agent click answer button and 1 or 2 Second later, the call is disconnected,why?

[xiaosen weng]

  my env is UCCE9 , CVP9,  CUCM9

  There is a 1% probability that the call arrives at the agent and the agent's phone rings. agent click "answer "button , then 1 or 2 Second later, the call is disconnected. I grab the ctisvr log and find that there is a meaning I don't know. Can someone help me? The key information of the log is as follows

19:32:43:757 cg1A-ctisvr Trace: MDSIO::ProcessOPCMessage: received msgtype 21 (CTI_GET_GROUP_STATS_RESP) ...
19:32:43:757 cg1A-ctisvr Trace: MDSIO::ProcessOPCMessage: received msgtype 21 (CTI_GET_GROUP_STATS_RESP) ...
19:32:44:035 cg1A-ctisvr Trace: MDSIO::ProcessOPCMessage: received msgtype 28 (CTI_CSTA_MESSAGE) ...
19:32:44:035 cg1A-ctisvr Trace: CSTA_PRIVATE (RTP_STOPPED_IND) - (PID)=5000 DeviceID=2069 DeviceType=0CallID=85170736 ClientPort=18006 ClientAddress=10.199.41.102 Direction=INPUT
19:32:44:035 cg1A-ctisvr Trace: TailorMessageForClient - reEncode message for version 15
19:32:44:035 cg1A-ctisvr Session 3: MsgType:RTP_STOPPED_EVENT (MonitorID:0 PeripheralID:5000 ClientPort:0x4656 RTPDirection:0
19:32:44:035 cg1A-ctisvr Session 3: ConnectionDeviceIDType:CONNECTION_ID_STATIC ConnectionCallID:85170736
19:32:44:035 cg1A-ctisvr Session 3: ConnectionDeviceID:"2069" ClientAddress:"10.199.41.102" AgentID:"8008"
19:32:44:035 cg1A-ctisvr Session 3: AgentExtension:"2069" AgentInstrument:"2069" )

[Roger Kallberg]

---

The most likely reason would be an issue with codec. Check the SDL logs in CUCM.

[xiaosen weng]

Hi Roger 

  the SDL log is in the attach file, ANI(23863530282) call in to CVP and in ACD queue,  when one agent(ext:2072) ready, the phone(2072) is ringting and agent click "answer" button, then BIB recordingDNIS (4777) is working, but 1 second later, I found SDL log that CUCM send 'bye' sip message, I don't know what's wrong, could you help me ?

88519770.001 |15:25:35.479 |AppInfo |SIPTcp - wait_SdlSPISignal: Outgoing SIP TCP message to 10.199.35.31 on port 5060 index 23715
[424692185,NET]
BYE sip:23863530282@10.199.35.31:5060;transport=tcp SIP/2.0
Via: SIP/2.0/TCP 10.199.35.24:5060;branch=z9hG4bK3c5c2c378ab2
From: <sip:2072@cucm.ipcc.com;transport=tcp>;tag=140718126~88f3a605-8c22-4225-a3d9-2fed632e05f9-72501983
To: 23863530282 <sip:23863530282@10.199.35.31:5060>;tag=dscab8749b
Date: Thu, 31 Dec 2020 07:25:34 GMT
Call-ID: D63CBC444A6F11EBA3BC00F663DE3500-160939945048639322@10.199.35.31
User-Agent: Cisco-CUCM11.0
Max-Forwards: 70
CSeq: 101 BYE
Reason: Q.850;cause=16
Session-ID: 88646c2d7f49459798322aa163084769;remote=c08d6949f3a8abce4fe78ab140718126
Content-Length: 0

[BalajiSivaraj49175]

Do have logs capture with this error message if share those logs

CALLED_ADDRESS_SET_TO_REDIRECT_DESTINATION) , DEFAULT_SEARCH_SPACE encountered exception. com.cisco.jtapi.InvalidPartyExceptionImpl: Attempt to redirect to an unknown destination

[BalajiSivaraj49175]

Call treated in this order process when between ICM and other devices

[BalajiSivaraj49175]

May label number configured script not reachable that call receive disconnect message

eg script select

Run External Script #4
> Script ran for 1001 steps, max is 1000.
> Script: Default\\SG_Tfr (ID: 5030), failed to produce route for dialed number: ucm.Label, with call type: SG_IntTfr_IB (ID: 5007).
> No default label available for dialed number: ucm.Label (ID: 5064).