UC500.com

My 3-party SIP Phone was unable to register with UC520 - Error code 503 - Service Unavailable - registrar unavail or not enabled

Bellow is debug with "debug ccsip all", please advise how to show it :

UC520#term mon
UC520#debug ccsip all
This may severely impact system performance. Continue? [confirm]
All SIP Call tracing is enabled
UC520#
001814: Nov 16 04:04:23.918: //-1/xxxxxxxxxxxx/SIP/Info/sipSPIDeleteContextFromTable: Context for key=[2281] removed.
001815: Nov 16 04:04:23.918: //-1/69CCA2D68CF5/SIP/Info/sipSPIUdeleteCcbFromUASReqTable: ****Deleting from UAS Request table.
001816: Nov 16 04:04:23.918: //-1/69CCA2D68CF5/SIP/Info/sipSPIUdeleteCcbFromTable: Deleting from table. ccb=0x84EFCC9C key=E8799A854B644C179790663F0AF881B60xc0a801713405d223d97f246
001817: Nov 16 04:04:23.918: //-1/69CCA2D68CF5/SIP/Info/sipSPIUdeleteCcbFromUASRespTable: ****Deleting from UAS Response table.
001818: Nov 16 04:04:23.918: //-1/69CCA2D68CF5/SIP/Info/sipSPIFlushEventBufferQueue: There are 0 events on the internal queue that are going to be free'd
001819: Nov 16 04:04:23.918: //-1/69CCA2D68CF5/SIP/Info/sipSPIUfreeOneCCB: Freeing ccb 84EFCC9C
001820: Nov 16 04:04:30.006: //-1/xxxxxxxxxxxx/SIP/Info/sipSPIDeleteContextFromTable: Context for key=[2282] removed.
001821: Nov 16 04:04:30.006: //-1/6D6D99AC8CF6/SIP/Info/sipSPIUdeleteCcbFromUASReqTable: ****Deleting from UAS Request table.
001822: Nov 16 04:04:30.006: //-1/6D6D99AC8CF6/SIP/Info/sipSPIUdeleteCcbFromTable: Deleting from table. ccb=0x85762800 key=E8799A854B644C179790663F0AF881B60xc0a801713405d353d980a0f
001823: Nov 16 04:04:30.006: //-1/6D6D99AC8CF6/SIP/Info/sipSPIUdeleteCcbFromUASRespTable: ****Deleting from UAS Response table.
001824: Nov 16 04:04:30.006: //-1/6D6D99AC8CF6/SIP/Info/sipSPIFlushEventBufferQueue: There are 0 events on the internal queue that are going to be free'd
001825: Nov 16 04:04:30.006: //-1/6D6D99AC8CF6/SIP/Info/sipSPIUfreeOneCCB: Freeing ccb 85762800
001826: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Info/HandleUdpSocketReads: Msg enqueued for SPI with IP addr: 192.168.5.4:5060
001827: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Info/ccsip_process_sipspi_queue_event: ccsip_spi_get_msg_type returned: 2 for event 1
001828: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Transport/sipTransportProcessNWNewConnMsg: context=0x00000000
001829: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Received:
REGISTER sip:192.168.2.1 SIP/2.0
Via: SIP/2.0/UDP 192.168.5.4;branch=z9hG4bKc0a801710000004a491f9bd200000c4900000016;rport
From: "unknown" ;tag=5da13d988ac2
To:
Contact:
Call-ID: E8799A854B644C179790663F0AF881B60xc0a80171
CSeq: 5 REGISTER
Max-Forwards: 70
User-Agent: SJphone/1.65.377a (SJ Labs)
Content-Length: 0

