Here is the SIP Trace:
213227mS RES: Tue 13/9/2011 11:38:27 FreeMem=71512780(2) CMMsg=2 (2) Buff=184 949 993 7447 5 Links=2848
213227mS RES2: IP 500 V2 6.1(5) Tasks=43 RTEngine=0 CMRTEngine=0 ExRTEngine=0 Timer=46 Poll=0 Ready=0 CMReady=0 CMQueue=0 VPNNQueue=0 Monitor=1 SSA=0 ASC=1 SYS=MNTD OPT=UMNT SDSPD=2034
213227mS PRN: 220: Digit Pressed 1
213228mS CMCallEvt: 0.1008.0 -1 BaseEP: NEW CMEndpoint f558307c TOTAL NOW=2 CALL_LIST=0
213229mS CMCallEvt: 0.1008.0 -1 Extn220.-1: NEW CMExtnEndpoint f558307c, Name=Extn220, Extn=220, Phys Extn=220
213229mS CMCallEvt: CREATE CALL:2 (f5582bdc)
213229mS CMCallEvt: 0.1009.0 -1 BaseEP: NEW CMEndpoint f558175c TOTAL NOW=3 CALL_LIST=0
213231mS CMExtnEvt: Extn220: CMExtnHandler::SetCurrent( id: 0->1008 )
213231mS CMExtnRx: v=220, p1=0
CMSetup
Line: type=DigitalExtn 2 Call: lid=0 id=1008 in=0
Called[] Type=Default (100) Reason=CMDRdirect Calling[220] Type=Internal Plan=Default
BC: CMTC=Speech CMTM=Circuit CMTR=64 CMST=Default CMU1=ALaw
IE CMIECallingPartyName (110)(Type=CMNameDefault) name=Extn220
213231mS CMCallEvt: 0.1008.0 2 Extn220.0: StateChange: END=A CMCSIdle->CMCSDialInitiated
213231mS CMExtnEvt: v=1 State, new=Dialling old=Idle,0,0,Extn220
213232mS CMTARGET: 0.1008.0 2 Extn220.0: LOOKUP CALL ROUTE: type=100 called_party= sub= calling=220 dir=out complete=0 ses=0
213232mS CMTARGET: 0.1008.0 2 Extn220.0: ADD TARGET (N): number= type=100 depth=1 nobar=1 setorig=1 ses=0
213232mS CMCallEvt: 0.1008.0 2 Extn220.0: StateChange: END=A CMCSDialInitiated->CMCSDialling
213233mS CMExtnTx: v=220, p1=0
CMSetupAck
Line: type=DigitalExtn 2 Call: lid=0 id=1008 in=0
BChan: slot=0 chan=1
Timed: 13/09/11 11:38
213233mS CMExtnRx: v=220, p1=0
CMInformation
Line: type=DigitalExtn 2 Call: lid=0 id=1008 in=0
Called[1] Type=Default (100) Reason=CMDRdirect
213234mS CD: CALL: 0.1008.0 BState=Idle Cut=0 Music=0.0 Aend="Extn220(220)" (0.1) Bend="" [] (0.0) CalledNum=1 () CallingNum=220 (Extn220) Internal=1 Time=5 AState=Dialling
213254mS SIP Reg/Opt Tx: 17
REGISTER sip:122.180.60.92 SIP/2.0
Via: SIP/2.0/UDP 178.78.114.173:5060;rport;branch=z9hG4bKbaed9301d76e380348491f660938c82d
From: <sip:London@122.180.60.92>;tag=2c70ff87f97ac095
To: <sip:London@122.180.60.92>
Call-ID: 26efbe84a86ea93f6608e61eb09ab3a0@178.78.114.173
CSeq: 1726214648 REGISTER
Contact: "Unknown" <sip:London@178.78.114.173:5060;transport=udp>
Expires: 3600
Max-Forwards: 70
User-Agent: IP Office 6.1 (5)
Supported: timer
Content-Length: 0
213254mS SIP Tx: UDP 178.78.114.173:5060 -> 122.180.60.92:5060
REGISTER sip:122.180.60.92 SIP/2.0
