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1 IP SIP RTPIP-PBX NGN 1 VoIP SIP 2002/122 1
2 VoIP SIP SIP NAT SIP PSTN IPPBX PCC IM 3GPP/IMS/SIP/NGN/RFC3261 GPP NGN IMS 2002/ /12 4 2
3 Public Switched Telephone Network Pots (Plain Old Telephone Service) Integrated Services Digital Network modem PSTN/ISDN SPT ADSL modem SPT DSLAM RAS for Dialup Remote Access Server Digital Subscriber Line Access Multiplexer SPT ( Splitter ) CPE ( Customer Premises Equipment ) Voice over IP Gateway CPE the Internet headset VoIP GW VoIP GW 2002/ Local Loop Trunk Line Trunk Line Local Loop headset VoIP GW /12 6 3
4 VoIP VoIP GW headset G/NGN/IMS 2002/ SIP 2002/12 8 4
5 RFC 2543 ( ) Windows XP ( ) Windows Messenger SIP Windows 2000 Windows 98/Me MSN Messenger ver4.xsip YAMAHA RT60wSIP( ) BB phone(0ab-j) RFC 3261 ( ) ( ) 2002/12 9 RFC(1/2) RFC RFC(SIP RFC RFCSIPDNS RFCSDP RFC 2002/
6 RFC(2/2) IETF GPP RFC GPP TS GPP2 RFC IETF 3GPP 2002/12 11 IP STP OK? OK? OK? D70 MHN IP Phone IP Phone No.7 H 323 : SIP : eaccess MEGACO/MGCP : BB Phone 2002/
7 SIP IP INVITE SIP (MSN Messenger) SIP (YAMAHA) SIP sip : hata@nttpc.co.jp 2002/12 13 Caller Callee INVITE 100 Trying 180 Ringing RTP BYE 2002/
8 UA INVITE To : eri@nttpc.co.jp From : natsumi@nttpc.co.jp nttpc.co.jp eri :5060 REGISTER From : eri@nttpc.co.jp Contact : :5060 UA User Agent) INVITE To : eri@nttpc.co.jp From : natsumi@nttpc.co.jp UA SIP : eri@nttpc.co.jp IP : : /12 15 INVITE Caller Callee INVITE 100 Trying 180 Ringing INVITE sip:bob@biloxi.example.com SIP/2.0 Via: SIP/2.0/TCP client.atlanta.example.com Max-Forwards: 70 Route: <sip:ss1.atlanta.example.com;lr> From: Alice <sip:alice@atlanta.example.com> To: Bob <sip:bob@biloxi.example.com> Call-ID: @atlanta.example.com CSeq: 1 INVITE Contact: <sip:alice@client.atlanta.example.com> Content-Type: application/sdp Content-Length: 151 v=0 o=alice IN IP4 cnt.ata.example.com s=c=in IP t=0 0 m=audio RTP/AVP 0 a=rtpmap:0 PCMU/ /
9 200OK Caller INVITE 100 Trying 180 Ringing Callee SIP/2.0 Via: SIP/2.0/TCP ss2.biloxi.example.com Via: SIP/2.0/TCP ss1.atlanta.example.com Via: SIP/2.0/TCP client.atlanta.example.com Record-Route: <sip:ss2.biloxi.example.com;lr>, <sip:ss1.atlanta.example.com;lr> From: Alice To: Bob Call-ID: CSeq: 2 INVITE Contact: <sip:bob@client.biloxi.example.com;> Content-Type: application/sdp Content-Length: 147 v=0 o=bob IN IP4 client.bexample.com s=c=in IP t=0 0 m=audio 3456 RTP/AVP 0 a=rtpmap:0 PCMU/ /12 17 INVITE sip:test@ SIP/2.0 Call-ID: a0de0a2496@ Contact: <sip:test@ :5060> Content-Length: 163 Content-Type: application/sdp CSeq: 24 INVITE From: <sip:test@ > To: <sip:test@ > Via: SIP/2.0/UDP :5060 v=0 o= IN IP s=c=in IP t=0 0 m=audio 5004 RTP/AVP 0 a=rtpmap:0 PCMU/8000 a=rtpmap:0 G.711U/ /
