We brought in a straight up ACD call [this is a multi line deployment] and we're unable to click answer button, and the CTIOS logs show the following:
 
16:12:37 CTIOS1-ctios Trace: [call.5000.33583859.2221111014]
CONTROL_FAILURE_CONF : (FailureCode:1
         PeripheralErrorCode:13040 UniqueObjectID:call.5000.33583859.2221111014
         MessageID:eControlFailureConf MessageType:eAnswerCallRequest
         ErrorMessage:Error [13040]Your request to answer failed.
         TargetCILClientID:999313HQ04193-3188-dotNET_Sess(43495525)_EvtThd(5))[CallC
        onnectionAdapter, T_ADAPTER_CONTROL_FAILURE_CONF, 101]
 
The JTAPI log indicates the following:
 

16:12:36 PG1A-jgw1 Trace: MsgAnswerCall:  AlertCID: 33583859
AlertConnDevID: 8004876996/1 AnsDevID: 2221111014/0 InvID: 212489
16:12:36 PG1A-jgw1 Trace: Try to answer established connection:
MyConn: GenID: 7003 IDVal: 39913908 Dev: 2221111014/0 Ext: 2221111014
DevTgStr: 2221111014 Addr: 2221111014 State: CONNECTED CCState:
ESTABLISHED prevCCState: ESTABLISHED loggedIn: Y
16:12:36 PG1A-jgw1 Trace: MsgFailureConf:  InvID: 212489 Status: 40
16:12:37 PG1A-jgw1 Trace: MsgAnswerCall:  AlertCID: 33583859
AlertConnDevID: 8004876996/1 AnsDevID: 2221111014/0 InvID: 212490
16:12:37 PG1A-jgw1 Trace: Try to answer established connection:
MyConn: GenID: 7003 IDVal: 39913908 Dev: 2221111014/0 Ext: 2221111014
DevTgStr: 2221111014 Addr: 2221111014 State: CONNECTED CCState:
ESTABLISHED prevCCState: ESTABLISHED loggedIn: Y
16:12:37 PG1A-jgw1 Trace: MsgFailureConf:  InvID: 212490 Status: 40
 
Thank you!