#
U 192.168.30.191:5060 -> 192.168.30.254:5060
  INVITE sip:6002@192.168.30.254:5060;user=phone SIP/2.0..Via: SIP/2.0/UDP 19
  2.168.30.191:5060;branch=z9hG4bKcf992da27A6EF0D9..From: "6011" <sip:6011@19
  2.168.30.254>;tag=E28D801D-CE25B318..To: <sip:6002@192.168.30.254;user=phon
  e>..CSeq: 1 INVITE..Call-ID: 3da894a4-7e6157f3-7be40cf6@192.168.30.191..Con
  tact: <sip:6011@192.168.30.191:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTI
  ONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: Po
  lycomSoundStationIP-SPIP_4000-UA/3.1.1.0137..Accept-Language: en..Supported
  : 100rel,replaces..Allow-Events: talk,hold,conference..Max-Forwards: 70..Co
  ntent-Type: application/sdp..Content-Length: 215....v=0..o=- 1233159201 123
  3159201 IN IP4 192.168.30.191..s=Polycom IP Phone..c=IN IP4 192.168.30.191.
  .t=0 0..m=audio 2228 RTP/AVP 0 8 101..a=rtpmap:0 PCMU/8000..a=rtpmap:8 PCMA
  /8000..a=rtpmap:101 telephone-event/8000..
#
U 192.168.30.254:5060 -> 192.168.30.191:5060
  SIP/2.0 407 Proxy Authentication Required..Via: SIP/2.0/UDP 192.168.30.191:
  5060;branch=z9hG4bKcf992da27A6EF0D9;received=192.168.30.191..From: "6011" <
  sip:6011@192.168.30.254>;tag=E28D801D-CE25B318..To: <sip:6002@192.168.30.25
  4;user=phone>;tag=as7a646c38..Call-ID: 3da894a4-7e6157f3-7be40cf6@192.168.3
  0.191..CSeq: 1 INVITE..User-Agent: Asterisk PBX (Fireworx)..Allow: INVITE,
  ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..P
  roxy-Authenticate: Digest algorithm=MD5, realm="fireworx", nonce="5105e481"
  ..Content-Length: 0....
#
U 192.168.30.191:5060 -> 192.168.30.254:5060
  ACK sip:6002@192.168.30.254:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.191:5
  060;branch=z9hG4bKcf992da27A6EF0D9..From: "6011" <sip:6011@192.168.30.254>;
  tag=E28D801D-CE25B318..To: <sip:6002@192.168.30.254;user=phone>;tag=as7a646
  c38..CSeq: 1 ACK..Call-ID: 3da894a4-7e6157f3-7be40cf6@192.168.30.191..Conta
  ct: <sip:6011@192.168.30.191:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTION
  S, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: Poly
  comSoundStationIP-SPIP_4000-UA/3.1.1.0137..Accept-Language: en..Max-Forward
  s: 70..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.1.2:5060
  OPTIONS sip:192.168.1.2;user=phone SIP/2.0..Via: SIP/2.0/UDP 192.168.30.254
  :5060;branch=z9hG4bK4e7fe8e3;rport..From: "asterisk" <sip:asterisk@192.168.
  30.254>;tag=as78fbbbd3..To: <sip:192.168.1.2;user=phone>..Contact: <sip:ast
  erisk@192.168.30.254>..Call-ID: 762952847863a6a73ab1ef931326dcb4@192.168.30
  .254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwards:
   70..Date: Wed, 28 Jan 2009 16:13:33 GMT..Allow: INVITE, ACK, CANCEL, OPTIO
  NS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length: 0..
  ..
#
U 192.168.30.191:5060 -> 192.168.30.254:5060
  INVITE sip:6002@192.168.30.254:5060;user=phone SIP/2.0..Via: SIP/2.0/UDP 19
  2.168.30.191:5060;branch=z9hG4bKcb79dbd7118578A..From: "6011" <sip:6011@192
  .168.30.254>;tag=E28D801D-CE25B318..To: <sip:6002@192.168.30.254;user=phone
  >..CSeq: 2 INVITE..Call-ID: 3da894a4-7e6157f3-7be40cf6@192.168.30.191..Cont
  act: <sip:6011@192.168.30.191:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTIO
  NS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: Pol
  ycomSoundStationIP-SPIP_4000-UA/3.1.1.0137..Accept-Language: en..Supported:
   100rel,replaces..Allow-Events: talk,hold,conference..Proxy-Authorization:
  Digest username="6011", realm="fireworx", nonce="5105e481", uri="sip:6002@1
  92.168.30.254:5060;user=phone", response="89fdcf37581dc9bf59d9bfc1e6a4aab0"
  , algorithm=MD5..Max-Forwards: 70..Content-Type: application/sdp..Content-L
  ength: 215....v=0..o=- 1233159201 1233159201 IN IP4 192.168.30.191..s=Polyc
  om IP Phone..c=IN IP4 192.168.30.191..t=0 0..m=audio 2228 RTP/AVP 0 8 101..
  a=rtpmap:0 PCMU/8000..a=rtpmap:8 PCMA/8000..a=rtpmap:101 telephone-event/80
  00..
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  NOTIFY sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK5f7528d0;rport..From: <sip:6011@192.168.30.254>;tag=as
  566d9104..To: "David Brillert" <sip:6010@192.168.30.254>;tag=ED4B3756-3015E
  4A7..Contact: <sip:6011@192.168.30.254>..Call-ID: 78b3bddb-c51d74e0-938a879
  9@192.168.30.194..CSeq: 103 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 353....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6010@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6011">.<address uri="sip:6011@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="inuse" />.<msnsubstatus substatus="onthephone" />.</addre
  ss>.</atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.191:5060
  SIP/2.0 100 Trying..Via: SIP/2.0/UDP 192.168.30.191:5060;branch=z9hG4bKcb79
  dbd7118578A;received=192.168.30.191..From: "6011" <sip:6011@192.168.30.254>
  ;tag=E28D801D-CE25B318..To: <sip:6002@192.168.30.254;user=phone>..Call-ID:
  3da894a4-7e6157f3-7be40cf6@192.168.30.191..CSeq: 2 INVITE..User-Agent: Aste
  risk PBX (Fireworx)..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSC
  RIBE, NOTIFY..Supported: replaces..Contact: <sip:6002@192.168.30.254>..Cont
  ent-Length: 0....