10 To : SIP-URL From : SIP-URL Call-ID : CSeq : Call-ID Via Contact CANCEL INVITE : : Content-Type: MIME ( ) INVITE application/sdp NOTIFY application/xpidftxml application/cpim-pidftxml MESSAGE text/plain 2002/12 19 SIP-URI From: <sip:hata@nttpc.co.jp;transport=udp>;tag=24521 SIP-URI URI transport = user = method = ttl= maddr= lr 2002/
11 Caller INVITE Callee 180 RINGING 1xx 2 6xx (reinvite ) RTP BYE (Call Leg) 2002/12 21 REGISTER A S REGISTER(F1) 401 Unauthorized REGISTER(F3) 2002/
12 REGISTER(F1) REGISTER sips:ss2.biloxi.example.com SIP/2.0 Via: SIP/2.0/TLS client.biloxi.example.com:5061;branch=z9hg4bknashds7 Max-Forwards: 70 From: Bob To: Bob Call-ID: CSeq: 1 REGISTER Contact: <sips:bob@client.biloxi.example.com> Content-Length: /12 23 REGISTER(F2) 2002/
13 REGISTER(F3) REGISTER sips:ss2.biloxi.example.com SIP/2.0 Via: SIP/2.0/TLS client.biloxi.example.com:5061;branch=z9hg4bknashd92 Max-Forwards: 70 From: Bob To: Bob Call-ID: CSeq: 2 REGISTER Contact: <sips:bob@client.biloxi.example.com> Authorization: Digest username="bob", realm="atlanta.example.com" nonce="ea9c8e88df84f1cec4341ae6cbe5a359", opaque="", uri="sips:ss2.biloxi.example.com", response="dfe56131d d ecc Content-Length: /12 25 REGISTER(F4) SIP/2.0 Via: SIP/2.0/TLS client.biloxi.example.com:5061;branch=z9hg4bknashd92 ;received= From: Bob <sips:bob@biloxi.example.com>;tag=ja743ks76zlflh To: Bob <sips:bob@biloxi.example.com>;tag=37gkehwl6 Call-ID: 1j9FpLxk3uxtm8tn@biloxi.example.com CSeq: 2 REGISTER Contact: <sips:bob@client.biloxi.example.com>;expires=3600 Content-Length: /
14 AAA (Authentication) ID+PASSWD) OK NG (Authorization) ID (Accounting) ID 2002/12 27 PAP (Password Authentication Protocol) CHAP (Challenge Handshake Authentication Protocol) OK/NG OK/NG 2002/
15 INVITE 407 Proxy Authentication Required INVITE 180 RINGING SIP/ Proxy Authentication Required Call-ID: CSeq: 82 INVITE From: To: User-Agent: YAMAHA RTA54i Via: SIP/2.0/UDP :5060 Date: Thu, 27 Feb :17:33 GMT Proxy-Authenticate: Digest realm="nttpc.com", domain= ", nonce=" ", opaque="", stale=false, algorithm=md5 INVITE SIP/2.0 Call-ID: Contact: Content-Length: 135 Content-Type: application/sdp CSeq: 83 INVITE From: Proxy-Authorization: Digest username="nttpc5369", realm="nttpc.com", nonce=" ", opaque="", uri=" ", response="d2b7b1cbfa020aab7ce6c728b00238d1" To: User-Agent: YAMAHA RTA54i Via: SIP/2.0/UDP : /12 29 char *username= bob"; char *nonce=" "; char *realm=" atlanta.example.com"; char *passwd="mypasswd"; char *uri=" sips:ss2.biloxi.example.com "; char *cnonce="0d03c005"; char nc[9]=" "; char *qop="auth"; char *method="invite"; char HA1[36]; char HA2[36]; char response[36]; 2002/
