL-7-UNK:Call accept timer expired, JTAPICallContact[id=3275,type=Cisco JTAPI
1774102: Oct 14 12:38:36.985 IST %MIVR-SS_TEL-3-REJECT_CALL:Rejecting a call for reason: Call id=3275,Media id=990449/1,Failure reason=accept timer expired
1774106: Oct 14 12:38:36.986 IST %MIVR-SS_TEL-7-UNK:Call.rejected(SETUP_TIMEOUT) JTAPICallContact[id=3275,type=Cisco JTAPI