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK5f7528d0
  ;rport..From: <sip:6011@192.168.30.254>;tag=as566d9104..To: "David Brillert
  " <sip:6010@192.168.30.254>;tag=ED4B3756-3015E4A7..CSeq: 103 NOTIFY..Call-I
  D: 78b3bddb-c51d74e0-938a8799@192.168.30.194..Contact: <sip:6010@192.168.30
  .194:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  NOTIFY sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK5d491fdc;rport..From: <sip:6002@192.168.30.254>;tag=as
  4ba16def..To: "David Brillert" <sip:6010@192.168.30.254>;tag=CBC527FD-CBF0D
  1CA..Contact: <sip:6002@192.168.30.254>..Call-ID: 7c02b12e-7ca388df-c9a4187
  4@192.168.30.194..CSeq: 103 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 353....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6010@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6002">.<address uri="sip:6002@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="inuse" />.<msnsubstatus substatus="onthephone" />.</addre
  ss>.</atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  NOTIFY sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK30ec4b54;rport..From: <sip:6002@192.168.30.254>;tag=as
  64d9d186..To: "Reception 6002" <sip:6002@192.168.30.254>;tag=C4303C28-E9827
  A59..Contact: <sip:6002@192.168.30.254>..Call-ID: 3f88365-d8decdee-a7a8c16f
  @192.168.30.190..CSeq: 182 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Max
  -Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subscr
  iption-State: active..Content-Length: 353....<?xml version="1.0"?>.<!DOCTYP
  E presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<presen
  ce>.<presentity uri="sip:6002@192.168.30.254;method=SUBSCRIBE" />.<atom id=
  "6002">.<address uri="sip:6002@192.168.30.254;user=ip" priority="0.800000">
  .<status status="inuse" />.<msnsubstatus substatus="onthephone" />.</addres
  s>.</atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  INVITE sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK511cea20;rport..From: "6011" <sip:6011@192.168.30.254>
  ;tag=as4c78709b..To: <sip:6002@192.168.30.190:5060>..Contact: <sip:6011@192
  .168.30.254>..Call-ID: 6767ca5d6b54a9305af572e07a276207@192.168.30.254..CSe
  q: 102 INVITE..User-Agent: Asterisk PBX (Fireworx)..Max-Forwards: 70..Remot
  e-Party-ID: "6011" <sip:6011@192.168.30.254>;privacy=off;screen=no..Date: W
  ed, 28 Jan 2009 16:13:35 GMT..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REF
  ER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Type: application/sdp..
  Content-Length: 240....v=0..o=root 319 319 IN IP4 192.168.30.254..s=session
  ..c=IN IP4 192.168.30.254..t=0 0..m=audio 10964 RTP/AVP 0 101..a=rtpmap:0 P
  CMU/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101 0-16..a=silenceSupp
  :off - - - -..a=ptime:20..a=sendrecv..
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK30ec4b54
  ;rport..From: <sip:6002@192.168.30.254>;tag=as64d9d186..To: "Reception 6002
  " <sip:6002@192.168.30.254>;tag=C4303C28-E9827A59..CSeq: 182 NOTIFY..Call-I
  D: 3f88365-d8decdee-a7a8c16f@192.168.30.190..Contact: <sip:6002@192.168.30.
  190:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_650-UA/3.1
  .1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK5d491fdc
  ;rport..From: <sip:6002@192.168.30.254>;tag=as4ba16def..To: "David Brillert
  " <sip:6010@192.168.30.254>;tag=CBC527FD-CBF0D1CA..CSeq: 103 NOTIFY..Call-I
  D: 7c02b12e-7ca388df-c9a41874@192.168.30.194..Contact: <sip:6010@192.168.30
  .194:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 100 Trying..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK511c
  ea20;rport..From: "6011" <sip:6011@192.168.30.254>;tag=as4c78709b..To: <sip
  :6002@192.168.30.190:5060>;tag=668CC2DC-D7B946D..CSeq: 102 INVITE..Call-ID:
   6767ca5d6b54a9305af572e07a276207@192.168.30.254..Contact: <sip:6002@192.16
  8.30.190:5060>..User-Agent: PolycomSoundPointIP-SPIP_650-UA/3.1.1.0137..Acc
  ept-Language: en..Content-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 180 Ringing..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK511
  cea20;rport..From: "6011" <sip:6011@192.168.30.254>;tag=as4c78709b..To: <si
  p:6002@192.168.30.190:5060>;tag=668CC2DC-D7B946D..CSeq: 102 INVITE..Call-ID
  : 6767ca5d6b54a9305af572e07a276207@192.168.30.254..Contact: <sip:6002@192.1
  68.30.190:5060>..User-Agent: PolycomSoundPointIP-SPIP_650-UA/3.1.1.0137..Al
  low-Events: talk,hold,conference..Accept-Language: en..Content-Length: 0...
  .
#
U 192.168.30.254:5060 -> 192.168.30.191:5060
  SIP/2.0 180 Ringing..Via: SIP/2.0/UDP 192.168.30.191:5060;branch=z9hG4bKcb7
  9dbd7118578A;received=192.168.30.191..From: "6011" <sip:6011@192.168.30.254
  >;tag=E28D801D-CE25B318..To: <sip:6002@192.168.30.254;user=phone>;tag=as402
  219bd..Call-ID: 3da894a4-7e6157f3-7be40cf6@192.168.30.191..CSeq: 2 INVITE..
  User-Agent: Asterisk PBX (Fireworx)..Allow: INVITE, ACK, CANCEL, OPTIONS, B
  YE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Contact: <sip:6002@192.1
  68.30.254>..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.1.2:5060
  OPTIONS sip:192.168.1.2;user=phone SIP/2.0..Via: SIP/2.0/UDP 192.168.30.254
  :5060;branch=z9hG4bK4e7fe8e3;rport..From: "asterisk" <sip:asterisk@192.168.
  30.254>;tag=as78fbbbd3..To: <sip:192.168.1.2;user=phone>..Contact: <sip:ast
  erisk@192.168.30.254>..Call-ID: 762952847863a6a73ab1ef931326dcb4@192.168.30
  .254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwards:
   70..Date: Wed, 28 Jan 2009 16:13:33 GMT..Allow: INVITE, ACK, CANCEL, OPTIO
  NS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length: 0..
  ..
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK511cea20
  ;rport..From: "6011" <sip:6011@192.168.30.254>;tag=as4c78709b..To: <sip:600
  2@192.168.30.190:5060>;tag=668CC2DC-D7B946D..CSeq: 102 INVITE..Call-ID: 676
  7ca5d6b54a9305af572e07a276207@192.168.30.254..Contact: <sip:6002@192.168.30
  .190:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCR
  IBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: PolycomSoundPointIP-SPIP_650
  -UA/3.1.1.0137..Accept-Language: en..Content-Type: application/sdp..Content
  -Length: 203....v=0..o=- 1233159210 1233159210 IN IP4 192.168.30.190..s=Pol
  ycom IP Phone..c=IN IP4 192.168.30.190..t=0 0..m=audio 2232 RTP/AVP 0 101..
  a=sendrecv..a=rtpmap:0 PCMU/8000..a=rtpmap:101 telephone-event/8000..