16 /12 Digest HA1=MD5(Username:Realm:Password HA2=MD5(Method:URI) Response=MD5(HA:Nonce:HA2) HASH MD5 SHA-1 MD /12 INVITE(F1) 407(F2) (F3) INVITE(F4) INVITE(F5) 100(F6) 180(F7) 180(F8) RTP BYE BYE Alice Bob
17 INVITE(INV) F1 INVITE SIP/2.0 Via: SIP/2.0/TCP client.atlanta.example.com:5060;branch=z9hg4bk74b43 Max-Forwards: 70 Route: <sip:ss1.atlanta.example.com;lr> From: Alice To: Bob Call-ID: CSeq: 1 INVITE Contact: <sip:alice@client.atlanta.example.com;transport=tcp> Content-Type: application/sdp Content-Length: 151 v=0 o=alice IN IP4 client.atlanta.example.com s=c=in IP t=0 0 SDP m=audio RTP/AVP 0 a=rtpmap:0 PCMU/ /12 33 INVITE(407) F2 SIP/ Proxy Authorization Required Via: SIP/2.0/TCP client.atlanta.example.com:5060;branch=z9hg4bk74b43 From: Alice <sip:alice@atlanta.example.com>;tag=9fxced76sl To: Bob <sip:bob@biloxi.example.com>;tag=3flal12sf Call-ID: @atlanta.example.com CSeq: 1 INVITE Proxy-Authenticate: Digest realm="atlanta.example.com", qop="auth", nonce="f84f1cec41e6cbe5aea9c8e88d359", opaque="", stale=false, algorithm=md5 Content-Length: 0 From-tag Challenge 2002/
18 INVITE()F3 SIP/2.0 Via: SIP/2.0/TCP client.atlanta.example.com:5060;branch=z9hg4bk74b43 Max-Forwards: 70 From: Alice To: Bob Call-ID: CSeq: 1 Content-Length: /12 35 INVITE(INV)F4 INVITE sip:bob@biloxi.example.com SIP/2.0 Via: SIP/2.0/TCP client.atlanta.example.com:5060;branch=z9hg4bk74bf9 Max-Forwards: 70 Route: <sip:ss1.atlanta.example.com;lr> From: Alice <sip:alice@atlanta.example.com>;tag=9fxced76sl To: Bob <sip:bob@biloxi.example.com> Call-ID: @atlanta.example.com CSeq: 2 INVITE Contact: <sip:alice@client.atlanta.example.com;transport=tcp> Proxy-Authorization: Digest username= alice, realm= atlanta.example.com, nonce="wf84f1ceczx41ae6cbe5aea9c8e88d359", opaque="", uri="sip:bob@biloxi.example.com",response="42ce3cef44b22f50c6a6071bc8" Content-Type: application/sdp Content-Length: 151 v=0 o=alice IN IP4 client.atlanta.example.com s=c=in IP t=0 0 m=audio RTP/AVP 0 a=rtpmap:0 PCMU/8000 CSeq response 2002/
19 INVITE(180) F7 SIP/ Ringing Via: SIP/2.0/TCP ss1.atlanta.example.com:5060;branch=z9hg4bk2d4790 Via: SIP/2.0/TCP client.atlanta.example.com:5060;branch=z9hg4bk74bf9 Record-Route: <sip:ss2.biloxi.example.com>,<sip:ss1.atlanta.example.com> From: Alice To: Bob Call-ID: Contact: Via CSeq: 2 INVITE From Content-Length: 0 To 2002/12 37 INVITE(180)F8 SIP/ Ringing Via: SIP/2.0/TCP client.atlanta.example.com:5060;branch=z9hg4bk74bf9 Record-Route: <sip:ss2.biloxi.example.com>, <sip:ss1.atlanta.example.com> From: Alice <sip:alice@atlanta.example.com>;tag=9fxced76sl To: Bob <sip:bob@biloxi.example.com>;tag= Call-ID: @atlanta.example.com Contact: <sip:bob@client.biloxi.example.com;transport=tcp> CSeq: 2 INVITE Content-Length: 0 Via 2002/
