#
U 203.167.190.62:54678 -> 60.234.71.19:5060
  INVITE sip:4370@60.234.71.19:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.1.42:5060;branch=z9hG4bK7BBBCE..From: <sip:6001@192.168.1.252>;tag=365BDC8-575..To: <
  sip:4370@60.234.71.19>..Date: Sat, 01 Jan 2000 15:49:54 GMT..Call-ID: ECA258FF-BF9911D3-87B2BB0C-C67A6449@192.168.1.42..Supported: 100rel,timer,resource-
  priority,replaces..Min-SE:  1800..Cisco-Guid: 3946062707-3214479827-2276309772-3329909833..User-Agent: Cisco-SIPGateway/IOS-12.x..Allow: INVITE, OPTIONS,
   BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER..CSeq: 103 INVITE..Max-Forwards: 70..Timestamp: 946741794..Contact: <sip:6001@
  192.168.1.42:5060>..Expires: 180..Allow-Events: telephone-event..Authorization: Digest username="office",realm="asterisk",uri="sip:4370@60.234.71.19:5060
  ",response="29b1a1f07c66a6b6cc6a6dfb7cf0a4de",nonce="6f9aed41",algorithm=MD5..Content-Type: application/sdp..Content-Disposition: session;handling=requir
  ed..Content-Length: 306....v=0..o=CiscoSystemsSIP-GW-UserAgent 7252 8186 IN IP4 192.168.1.42..s=SIP Call..c=IN IP4 192.168.1.42..t=0 0..m=audio 24570 RTP
  /AVP 18 0 8 101..c=IN IP4 192.168.1.42..a=rtpmap:18 G729/8000..a=fmtp:18 annexb=no..a=rtpmap:0 PCMU/8000..a=rtpmap:8 PCMA/8000..a=rtpmap:101 telephone-ev
  ent/8000..a=fmtp:101 0-16..
#
U 60.234.71.19:5060 -> 203.167.190.62:54678
  SIP/2.0 100 Trying..v: SIP/2.0/UDP 60.234.71.19:5060;branch=z9hG4bK7BBBCE;received=203.167.190.62..f: <sip:6001@192.168.1.252>;tag=365BDC8-575..t: <sip:4
  370@60.234.71.19>..i: ECA258FF-BF9911D3-87B2BB0C-C67A6449@192.168.1.42..CSeq: 103 INVITE..User-Agent: Asterisk PBX..Allow: INVITE, ACK, CANCEL, OPTIONS,
  BYE, REFER, SUBSCRIBE, NOTIFY..k: replaces..m: <sip:4370@60.234.71.19>..l: 0....
#
U 60.234.71.19:5060 -> 203.167.190.62:54678
  SIP/2.0 180 Ringing..v: SIP/2.0/UDP 60.234.71.19:5060;branch=z9hG4bK7BBBCE;received=203.167.190.62..f: <sip:6001@192.168.1.252>;tag=365BDC8-575..t: <sip:
  4370@60.234.71.19>;tag=as3d25af62..i: ECA258FF-BF9911D3-87B2BB0C-C67A6449@192.168.1.42..CSeq: 103 INVITE..User-Agent: Asterisk PBX..Allow: INVITE, ACK, C
  ANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..k: replaces..m: <sip:4370@60.234.71.19>..l: 0....
#
U 60.234.71.19:5060 -> 203.167.190.62:54678
  SIP/2.0 200 OK..v: SIP/2.0/UDP 60.234.71.19:5060;branch=z9hG4bK7BBBCE;received=203.167.190.62..f: <sip:6001@192.168.1.252>;tag=365BDC8-575..t: <sip:4370@
  60.234.71.19>;tag=as3d25af62..i: ECA258FF-BF9911D3-87B2BB0C-C67A6449@192.168.1.42..CSeq: 103 INVITE..User-Agent: Asterisk PBX..Allow: INVITE, ACK, CANCEL
  , OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..k: replaces..m: <sip:4370@60.234.71.19>..c: application/sdp..l: 249....v=0..o=root 2269 2269 IN IP4 60.234.71.1
  9..s=session..c=IN IP4 60.234.71.19..t=0 0..m=audio 18604 RTP/AVP 18 101..a=rtpmap:18 G729/8000..a=fmtp:18 annexb=no..a=rtpmap:101 telephone-event/8000..
  a=fmtp:101 0-16..a=silenceSupp:off - - - -..a=sendrecv..
#
U 203.167.190.62:54678 -> 60.234.71.19:5060
  ACK sip:4370@60.234.71.19:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.1.42:5060;branch=z9hG4bK7BC745..From: <sip:6001@192.168.1.252>;tag=365BDC8-575..To: <sip
  :4370@60.234.71.19>;tag=as3d25af62..Date: Sat, 01 Jan 2000 15:49:54 GMT..Call-ID: ECA258FF-BF9911D3-87B2BB0C-C67A6449@192.168.1.42..Max-Forwards: 70..CSe
  q: 103 ACK..Authorization: Digest username="office",realm="asterisk",uri="sip:4370@60.234.71.19:5060",response="29b1a1f07c66a6b6cc6a6dfb7cf0a4de",nonce="
  6f9aed41",algorithm=MD5..Allow-Events: telephone-event..Content-Length: 0....







U 203.167.190.62:54678 -> 60.234.71.19:5060
  BYE sip:4370@60.234.71.19:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.1.42:5060;branch=z9hG4bK7BD1271..From: <sip:6001@192.168.1.252>;tag=365BDC8-575..To: <si
  p:4370@60.234.71.19>;tag=as3d25af62..Date: Sat, 01 Jan 2000 15:49:54 GMT..Call-ID: ECA258FF-BF9911D3-87B2BB0C-C67A6449@192.168.1.42..User-Agent: Cisco-SI
  PGateway/IOS-12.x..Max-Forwards: 70..Timestamp: 946741809..CSeq: 104 BYE..Authorization: Digest username="office",realm="asterisk",uri="sip:4370@60.234.7
  1.19:5060",response="b04b07334e0e2393f0ecea1d06ef4272",nonce="6f9aed41",algorithm=MD5..Reason: Q.850;cause=16..Content-Length: 0....
#
U 60.234.71.19:5060 -> 203.167.190.62:54678
  SIP/2.0 200 OK..v: SIP/2.0/UDP 60.234.71.19:5060;branch=z9hG4bK7BD1271;received=203.167.190.62..f: <sip:6001@192.168.1.252>;tag=365BDC8-575..t: <sip:4370
  @60.234.71.19>;tag=as3d25af62..i: ECA258FF-BF9911D3-87B2BB0C-C67A6449@192.168.1.42..CSeq: 104 BYE..User-Agent: Asterisk PBX..Allow: INVITE, ACK, CANCEL,
  OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..k: replaces..m: <sip:4370@60.234.71.19>..l: 0....