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  ACK sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.254:5
  060;branch=z9hG4bK000eaa20;rport..From: "6011" <sip:6011@192.168.30.254>;ta
  g=as4c78709b..To: <sip:6002@192.168.30.190:5060>;tag=668CC2DC-D7B946D..Cont
  act: <sip:6011@192.168.30.254>..Call-ID: 6767ca5d6b54a9305af572e07a276207@1
  92.168.30.254..CSeq: 102 ACK..User-Agent: Asterisk PBX (Fireworx)..Max-Forw
  ards: 70..Remote-Party-ID: "6011" <sip:6011@192.168.30.254>;privacy=off;scr
  een=no..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  NOTIFY sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK7d5218b7;rport..From: <sip:6002@192.168.30.254>;tag=as
  4ba16def..To: "David Brillert" <sip:6010@192.168.30.254>;tag=CBC527FD-CBF0D
  1CA..Contact: <sip:6002@192.168.30.254>..Call-ID: 7c02b12e-7ca388df-c9a4187
  4@192.168.30.194..CSeq: 104 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 353....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6010@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6002">.<address uri="sip:6002@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="inuse" />.<msnsubstatus substatus="onthephone" />.</addre
  ss>.</atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  NOTIFY sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK36d5f497;rport..From: <sip:6002@192.168.30.254>;tag=as
  64d9d186..To: "Reception 6002" <sip:6002@192.168.30.254>;tag=C4303C28-E9827
  A59..Contact: <sip:6002@192.168.30.254>..Call-ID: 3f88365-d8decdee-a7a8c16f
  @192.168.30.190..CSeq: 183 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Max
  -Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subscr
  iption-State: active..Content-Length: 353....<?xml version="1.0"?>.<!DOCTYP
  E presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<presen
  ce>.<presentity uri="sip:6002@192.168.30.254;method=SUBSCRIBE" />.<atom id=
  "6002">.<address uri="sip:6002@192.168.30.254;user=ip" priority="0.800000">
  .<status status="inuse" />.<msnsubstatus substatus="onthephone" />.</addres
  s>.</atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.191:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.191:5060;branch=z9hG4bKcb79dbd7
  118578A;received=192.168.30.191..From: "6011" <sip:6011@192.168.30.254>;tag
  =E28D801D-CE25B318..To: <sip:6002@192.168.30.254;user=phone>;tag=as402219bd
  ..Call-ID: 3da894a4-7e6157f3-7be40cf6@192.168.30.191..CSeq: 2 INVITE..User-
  Agent: Asterisk PBX (Fireworx)..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, R
  EFER, SUBSCRIBE, NOTIFY..Supported: replaces..Contact: <sip:6002@192.168.30
  .254>..Content-Type: application/sdp..Content-Length: 240....v=0..o=root 31
  9 319 IN IP4 192.168.30.254..s=session..c=IN IP4 192.168.30.254..t=0 0..m=a
  udio 11856 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:101 telephone-even
  t/8000..a=fmtp:101 0-16..a=silenceSupp:off - - - -..a=ptime:20..a=sendrecv.
  .
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK7d5218b7
  ;rport..From: <sip:6002@192.168.30.254>;tag=as4ba16def..To: "David Brillert
  " <sip:6010@192.168.30.254>;tag=CBC527FD-CBF0D1CA..CSeq: 104 NOTIFY..Call-I
  D: 7c02b12e-7ca388df-c9a41874@192.168.30.194..Contact: <sip:6010@192.168.30
  .194:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK36d5f497
  ;rport..From: <sip:6002@192.168.30.254>;tag=as64d9d186..To: "Reception 6002
  " <sip:6002@192.168.30.254>;tag=C4303C28-E9827A59..CSeq: 183 NOTIFY..Call-I
  D: 3f88365-d8decdee-a7a8c16f@192.168.30.190..Contact: <sip:6002@192.168.30.
  190:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_650-UA/3.1
  .1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.191:5060 -> 192.168.30.254:5060
  ACK sip:6002@192.168.30.254 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.191:5060;b
  ranch=z9hG4bKbfb24bfbEB39215E..From: "6011" <sip:6011@192.168.30.254>;tag=E
  28D801D-CE25B318..To: <sip:6002@192.168.30.254;user=phone>;tag=as402219bd..
  CSeq: 2 ACK..Call-ID: 3da894a4-7e6157f3-7be40cf6@192.168.30.191..Contact: <
  sip:6011@192.168.30.191:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, IN
  FO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: PolycomSo
  undStationIP-SPIP_4000-UA/3.1.1.0137..Accept-Language: en..Max-Forwards: 70
  ..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.1.2:5060
  OPTIONS sip:192.168.1.2;user=phone SIP/2.0..Via: SIP/2.0/UDP 192.168.30.254
  :5060;branch=z9hG4bK4e7fe8e3;rport..From: "asterisk" <sip:asterisk@192.168.
  30.254>;tag=as78fbbbd3..To: <sip:192.168.1.2;user=phone>..Contact: <sip:ast
  erisk@192.168.30.254>..Call-ID: 762952847863a6a73ab1ef931326dcb4@192.168.30
  .254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwards:
   70..Date: Wed, 28 Jan 2009 16:13:33 GMT..Allow: INVITE, ACK, CANCEL, OPTIO
  NS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length: 0..
  ..
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  INVITE sip:6011@192.168.30.254 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.190:506
  0;branch=z9hG4bKceaeb0b6131897F7..From: <sip:6002@192.168.30.190:5060>;tag=
  668CC2DC-D7B946D..To: "6011" <sip:6011@192.168.30.254>;tag=as4c78709b..CSeq
  : 1 INVITE..Call-ID: 6767ca5d6b54a9305af572e07a276207@192.168.30.254..Conta
  ct: <sip:6002@192.168.30.190:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTION
  S, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: Poly
  comSoundPointIP-SPIP_650-UA/3.1.1.0137..Accept-Language: en..Supported: 100
  rel,replaces..Allow-Events: talk,hold,conference..Max-Forwards: 70..Content
  -Type: application/sdp..Content-Length: 203....v=0..o=- 1233159210 12331592
  11 IN IP4 192.168.30.190..s=Polycom IP Phone..c=IN IP4 192.168.30.190..t=0
  0..a=inactive..m=audio 2232 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:1
  01 telephone-event/8000..
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  SIP/2.0 100 Trying..Via: SIP/2.0/UDP 192.168.30.190:5060;branch=z9hG4bKceae
  b0b6131897F7;received=192.168.30.190..From: <sip:6002@192.168.30.190:5060>;
  tag=668CC2DC-D7B946D..To: "6011" <sip:6011@192.168.30.254>;tag=as4c78709b..
  Call-ID: 6767ca5d6b54a9305af572e07a276207@192.168.30.254..CSeq: 1 INVITE..U
  ser-Agent: Asterisk PBX (Fireworx)..Allow: INVITE, ACK, CANCEL, OPTIONS, BY
  E, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Contact: <sip:6011@192.16
  8.30.254>..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.190:5060;branch=z9hG4bKceaeb0b6
  131897F7;received=192.168.30.190..From: <sip:6002@192.168.30.190:5060>;tag=
  668CC2DC-D7B946D..To: "6011" <sip:6011@192.168.30.254>;tag=as4c78709b..Call
  -ID: 6767ca5d6b54a9305af572e07a276207@192.168.30.254..CSeq: 1 INVITE..User-
  Agent: Asterisk PBX (Fireworx)..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, R
  EFER, SUBSCRIBE, NOTIFY..Supported: replaces..Contact: <sip:6011@192.168.30
  .254>..Content-Type: application/sdp..Content-Length: 240....v=0..o=root 31
  9 320 IN IP4 192.168.30.254..s=session..c=IN IP4 192.168.30.254..t=0 0..m=a
  udio 10964 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:101 telephone-even
  t/8000..a=fmtp:101 0-16..a=silenceSupp:off - - - -..a=ptime:20..a=inactive.
  .