20 INVITE(200)F9 SDP Contact 2002/12 39 INVITE() SIP/2.0 Via: SIP/2.0/TCP client.atlanta.example.com:5060;branch=z9hg4bk74b76 Max-Forwards: 70 Route: <sip:ss1.atlanta.example.com>, <sip:ss2.biloxi.example.com> From: Alice To: Bob Call-ID: CSeq: 2 Content-Length: /
21 INVITE(BYE) BYE SIP/2.0 Via: SIP/2.0/TCP client.biloxi.example.com:5060;branch=z9hg4bknashds7 Max-Forwards: 70 Route: <sip:ss2.biloxi.example.com;lr>,<sip:ss1.atlanta.example.com;lr> From: Bob To: Alice Call-ID: CSeq: 1 BYE Content-Length: /12 41 INVITE(200) SIP/2.0 Via: SIP/2.0/TCP client.biloxi.example.com:5060;branch=z9hg4bknashds7 From: Bob <sip:bob@biloxi.example.com>;tag= To: Alice <sip:alice@atlanta.example.com>;tag=9fxced76sl Call-ID: @atlanta.example.com CSeq: 1 BYE Content-Length: /
22 Cancel A S C INVITE 100 Trying 180Trying INVITE 100 Trying 180Trying CENCEL(F3) 487 Request Terminated CENCEL(F3) 487 Request Terminated CANCEL 2002/12 43 CANCEL(F1) CANCEL sip:bob@biloxi.example.com SIP/2.0 Via: SIP/2.0/UDP client.atlanta.example.com:5060;branch=z9hg4bk74bf9 Max-Forwards: 70 From: Alice <sip:alice@atlanta.example.com>;tag=9fxced76sl To: Bob <sip:bob@biloxi.example.com> Route: <sip:ss1.atlanta.example.com;lr> Call-ID: 2xTb9vxSit55XU7p8@atlanta.example.com CSeq: 1 CANCEL Content-Length: /
23 CANCEL(F2) SIP/2.0 Via: SIP/2.0/UDP client.atlanta.example.com:5060;branch=z9hg4bk74bf9 From: Alice To: Bob Call-ID: CSeq: 1 CANCEL Content-Length: /12 45 CANCEL(F3) SIP/ Request Terminated Via: SIP/2.0/UDP client.atlanta.example.com:5060;branch=z9hg4bk74bf9 From: Alice <sip:alice@atlanta.example.com>;tag=9fxced76sl To: Bob <sip:bob@biloxi.example.com>;tag= Call-ID: 2xTb9vxSit55XU7p8@atlanta.example.com CSeq: 1 INVITE 2002/
24 CANCEL(F4) SIP/2.0 Via: SIP/2.0/UDP client.atlanta.example.com:5060;branch=z9hg4bk74bf9 Max-Forwards: 70 From: Alice To: Bob Call-ID: Proxy-Authorization: Digest username="alice", realm="atlanta.example.com", nonce="ze7k1ee88df84f1cec431ae6cbe5a359", opaque="", response="b00b d7e243f55708d44be7b" CSeq: 1 Content-Length: /12 47 Cancel A S C INVITE 100 Trying 180Trying INVITE 100 Trying 180Trying CENCEL(F3) INVITE 100 Trying 180Trying 487 Request Terminated 2002/
25 UDP UDP SNMP RADIUS 2002/ INVITE Via : : Caller INVITE Via : : Callee CalleeCaller 2002/