Via: SIP/2.0/UDP 178.78.114.173:5060;rport;branch=z9hG4bKbaed9301d76e380348491f660938c82d
From: <sip:London@122.180.60.92>;tag=2c70ff87f97ac095
To: <sip:London@122.180.60.92>
Call-ID: 26efbe84a86ea93f6608e61eb09ab3a0@178.78.114.173
CSeq: 1726214648 REGISTER
Contact: "Unknown" <sip:London@178.78.114.173:5060;transport=udp>
Expires: 3600
Max-Forwards: 70
User-Agent: IP Office 6.1 (5)
Supported: timer
Content-Length: 0
214179mS PRN: 220: Digit Pressed 1
214179mS CMExtnRx: v=220, p1=0
CMInformation
Line: type=DigitalExtn 2 Call: lid=0 id=1008 in=0
Called[1] Type=Default (100) Reason=CMDRdirect
215179mS CMTARGET: 0.1008.0 2 Extn220.0: TimerExpired cause=CMTCDelayedProcessing
215179mS CMTARGET: 0.1008.0 2 Extn220.0: LOOKUP CALL ROUTE: type=100 called_party=11 sub= calling=220 dir=out complete=0 ses=0
215179mS CMTARGET: 0.1008.0 2 Extn220.0: ADD TARGET (N): number=11 type=100 depth=1 nobar=1 setorig=1 ses=0
215207mS SIP Reg/Opt Tx: 17
OPTIONS sip:Unknown@122.180.60.92 SIP/2.0
Via: SIP/2.0/UDP 178.78.114.173:5060;rport;branch=z9hG4bK6b52108768f14477108f27d14bd53511
From: <sip:Unknown@122.180.60.92>;tag=6d6a88fe7a3315d8
To: <sip:Unknown@122.180.60.92>
Call-ID: 0a6148eb3aacb3119ce27ddf98081de6@178.78.114.173
CSeq: 1880229944 OPTIONS
Max-Forwards: 70
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, INFO, UPDATE
Supported: timer
Content-Length: 0
215207mS SIP Tx: UDP 178.78.114.173:5060 -> 122.180.60.92:5060
OPTIONS sip:Unknown@122.180.60.92 SIP/2.0
Via: SIP/2.0/UDP 178.78.114.173:5060;rport;branch=z9hG4bK6b52108768f14477108f27d14bd53511
From: <sip:Unknown@122.180.60.92>;tag=6d6a88fe7a3315d8
To: <sip:Unknown@122.180.60.92>
Call-ID: 0a6148eb3aacb3119ce27ddf98081de6@178.78.114.173
CSeq: 1880229944 OPTIONS
Max-Forwards: 70
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, INFO, UPDATE
Supported: timer
Content-Length: 0
215417mS PRN: 220: Digit Pressed 7
215417mS CMExtnRx: v=220, p1=0
CMInformation
Line: type=DigitalExtn 2 Call: lid=0 id=1008 in=0
Called[7] Type=Default (100) Reason=CMDRdirect
215417mS CMTARGET: 0.1008.0 2 Extn220.0: LOOKUP CALL ROUTE: type=100 called_party=117 sub= calling=220 dir=out complete=0 ses=0
215418mS CMTARGET: 0.1008.0 2 Extn220.0: ADD TARGET (N): number=117 type=100 depth=1 nobar=1 setorig=1 ses=0
215418mS CMTARGET: 0.1008.0 2 Extn220.0: SYS SC: 117 3 17 sc=type=Dial code=1XX, num=1N"@122.180.60.92" callinfop->sending_complete=0 secondary_dialtone=
215418mS CMARS: FindActiveARSByGroupID GroupID=10 - Not Found
215419mS CMLRQ: FindActiveLRQByGroupID GroupID=10 - Not Found
215419mS CMTARGET: Group Id: 10 has NOT been found in Line: 1