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  NOTIFY sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK12363479;rport..From: <sip:6002@192.168.30.254>;tag=as
  4ba16def..To: "David Brillert" <sip:6010@192.168.30.254>;tag=CBC527FD-CBF0D
  1CA..Contact: <sip:6002@192.168.30.254>..Call-ID: 7c02b12e-7ca388df-c9a4187
  4@192.168.30.194..CSeq: 105 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 351....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6010@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6002">.<address uri="sip:6002@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="closed" />.<msnsubstatus substatus="offline" />.</address
  >.</atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  NOTIFY sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK739275c4;rport..From: <sip:6002@192.168.30.254>;tag=as
  64d9d186..To: "Reception 6002" <sip:6002@192.168.30.254>;tag=C4303C28-E9827
  A59..Contact: <sip:6002@192.168.30.254>..Call-ID: 3f88365-d8decdee-a7a8c16f
  @192.168.30.190..CSeq: 184 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Max
  -Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subscr
  iption-State: active..Content-Length: 351....<?xml version="1.0"?>.<!DOCTYP
  E presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<presen
  ce>.<presentity uri="sip:6002@192.168.30.254;method=SUBSCRIBE" />.<atom id=
  "6002">.<address uri="sip:6002@192.168.30.254;user=ip" priority="0.800000">
  .<status status="closed" />.<msnsubstatus substatus="offline" />.</address>
  .</atom>.</presence>.
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK12363479
  ;rport..From: <sip:6002@192.168.30.254>;tag=as4ba16def..To: "David Brillert
  " <sip:6010@192.168.30.254>;tag=CBC527FD-CBF0D1CA..CSeq: 105 NOTIFY..Call-I
  D: 7c02b12e-7ca388df-c9a41874@192.168.30.194..Contact: <sip:6010@192.168.30
  .194:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  ACK sip:6011@192.168.30.254 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.190:5060;b
  ranch=z9hG4bK55a898708981DE61..From: <sip:6002@192.168.30.190:5060>;tag=668
  CC2DC-D7B946D..To: "6011" <sip:6011@192.168.30.254>;tag=as4c78709b..CSeq: 1
   ACK..Call-ID: 6767ca5d6b54a9305af572e07a276207@192.168.30.254..Contact: <s
  ip:6002@192.168.30.190:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INF
  O, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: PolycomSou
  ndPointIP-SPIP_650-UA/3.1.1.0137..Accept-Language: en..Max-Forwards: 70..Co
  ntent-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK739275c4
  ;rport..From: <sip:6002@192.168.30.254>;tag=as64d9d186..To: "Reception 6002
  " <sip:6002@192.168.30.254>;tag=C4303C28-E9827A59..CSeq: 184 NOTIFY..Call-I
  D: 3f88365-d8decdee-a7a8c16f@192.168.30.190..Contact: <sip:6002@192.168.30.
  190:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_650-UA/3.1
  .1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  INVITE sip:6010@192.168.30.254:5060;user=phone SIP/2.0..Via: SIP/2.0/UDP 19
  2.168.30.190:5060;branch=z9hG4bKd40f21ab59355D84..From: "Reception 6002" <s
  ip:6002@192.168.30.254>;tag=822DE218-D1123CC9..To: <sip:6010@192.168.30.254
  ;user=phone>..CSeq: 1 INVITE..Call-ID: 7e9bfbd5-1531eede-63f1e6df@192.168.3
  0.190..Contact: <sip:6002@192.168.30.190:5060>..Allow: INVITE, ACK, BYE, CA
  NCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User
  -Agent: PolycomSoundPointIP-SPIP_650-UA/3.1.1.0137..Accept-Language: en..Su
  pported: 100rel,replaces..Allow-Events: talk,hold,conference..Max-Forwards:
   70..Content-Type: application/sdp..Content-Length: 215....v=0..o=- 1233159
  215 1233159215 IN IP4 192.168.30.190..s=Polycom IP Phone..c=IN IP4 192.168.
  30.190..t=0 0..m=audio 2236 RTP/AVP 0 8 101..a=rtpmap:0 PCMU/8000..a=rtpmap
  :8 PCMA/8000..a=rtpmap:101 telephone-event/8000..
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  SIP/2.0 407 Proxy Authentication Required..Via: SIP/2.0/UDP 192.168.30.190:
  5060;branch=z9hG4bKd40f21ab59355D84;received=192.168.30.190..From: "Recepti
  on 6002" <sip:6002@192.168.30.254>;tag=822DE218-D1123CC9..To: <sip:6010@192
  .168.30.254;user=phone>;tag=as4816fc7c..Call-ID: 7e9bfbd5-1531eede-63f1e6df
  @192.168.30.190..CSeq: 1 INVITE..User-Agent: Asterisk PBX (Fireworx)..Allow
  : INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: r
  eplaces..Proxy-Authenticate: Digest algorithm=MD5, realm="fireworx", nonce=
  "0e0e3185"..Content-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  ACK sip:6010@192.168.30.254:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.190:5
  060;branch=z9hG4bKd40f21ab59355D84..From: "Reception 6002" <sip:6002@192.16
  8.30.254>;tag=822DE218-D1123CC9..To: <sip:6010@192.168.30.254;user=phone>;t
  ag=as4816fc7c..CSeq: 1 ACK..Call-ID: 7e9bfbd5-1531eede-63f1e6df@192.168.30.
  190..Contact: <sip:6002@192.168.30.190:5060>..Allow: INVITE, ACK, BYE, CANC
  EL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-A
  gent: PolycomSoundPointIP-SPIP_650-UA/3.1.1.0137..Accept-Language: en..Max-
  Forwards: 70..Content-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  INVITE sip:6010@192.168.30.254:5060;user=phone SIP/2.0..Via: SIP/2.0/UDP 19
  2.168.30.190:5060;branch=z9hG4bK2f0441323F603793..From: "Reception 6002" <s
  ip:6002@192.168.30.254>;tag=822DE218-D1123CC9..To: <sip:6010@192.168.30.254
  ;user=phone>..CSeq: 2 INVITE..Call-ID: 7e9bfbd5-1531eede-63f1e6df@192.168.3
  0.190..Contact: <sip:6002@192.168.30.190:5060>..Allow: INVITE, ACK, BYE, CA
  NCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User
  -Agent: PolycomSoundPointIP-SPIP_650-UA/3.1.1.0137..Accept-Language: en..Su
  pported: 100rel,replaces..Allow-Events: talk,hold,conference..Proxy-Authori
  zation: Digest username="6002", realm="fireworx", nonce="0e0e3185", uri="si
  p:6010@192.168.30.254:5060;user=phone", response="293c91736a5cca5417762a41c
  6a87d5c", algorithm=MD5..Max-Forwards: 70..Content-Type: application/sdp..C
  ontent-Length: 215....v=0..o=- 1233159215 1233159215 IN IP4 192.168.30.190.
  .s=Polycom IP Phone..c=IN IP4 192.168.30.190..t=0 0..m=audio 2236 RTP/AVP 0
   8 101..a=rtpmap:0 PCMU/8000..a=rtpmap:8 PCMA/8000..a=rtpmap:101 telephone-
  event/8000..
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  SIP/2.0 100 Trying..Via: SIP/2.0/UDP 192.168.30.190:5060;branch=z9hG4bK2f04
  41323F603793;received=192.168.30.190..From: "Reception 6002" <sip:6002@192.