001830: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Info/ccsip_new_msg_preprocessor: Checking Invite Dialog
001831: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Info/sipSPIFindRegisterCcb: *****CCB NOT found in UAS Request table. ccb=0x00000000
001832: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Info/sipSPIAddContextToTable: Added context(0x84EFF368) with key=[2283] to table
001833: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Transport/sipSPIUpdateResponseInfo: Dialog Transaction Address 192.168.5.4,Port 5060, Transport 1, SentBy Port 5060
001834: Nov 16 04:04:30.950: //-1/81111B728CF7/SIP/State/sipSPIChangeState: 0x84EFF368 : State change from (STATE_NONE, SUBSTATE_NONE) to (STATE_IDLE, SUBSTATE_NONE)
001835: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Transport/sipSPIUpdateResponseInfo: Subsq Transaction Address 192.168.5.4,Port 5060, Transport 1, SentBy Port 5060
001836: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Info/sipSPISetDateHeader: Converting TimeZone WAST to SIP default timezone = GMT
001837: Nov 16 04:04:30.950: //-1/xxxxxxxxxxxx/SIP/Transport/sipSPIUpdateResponseInfo: Subsq Transaction Address 192.168.5.4,Port 5060, Transport 1, SentBy Port 5060
001838: Nov 16 04:04:30.950: //-1/81111B728CF7/SIP/Transport/sipSPISendResponse: Sending INFO Response to the transport layer
001839: Nov 16 04:04:30.950: //-1/81111B728CF7/SIP/Transport/sipSPITransportSendMessage: msg=0x8750CAE4, addr=192.168.5.4, port=5060, sentBy_port=5060, is_req=0, transport=1, switch=0, callBack=0x00000000
001840: Nov 16 04:04:30.950: //-1/81111B728CF7/SIP/Transport/sipSPITransportSendMessage: Proceedable for sending msg immediately
001841: Nov 16 04:04:30.950: //-1/81111B728CF7/SIP/Transport/sipTransportLogicSendMsg: switch transport is 0
001842: Nov 16 04:04:30.954: //-1/xxxxxxxxxxxx/SIP/Transport/sipTransportPostSendMessage: Posting send for msg=0x8750CAE4, addr=192.168.5.4, port=5060, connId=0 for UDP
001843: Nov 16 04:04:30.954: //-1/81111B728CF7/SIP/Info/sipSPIUaddCcbToUASReqTable: ****Adding to UAS Request table.
001844: Nov 16 04:04:30.954: //-1/81111B728CF7/SIP/Info/sipSPIUaddCcbToTable: Added to table. ccb=0x84EFF368 key=E8799A854B644C179790663F0AF881B60xc0a801713405da13d988ac2
001845: Nov 16 04:04:30.954: //-1/81111B728CF7/SIP/Event/ccsip_api_register_ind: CCSIP_REGISTER:: Registrar is not enabled
001846: Nov 16 04:04:30.954: //-1/81111B728CF7/SIP/Event/sact_idle_new_message_register:
ccsip_api_register_ind return value : SIP_SERVICE_UNAVAIL

001847: Nov 16 04:04:30.954: //-1/81111B728CF7/SIP/Transport/sipSPISendResponse: Sending INFO Response to the transport layer
001848: Nov 16 04:04:30.954: //-1/81111B728CF7/SIP/Transport/sipSPITransportSendMessage: msg=0x87528238, addr=192.168.5.4, port=5060, sentBy_port=5060, is_req=0, transport=1, switch=0, callBack=0x80D20C08
001849: Nov 16 04:04:30.954: //-1/81111B728CF7/SIP/Transport/sipSPITransportSendMessage: Proceedable for sending msg immediately
001850: Nov 16 04:04:30.954: //-1/81111B728CF7/SIP/Transport/sipTransportLogicSendMsg: switch transport is 0
001851: Nov 16 04:04:30.954: //-1/xxxxxxxxxxxx/SIP/Transport/sipTransportPostSendMessage: Posting send for msg=0x87528238, addr=192.168.5.4, port=5060, connId=0 for UDP
001852: Nov 16 04:04:30.954: //-1/81111B728CF7/SIP/State/sipSPIChangeState: 0x84EFF368 : State change from (STATE_IDLE, SUBSTATE_NONE) to (STATE_IDLE, SUBSTATE_NONE)
001853: Nov 16 04:04:30.954: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.5.4;branch=z9hG4bKc0a801710000004a491f9bd200000c4900000016;rport
From: "unknown" ;tag=5da13d988ac2
To:
Date: Sun, 16 Nov 2008 04:04:30 GMT
Call-ID: E8799A854B644C179790663F0AF881B60xc0a80171
Server: Cisco-SIPGateway/IOS-12.x
CSeq: 5 REGISTER
Content-Length: 0

001854: Nov 16 04:04:30.954: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 503 Service Unavailable - registrar unavail or not enabled
Via: SIP/2.0/UDP 192.168.5.4;branch=z9hG4bKc0a801710000004a491f9bd200000c4900000016;rport
From: "unknown" ;tag=5da13d988ac2
To: ;tag=3383F85C-201
Date: Sun, 16 Nov 2008 04:04:30 GMT
Call-ID: E8799A854B644C179790663F0AF881B60xc0a80171
Server: Cisco-SIPGateway/IOS-12.x
CSeq: 5 REGISTER
Content-Length: 0