215419mS CMTARGET: Group Id: 10 has NOT been found in Line: 2
215419mS CMTARGET: Group Id: 10 has NOT been found in Line: 5
215419mS CMTARGET: Group Id: 10 has NOT been found in Line: 6
215419mS CMTARGET: Problem with Line Id: 17 - check_DNS 1 OperationalTest: 0, IP address: 122.180.60.92
215420mS CMTARGET: DIAL LINE: 2 GROUP = 10 SUCCESS = 00000000
215420mS CMTARGET: 0.1008.0 2 Extn220.0: CancelTimer CMTCDialToneTimeout
215421mS CMLOGGING: CALL:2011/09/1311:38,00:00:00,000,220,O,117,117,Extn220,,,1,,""n/a,0
215421mS CD: CALL: 0.1008.0 BState=Idle Cut=0 Music=0.0 Aend="Extn220(220)" (0.1) Bend="" [] (0.0) CalledNum=117 () CallingNum=220 (Extn220) Internal=1 Time=2192 AState=Dialling
215421mS CD: CALL: 0.1008.0 Deleted
215422mS CMExtnEvt: Extn220: CALL LOST (CMCauseNoChannel)
215422mS CMExtnEvt: Extn220: Extn(220) Calling Party Number(220) Type(CMNTypeInternal)
215422mS CMCallEvt: 0.1008.0 -1 Extn220.0: StateChange: END=X CMCSDialling->CMCSCompletedTone
215422mS CMExtnEvt: v=1 State, new=CMESCompleted old=Dialling,0,0,Extn220
215423mS CMCallEvt: 0.1009.0 -1 BaseEP: DELETE CMEndpoint f558175c TOTAL NOW=2 CALL_LIST=0
215423mS CMCallEvt: END CALL:2 (f5582bdc)
215425mS CMMap: a=0.1 b=0.0 B2
215800mS CMMap: a=0.1 b=0.0 B0
216175mS CMMap: a=0.1 b=0.0 B2
216550mS CMMap: a=0.1 b=0.0 B0
216925mS CMMap: a=0.1 b=0.0 B2
217300mS CMMap: a=0.1 b=0.0 B0
217675mS CMMap: a=0.1 b=0.0 B2
218050mS CMMap: a=0.1 b=0.0 B0
218425mS CMMap: a=0.1 b=0.0 B2
218800mS CMMap: a=0.1 b=0.0 B0
219175mS CMMap: a=0.1 b=0.0 B2
219208mS SIP Reg/Opt Tx: 17
OPTIONS sip:Unknown@122.180.60.92 SIP/2.0
Via: SIP/2.0/UDP 178.78.114.173:5060;rport;branch=z9hG4bK6b52108768f14477108f27d14bd53511
From: <sip:Unknown@122.180.60.92>;tag=6d6a88fe7a3315d8
To: <sip:Unknown@122.180.60.92>
Call-ID: 0a6148eb3aacb3119ce27ddf98081de6@178.78.114.173
CSeq: 1880229944 OPTIONS
Max-Forwards: 70
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, INFO, UPDATE
Supported: timer
Content-Length: 0
219208mS SIP Tx: UDP 178.78.114.173:5060 -> 122.180.60.92:5060
OPTIONS sip:Unknown@122.180.60.92 SIP/2.0
Via: SIP/2.0/UDP 178.78.114.173:5060;rport;branch=z9hG4bK6b52108768f14477108f27d14bd53511
From: <sip:Unknown@122.180.60.92>;tag=6d6a88fe7a3315d8
To: <sip:Unknown@122.180.60.92>
Call-ID: 0a6148eb3aacb3119ce27ddf98081de6@178.78.114.173
CSeq: 1880229944 OPTIONS
Max-Forwards: 70
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, INFO, UPDATE
Supported: timer
Content-Length: 0
219550mS CMMap: a=0.1 b=0.0 B0
219925mS CMMap: a=0.1 b=0.0 B2
220300mS CMMap: a=0.1 b=0.0 B0
220675mS CMMap: a=0.1 b=0.0 B2
221050mS CMMap: a=0.1 b=0.0 B0