  168.30.254>;tag=822DE218-D1123CC9..To: <sip:6010@192.168.30.254;user=phone>
  ..Call-ID: 7e9bfbd5-1531eede-63f1e6df@192.168.30.190..CSeq: 2 INVITE..User-
  Agent: Asterisk PBX (Fireworx)..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, R
  EFER, SUBSCRIBE, NOTIFY..Supported: replaces..Contact: <sip:6010@192.168.30
  .254>..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  NOTIFY sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK7ae6ffc9;rport..From: <sip:6010@192.168.30.254>;tag=as
  1c3865c1..To: "David Brillert" <sip:6010@192.168.30.254>;tag=E13F0DEB-48653
  730..Contact: <sip:6010@192.168.30.254>..Call-ID: 384354f4-7ee6667d-12825a4
  a@192.168.30.194..CSeq: 103 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 353....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6010@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6010">.<address uri="sip:6010@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="inuse" />.<msnsubstatus substatus="onthephone" />.</addre
  ss>.</atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  NOTIFY sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK6f4e5bb9;rport..From: <sip:6010@192.168.30.254>;tag=as
  186fb9e1..To: "Reception 6002" <sip:6002@192.168.30.254>;tag=B0B4A510-35EE8
  E01..Contact: <sip:6010@192.168.30.254>..Call-ID: 6df8280d-fafe6f56-822de99
  7@192.168.30.190..CSeq: 165 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 353....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6002@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6010">.<address uri="sip:6010@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="inuse" />.<msnsubstatus substatus="onthephone" />.</addre
  ss>.</atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  INVITE sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK14b1d008;rport..From: "Reception 6002" <sip:6002@192.1
  68.30.254>;tag=as0b3f8efd..To: <sip:6010@192.168.30.194:5060>..Contact: <si
  p:6002@192.168.30.254>..Call-ID: 26f59341549109a34c9bc5363f0aed00@192.168.3
  0.254..CSeq: 102 INVITE..User-Agent: Asterisk PBX (Fireworx)..Max-Forwards:
   70..Remote-Party-ID: "Reception 6002" <sip:6002@192.168.30.254>;privacy=of
  f;screen=no..Date: Wed, 28 Jan 2009 16:13:42 GMT..Allow: INVITE, ACK, CANCE
  L, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Typ
  e: application/sdp..Content-Length: 240....v=0..o=root 319 319 IN IP4 192.1
  68.30.254..s=session..c=IN IP4 192.168.30.254..t=0 0..m=audio 10480 RTP/AVP
   0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:101 telephone-event/8000..a=fmtp:101
   0-16..a=silenceSupp:off - - - -..a=ptime:20..a=sendrecv..
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK7ae6ffc9
  ;rport..From: <sip:6010@192.168.30.254>;tag=as1c3865c1..To: "David Brillert
  " <sip:6010@192.168.30.254>;tag=E13F0DEB-48653730..CSeq: 103 NOTIFY..Call-I
  D: 384354f4-7ee6667d-12825a4a@192.168.30.194..Contact: <sip:6010@192.168.30
  .194:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK6f4e5bb9
  ;rport..From: <sip:6010@192.168.30.254>;tag=as186fb9e1..To: "Reception 6002
  " <sip:6002@192.168.30.254>;tag=B0B4A510-35EE8E01..CSeq: 165 NOTIFY..Call-I
  D: 6df8280d-fafe6f56-822de997@192.168.30.190..Contact: <sip:6002@192.168.30
  .190:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_650-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 100 Trying..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK14b1
  d008;rport..From: "Reception 6002" <sip:6002@192.168.30.254>;tag=as0b3f8efd
  ..To: <sip:6010@192.168.30.194:5060>;tag=8685CB85-EF658C72..CSeq: 102 INVIT
  E..Call-ID: 26f59341549109a34c9bc5363f0aed00@192.168.30.254..Contact: <sip:
  6010@192.168.30.194:5060>..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.1.
  1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 180 Ringing..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK14b
  1d008;rport..From: "Reception 6002" <sip:6002@192.168.30.254>;tag=as0b3f8ef
  d..To: <sip:6010@192.168.30.194:5060>;tag=8685CB85-EF658C72..CSeq: 102 INVI
  TE..Call-ID: 26f59341549109a34c9bc5363f0aed00@192.168.30.254..Contact: <sip
  :6010@192.168.30.194:5060>..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.1
  .1.0137..Allow-Events: talk,hold,conference..Accept-Language: en..Content-L
  ength: 0....
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  SIP/2.0 180 Ringing..Via: SIP/2.0/UDP 192.168.30.190:5060;branch=z9hG4bK2f0
  441323F603793;received=192.168.30.190..From: "Reception 6002" <sip:6002@192
  .168.30.254>;tag=822DE218-D1123CC9..To: <sip:6010@192.168.30.254;user=phone
  >;tag=as77d618b4..Call-ID: 7e9bfbd5-1531eede-63f1e6df@192.168.30.190..CSeq:
   2 INVITE..User-Agent: Asterisk PBX (Fireworx)..Allow: INVITE, ACK, CANCEL,
   OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Contact: <sip
  :6010@192.168.30.254>..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  CANCEL sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK14b1d008;rport..From: "Reception 6002" <sip:6002@192.1
  68.30.254>;tag=as0b3f8efd..To: <sip:6010@192.168.30.194:5060>..Call-ID: 26f
  59341549109a34c9bc5363f0aed00@192.168.30.254..CSeq: 102 CANCEL..User-Agent:
   Asterisk PBX (Fireworx)..Max-Forwards: 70..Remote-Party-ID: "Reception 600
  2" <sip:6002@192.168.30.254>;privacy=off;screen=no..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  NOTIFY sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK38cf6430;rport..From: <sip:6010@192.168.30.254>;tag=as
  1c3865c1..To: "David Brillert" <sip:6010@192.168.30.254>;tag=E13F0DEB-48653
  730..Contact: <sip:6010@192.168.30.254>..Call-ID: 384354f4-7ee6667d-12825a4
  a@192.168.30.194..CSeq: 104 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 348....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6010@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6010">.<address uri="sip:6010@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="open" />.<msnsubstatus substatus="online" />.</address>.<
  /atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  NOTIFY sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK2aac028a;rport..From: <sip:6010@192.168.30.254>;tag=as
  186fb9e1..To: "Reception 6002" <sip:6002@192.168.30.254>;tag=B0B4A510-35EE8
  E01..Contact: <sip:6010@192.168.30.254>..Call-ID: 6df8280d-fafe6f56-822de99
  7@192.168.30.190..CSeq: 166 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 348....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6002@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6010">.<address uri="sip:6010@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="open" />.<msnsubstatus substatus="online" />.</address>.<
  /atom>.</presence>.
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK14b1d008
  ;rport..From: "Reception 6002" <sip:6002@192.168.30.254>;tag=as0b3f8efd..To
  : <sip:6010@192.168.30.194:5060>..CSeq: 102 CANCEL..Call-ID: 26f59341549109
  a34c9bc5363f0aed00@192.168.30.254..Contact: <sip:6010@192.168.30.194:5060>.
  .User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.1.1.0137..Accept-Language: e
  n..Content-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK2aac028a
  ;rport..From: <sip:6010@192.168.30.254>;tag=as186fb9e1..To: "Reception 6002
  " <sip:6002@192.168.30.254>;tag=B0B4A510-35EE8E01..CSeq: 166 NOTIFY..Call-I
  D: 6df8280d-fafe6f56-822de997@192.168.30.190..Contact: <sip:6002@192.168.30
  .190:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_650-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 487 Request Cancelled..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=
  z9hG4bK14b1d008;rport..From: "Reception 6002" <sip:6002@192.168.30.254>;tag
  =as0b3f8efd..To: <sip:6010@192.168.30.194:5060>;tag=8685CB85-EF658C72..CSeq
  : 102 INVITE..Call-ID: 26f59341549109a34c9bc5363f0aed00@192.168.30.254..Con
  tact: <sip:6010@192.168.30.194:5060>..User-Agent: PolycomSoundPointIP-SPIP_
  550-UA/3.1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  ACK sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.254:5
  060;branch=z9hG4bK14b1d008;rport..From: "Reception 6002" <sip:6002@192.168.
  30.254>;tag=as0b3f8efd..To: <sip:6010@192.168.30.194:5060>;tag=8685CB85-EF6
  58C72..Contact: <sip:6002@192.168.30.254>..Call-ID: 26f59341549109a34c9bc53
  63f0aed00@192.168.30.254..CSeq: 102 ACK..User-Agent: Asterisk PBX (Fireworx
  )..Max-Forwards: 70..Remote-Party-ID: "Reception 6002" <sip:6002@192.168.30
  .254>;privacy=off;screen=no..Content-Length: 0....
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK38cf6430
  ;rport..From: <sip:6010@192.168.30.254>;tag=as1c3865c1..To: "David Brillert
  " <sip:6010@192.168.30.254>;tag=E13F0DEB-48653730..CSeq: 104 NOTIFY..Call-I
  D: 384354f4-7ee6667d-12825a4a@192.168.30.194..Contact: <sip:6010@192.168.30
  .194:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.1.2:5060
  OPTIONS sip:192.168.1.2;user=phone SIP/2.0..Via: SIP/2.0/UDP 192.168.30.254
  :5060;branch=z9hG4bK5ba1716c;rport..From: "asterisk" <sip:asterisk@192.168.
  30.254>;tag=as04a0a1cd..To: <sip:192.168.1.2;user=phone>..Contact: <sip:ast
  erisk@192.168.30.254>..Call-ID: 0752db4625559e3e4e97f03348615278@192.168.30
  .254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwards:
   70..Date: Wed, 28 Jan 2009 16:14:01 GMT..Allow: INVITE, ACK, CANCEL, OPTIO
  NS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length: 0..
  ..
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.190:5060;branch=z9hG4bK2f044132
  3F603793;received=192.168.30.190..From: "Reception 6002" <sip:6002@192.168.
  30.254>;tag=822DE218-D1123CC9..To: <sip:6010@192.168.30.254;user=phone>;tag
  =as77d618b4..Call-ID: 7e9bfbd5-1531eede-63f1e6df@192.168.30.190..CSeq: 2 IN
  VITE..User-Agent: Asterisk PBX (Fireworx)..Allow: INVITE, ACK, CANCEL, OPTI
  ONS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Contact: <sip:6010
  @192.168.30.254>..Content-Type: application/sdp..Content-Length: 240....v=0
  ..o=root 319 319 IN IP4 192.168.30.254..s=session..c=IN IP4 192.168.30.254.
  .t=0 0..m=audio 17976 RTP/AVP 0 101..a=rtpmap:0 PCMU/8000..a=rtpmap:101 tel
  ephone-event/8000..a=fmtp:101 0-16..a=silenceSupp:off - - - -..a=ptime:20..
  a=sendrecv..
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  ACK sip:6010@192.168.30.254 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.190:5060;b
  ranch=z9hG4bK11a4e399CBCBD582..From: "Reception 6002" <sip:6002@192.168.30.
  254>;tag=822DE218-D1123CC9..To: <sip:6010@192.168.30.254;user=phone>;tag=as
  77d618b4..CSeq: 2 ACK..Call-ID: 7e9bfbd5-1531eede-63f1e6df@192.168.30.190..
  Contact: <sip:6002@192.168.30.190:5060>..Allow: INVITE, ACK, BYE, CANCEL, O
  PTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent:
   PolycomSoundPointIP-SPIP_650-UA/3.1.1.0137..Accept-Language: en..Max-Forwa
  rds: 70..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.1.2:5060
  OPTIONS sip:192.168.1.2;user=phone SIP/2.0..Via: SIP/2.0/UDP 192.168.30.254
  :5060;branch=z9hG4bK5ba1716c;rport..From: "asterisk" <sip:asterisk@192.168.
  30.254>;tag=as04a0a1cd..To: <sip:192.168.1.2;user=phone>..Contact: <sip:ast
  erisk@192.168.30.254>..Call-ID: 0752db4625559e3e4e97f03348615278@192.168.30
  .254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwards:
   70..Date: Wed, 28 Jan 2009 16:14:01 GMT..Allow: INVITE, ACK, CANCEL, OPTIO
  NS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length: 0..
  ..
#
U 192.168.30.254:5060 -> 192.168.1.2:5060
  OPTIONS sip:192.168.1.2;user=phone SIP/2.0..Via: SIP/2.0/UDP 192.168.30.254
  :5060;branch=z9hG4bK5ba1716c;rport..From: "asterisk" <sip:asterisk@192.168.
  30.254>;tag=as04a0a1cd..To: <sip:192.168.1.2;user=phone>..Contact: <sip:ast
  erisk@192.168.30.254>..Call-ID: 0752db4625559e3e4e97f03348615278@192.168.30
  .254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwards:
   70..Date: Wed, 28 Jan 2009 16:14:01 GMT..Allow: INVITE, ACK, CANCEL, OPTIO
  NS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length: 0..
  ..
#
U 192.168.30.254:5060 -> 192.168.1.2:5060
  OPTIONS sip:192.168.1.2;user=phone SIP/2.0..Via: SIP/2.0/UDP 192.168.30.254
  :5060;branch=z9hG4bK5ba1716c;rport..From: "asterisk" <sip:asterisk@192.168.
  30.254>;tag=as04a0a1cd..To: <sip:192.168.1.2;user=phone>..Contact: <sip:ast
  erisk@192.168.30.254>..Call-ID: 0752db4625559e3e4e97f03348615278@192.168.30
  .254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwards:
   70..Date: Wed, 28 Jan 2009 16:14:01 GMT..Allow: INVITE, ACK, CANCEL, OPTIO
  NS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length: 0..
  ..
#
U 192.168.30.191:5060 -> 192.168.30.254:5060
  BYE sip:6002@192.168.30.254 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.191:5060;b
  ranch=z9hG4bK71e0796572088BC0..From: "6011" <sip:6011@192.168.30.254>;tag=E
  28D801D-CE25B318..To: <sip:6002@192.168.30.254;user=phone>;tag=as402219bd..
  CSeq: 3 BYE..Call-ID: 3da894a4-7e6157f3-7be40cf6@192.168.30.191..Contact: <
  sip:6011@192.168.30.191:5060>..User-Agent: PolycomSoundStationIP-SPIP_4000-
  UA/3.1.1.0137..Accept-Language: en..Proxy-Authorization: Digest username="6
  011", realm="fireworx", nonce="5105e481", uri="sip:6002@192.168.30.254:5060
  ;user=phone", response="e77a731372a7c0e0c80605fbf35deb1a", algorithm=MD5..M
  ax-Forwards: 70..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.191:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.191:5060;branch=z9hG4bK71e07965
  72088BC0;received=192.168.30.191..From: "6011" <sip:6011@192.168.30.254>;ta
  g=E28D801D-CE25B318..To: <sip:6002@192.168.30.254;user=phone>;tag=as402219b
  d..Call-ID: 3da894a4-7e6157f3-7be40cf6@192.168.30.191..CSeq: 3 BYE..User-Ag
  ent: Asterisk PBX (Fireworx)..Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REF
  ER, SUBSCRIBE, NOTIFY..Supported: replaces..Contact: <sip:6002@192.168.30.2
  54>..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  BYE sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.254:5
  060;branch=z9hG4bK5202b818;rport..From: "6011" <sip:6011@192.168.30.254>;ta
  g=as4c78709b..To: <sip:6002@192.168.30.190:5060>;tag=668CC2DC-D7B946D..Call
  -ID: 6767ca5d6b54a9305af572e07a276207@192.168.30.254..CSeq: 103 BYE..User-A
  gent: Asterisk PBX (Fireworx)..Max-Forwards: 70..Remote-Party-ID: "6011" <s
  ip:6011@192.168.30.254>;privacy=off;screen=no..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  NOTIFY sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK6ebfae99;rport..From: <sip:6002@192.168.30.254>;tag=as
  4ba16def..To: "David Brillert" <sip:6010@192.168.30.254>;tag=CBC527FD-CBF0D
  1CA..Contact: <sip:6002@192.168.30.254>..Call-ID: 7c02b12e-7ca388df-c9a4187
  4@192.168.30.194..CSeq: 106 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 353....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6010@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6002">.<address uri="sip:6002@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="inuse" />.<msnsubstatus substatus="onthephone" />.</addre
  ss>.</atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  NOTIFY sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK0c9f11a6;rport..From: <sip:6002@192.168.30.254>;tag=as
  64d9d186..To: "Reception 6002" <sip:6002@192.168.30.254>;tag=C4303C28-E9827
  A59..Contact: <sip:6002@192.168.30.254>..Call-ID: 3f88365-d8decdee-a7a8c16f
  @192.168.30.190..CSeq: 185 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Max
  -Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subscr
  iption-State: active..Content-Length: 353....<?xml version="1.0"?>.<!DOCTYP
  E presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<presen
  ce>.<presentity uri="sip:6002@192.168.30.254;method=SUBSCRIBE" />.<atom id=
  "6002">.<address uri="sip:6002@192.168.30.254;user=ip" priority="0.800000">
  .<status status="inuse" />.<msnsubstatus substatus="onthephone" />.</addres
  s>.</atom>.</presence>.
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK5202b818
  ;rport..From: "6011" <sip:6011@192.168.30.254>;tag=as4c78709b..To: <sip:600
  2@192.168.30.190:5060>;tag=668CC2DC-D7B946D..CSeq: 103 BYE..Call-ID: 6767ca
  5d6b54a9305af572e07a276207@192.168.30.254..Contact: <sip:6002@192.168.30.19
  0:5060>..User-Agent: PolycomSoundPointIP-SPIP_650-UA/3.1.1.0137..Accept-Lan
  guage: en..Content-Length: 0....
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK6ebfae99
  ;rport..From: <sip:6002@192.168.30.254>;tag=as4ba16def..To: "David Brillert
  " <sip:6010@192.168.30.254>;tag=CBC527FD-CBF0D1CA..CSeq: 106 NOTIFY..Call-I
  D: 7c02b12e-7ca388df-c9a41874@192.168.30.194..Contact: <sip:6010@192.168.30
  .194:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  NOTIFY sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK432b1755;rport..From: <sip:6011@192.168.30.254>;tag=as
  566d9104..To: "David Brillert" <sip:6010@192.168.30.254>;tag=ED4B3756-3015E
  4A7..Contact: <sip:6011@192.168.30.254>..Call-ID: 78b3bddb-c51d74e0-938a879
  9@192.168.30.194..CSeq: 104 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 348....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6010@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6011">.<address uri="sip:6011@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="open" />.<msnsubstatus substatus="online" />.</address>.<
  /atom>.</presence>.
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK0c9f11a6
  ;rport..From: <sip:6002@192.168.30.254>;tag=as64d9d186..To: "Reception 6002
  " <sip:6002@192.168.30.254>;tag=C4303C28-E9827A59..CSeq: 185 NOTIFY..Call-I
  D: 3f88365-d8decdee-a7a8c16f@192.168.30.190..Contact: <sip:6002@192.168.30.
  190:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_650-UA/3.1
  .1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK432b1755
  ;rport..From: <sip:6011@192.168.30.254>;tag=as566d9104..To: "David Brillert
  " <sip:6010@192.168.30.254>;tag=ED4B3756-3015E4A7..CSeq: 104 NOTIFY..Call-I
  D: 78b3bddb-c51d74e0-938a8799@192.168.30.194..Contact: <sip:6010@192.168.30
  .194:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.191:5060
  OPTIONS sip:6011@192.168.30.191:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.2
  54:5060;branch=z9hG4bK2e297f97;rport..From: "asterisk" <sip:asterisk@192.16
  8.30.254>;tag=as0e93cdd7..To: <sip:6011@192.168.30.191:5060>..Contact: <sip
  :asterisk@192.168.30.254>..Call-ID: 38898dae2844e3f8739d75164188d449@192.16
  8.30.254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwa
  rds: 70..Date: Wed, 28 Jan 2009 16:14:12 GMT..Allow: INVITE, ACK, CANCEL, O
  PTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length:
   0....
#
U 192.168.30.191:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK2e297f97
  ;rport..From: "asterisk" <sip:asterisk@192.168.30.254>;tag=as0e93cdd7..To:
  <sip:6011@192.168.30.191:5060>;tag=E610BE72-55732B69..CSeq: 102 OPTIONS..Ca
  ll-ID: 38898dae2844e3f8739d75164188d449@192.168.30.254..Contact: <sip:6011@
  192.168.30.191:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSA
  GE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: PolycomSoundStatio
  nIP-SPIP_4000-UA/3.1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  OPTIONS sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.2
  54:5060;branch=z9hG4bK0f37bb9a;rport..From: "asterisk" <sip:asterisk@192.16
  8.30.254>;tag=as5b003cd3..To: <sip:6010@192.168.30.194:5060>..Contact: <sip
  :asterisk@192.168.30.254>..Call-ID: 77251a9e36e9d7b81e4600b13da2687a@192.16
  8.30.254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwa
  rds: 70..Date: Wed, 28 Jan 2009 16:14:12 GMT..Allow: INVITE, ACK, CANCEL, O
  PTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length:
   0....
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK0f37bb9a
  ;rport..From: "asterisk" <sip:asterisk@192.168.30.254>;tag=as5b003cd3..To:
  <sip:6010@192.168.30.194:5060>;tag=61D01F18-AF3549B1..CSeq: 102 OPTIONS..Ca
  ll-ID: 77251a9e36e9d7b81e4600b13da2687a@192.168.30.254..Contact: <sip:6010@
  192.168.30.194:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSA
  GE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: PolycomSoundPointI
  P-SPIP_550-UA/3.1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.188:5060
  OPTIONS sip:6005@192.168.30.188:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.2
  54:5060;branch=z9hG4bK6e0e3ec3;rport..From: "asterisk" <sip:asterisk@192.16
  8.30.254>;tag=as2f6401e6..To: <sip:6005@192.168.30.188:5060>..Contact: <sip
  :asterisk@192.168.30.254>..Call-ID: 792df8950ff5e691028c1aad13cda6fb@192.16
  8.30.254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwa
  rds: 70..Date: Wed, 28 Jan 2009 16:14:12 GMT..Allow: INVITE, ACK, CANCEL, O
  PTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length:
   0....
#
U 192.168.30.188:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK6e0e3ec3
  ;rport..From: "asterisk" <sip:asterisk@192.168.30.254>;tag=as2f6401e6..To:
  <sip:6005@192.168.30.188:5060>;tag=424ACCEB-A2CB1D88..CSeq: 102 OPTIONS..Ca
  ll-ID: 792df8950ff5e691028c1aad13cda6fb@192.168.30.254..Contact: <sip:6005@
  192.168.30.188:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSA
  GE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: PolycomSoundPointI
  P-SPIP_330-UA/3.1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  OPTIONS sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.2
  54:5060;branch=z9hG4bK3e38f2a5;rport..From: "asterisk" <sip:asterisk@192.16
  8.30.254>;tag=as3c670110..To: <sip:6002@192.168.30.190:5060>..Contact: <sip
  :asterisk@192.168.30.254>..Call-ID: 4149369a21ce26e8042cc540053507f0@192.16
  8.30.254..CSeq: 102 OPTIONS..User-Agent: Asterisk PBX (Fireworx)..Max-Forwa
  rds: 70..Date: Wed, 28 Jan 2009 16:14:12 GMT..Allow: INVITE, ACK, CANCEL, O
  PTIONS, BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Content-Length:
   0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK3e38f2a5
  ;rport..From: "asterisk" <sip:asterisk@192.168.30.254>;tag=as3c670110..To:
  <sip:6002@192.168.30.190:5060>;tag=86B7217C-701E860D..CSeq: 102 OPTIONS..Ca
  ll-ID: 4149369a21ce26e8042cc540053507f0@192.168.30.254..Contact: <sip:6002@
  192.168.30.190:5060>..Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSA
  GE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER..User-Agent: PolycomSoundPointI
  P-SPIP_650-UA/3.1.1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  BYE sip:6010@192.168.30.254 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.190:5060;b
  ranch=z9hG4bK65235d56CBB0E797..From: "Reception 6002" <sip:6002@192.168.30.
  254>;tag=822DE218-D1123CC9..To: <sip:6010@192.168.30.254;user=phone>;tag=as
  77d618b4..CSeq: 3 BYE..Call-ID: 7e9bfbd5-1531eede-63f1e6df@192.168.30.190..
  Contact: <sip:6002@192.168.30.190:5060>..User-Agent: PolycomSoundPointIP-SP
  IP_650-UA/3.1.1.0137..Accept-Language: en..Proxy-Authorization: Digest user
  name="6002", realm="fireworx", nonce="0e0e3185", uri="sip:6010@192.168.30.2
  54:5060;user=phone", response="6474e8695a50e77da961963828adb1ed", algorithm
  =MD5..Max-Forwards: 70..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.190:5060;branch=z9hG4bK65235d56
  CBB0E797;received=192.168.30.190..From: "Reception 6002" <sip:6002@192.168.
  30.254>;tag=822DE218-D1123CC9..To: <sip:6010@192.168.30.254;user=phone>;tag
  =as77d618b4..Call-ID: 7e9bfbd5-1531eede-63f1e6df@192.168.30.190..CSeq: 3 BY
  E..User-Agent: Asterisk PBX (Fireworx)..Allow: INVITE, ACK, CANCEL, OPTIONS
  , BYE, REFER, SUBSCRIBE, NOTIFY..Supported: replaces..Contact: <sip:6010@19
  2.168.30.254>..Content-Length: 0....
#
U 192.168.30.254:5060 -> 192.168.30.194:5060
  NOTIFY sip:6010@192.168.30.194:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK42d0c734;rport..From: <sip:6002@192.168.30.254>;tag=as
  4ba16def..To: "David Brillert" <sip:6010@192.168.30.254>;tag=CBC527FD-CBF0D
  1CA..Contact: <sip:6002@192.168.30.254>..Call-ID: 7c02b12e-7ca388df-c9a4187
  4@192.168.30.194..CSeq: 107 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Ma
  x-Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subsc
  ription-State: active..Content-Length: 348....<?xml version="1.0"?>.<!DOCTY
  PE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<prese
  nce>.<presentity uri="sip:6010@192.168.30.254;method=SUBSCRIBE" />.<atom id
  ="6002">.<address uri="sip:6002@192.168.30.254;user=ip" priority="0.800000"
  >.<status status="open" />.<msnsubstatus substatus="online" />.</address>.<
  /atom>.</presence>.
#
U 192.168.30.254:5060 -> 192.168.30.190:5060
  NOTIFY sip:6002@192.168.30.190:5060 SIP/2.0..Via: SIP/2.0/UDP 192.168.30.25
  4:5060;branch=z9hG4bK370067a0;rport..From: <sip:6002@192.168.30.254>;tag=as
  64d9d186..To: "Reception 6002" <sip:6002@192.168.30.254>;tag=C4303C28-E9827
  A59..Contact: <sip:6002@192.168.30.254>..Call-ID: 3f88365-d8decdee-a7a8c16f
  @192.168.30.190..CSeq: 186 NOTIFY..User-Agent: Asterisk PBX (Fireworx)..Max
  -Forwards: 70..Event: presence..Content-Type: application/xpidf+xml..Subscr
  iption-State: active..Content-Length: 348....<?xml version="1.0"?>.<!DOCTYP
  E presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd">.<presen
  ce>.<presentity uri="sip:6002@192.168.30.254;method=SUBSCRIBE" />.<atom id=
  "6002">.<address uri="sip:6002@192.168.30.254;user=ip" priority="0.800000">
  .<status status="open" />.<msnsubstatus substatus="online" />.</address>.</
  atom>.</presence>.
#
U 192.168.30.190:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK370067a0
  ;rport..From: <sip:6002@192.168.30.254>;tag=as64d9d186..To: "Reception 6002
  " <sip:6002@192.168.30.254>;tag=C4303C28-E9827A59..CSeq: 186 NOTIFY..Call-I
  D: 3f88365-d8decdee-a7a8c16f@192.168.30.190..Contact: <sip:6002@192.168.30.
  190:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_650-UA/3.1
  .1.0137..Accept-Language: en..Content-Length: 0....
#
U 192.168.30.194:5060 -> 192.168.30.254:5060
  SIP/2.0 200 OK..Via: SIP/2.0/UDP 192.168.30.254:5060;branch=z9hG4bK42d0c734
  ;rport..From: <sip:6002@192.168.30.254>;tag=as4ba16def..To: "David Brillert
  " <sip:6010@192.168.30.254>;tag=CBC527FD-CBF0D1CA..CSeq: 107 NOTIFY..Call-I
  D: 7c02b12e-7ca388df-c9a41874@192.168.30.194..Contact: <sip:6010@192.168.30
  .194:5060>..Event: presence..User-Agent: PolycomSoundPointIP-SPIP_550-UA/3.
  1.1.0137..Accept-Language: en..Content-Length: 0....