26 INVITE Via : : Caller INVITE Via : : Via : : 5150 Callee Callee 200OK Caller INVITE (BYE) Route Caller/CalleeIP SDP 2002/12 51 UA PROXY UA INVITE INVITE INVITE UA PROXY UA INVITE INVITE Via Record-Route 2002/
27 UDP1 IP1/Port1 IP2/Port2 SIP:IP1 Sport:Port1 DIP:IP2 Dport:Port2 SIP:IP2 Sport:Port2 DIP:IP1 Dport:Port1 DIPIP Dport: SIPIP Sport: Radius SNMPUDP IP 2002/12 53 UDP2 IP1/Port1 IP2/Port2 IP /Port SIP:IP1 Sport:Port1 DIP:IP2 Dport:Port2 SIP:IP2 Sport:Port2 DIP:IP3 Dport:Port3 SIP:IP3 Sport:Port3 DIP:IP2 Dport:Port2 IP2 2002/
28 (Via,Route,R-R) Via Record-Route Route Contact Request-URI 2002/12 55 STRICT ROUTING STRICT ROUTING Caller 1 1 (Caller) (Caller) A INV V:A C:A CANS BYE B V:A R:C R:D C:A V:A RR:C RR:B C:D B INV V:B V:A RR:B BYE C V:B V:A R:D RR:B C:A V:B V:A RR:C RR:B C:D C INV V:C V:B V:A RR:C RR:B C:A BYE D V:C V:B RR:C RR:B C:A V:C V:B V:A RR:C RR:B C:D D 200OK OK 200OK OK 200OK OK BYE/ Route 200OK OK RR : NODE1 RR : NODE2 RR : NODE3 RR : NODE4 C : NODE5 /BYE REQURST-URL : NODE4 R : NODE3 R : NODE2 R : NODE1 R : NODE5 Record-Route RouteURL Record-Route RouteContactURL Record-Route Route Record Contact Record 2002/
29 Callee STRICT ROUTING 2 2 (Callee (Callee) ) A INV V:A C:A BYE A V:B V:C V:D RR:B RR:C C:D B INV V:B V:A RR:B C:A BYE B V:C V:D R:A RR:C C:D C INV V:C V:B V:A RR:C RR:B C:A BYE C V:D R:B R:A C:D D INV INVITE INVITE BYE INVITE RR : NODE1 RR : NODE2 RR : NODE3 RR : NODE4 C : NODE5 BYE REQURST-URL : NODE1 R : NODE2 R : NODE3 R : NODE4 R : NODE5 Record-Route RouteURL Record-Route RouteContactURL Record-Route Route 2 Record Contact Record 2002/12 57 LOOSE ROUTING LOOSE ROUTING Caller 1 1 (Caller) (Caller) A INV V:A C:A V:A RR:C;lr RR:B;lr C:D BYE D V:A R:B R:C C:A B INV V:B V:A RR:B;lr V:B V:A RR:C;lr RR:B;lr C:D BYE D V:B V:A R:C RR:B;lr C:A C INV V:C V:B V:A RR:C;lr RR:B;lr C:A V:C V:B V:A RR:C;lr RR:B;lr C:D BYE D V:C V:B RR:C;lr RR:B;lr C:A D 200OK OK 200OK OK BYE/ Route 200OK OK RR : NODE1 RR : NODE2 RR : NODE3 RR : NODE4 C : NODE0 /BYE REQURST-URL : NODE0 R : NODE4 R : NODE3 R : NODE2 R : NODE1 Contact URL Record-Route RouteRecord 2002/
30 Callee LOOSE ROUTING 2 2 (Callee (Callee) ) A INV V:A C:A BYE A V:B V:C V:D RR:B RR:C C:D B INV V:B V:A RR:B C:A BYE A V:C V:D R:B RR:C C:D C INV V:C V:B V:A RR:C;lr RR:B;lr C:A C:D BYE A V:D R:C R:B C:D D INV INVITE INVITE BYE INVITE RR : NODE1 RR : NODE2 RR : NODE3 RR : NODE4 C : NODE5 BYE REQURST-URL : NODE5 R : NODE1 R : NODE2 R : NODE3 R : NODE4 Contact URL Record-Route RouteRecord 2002/ /
31 SDP v=0 o=alice IN s=c=in IP t=0 0 m=audio RTP/AVP 0 a=rtpmap:0 PCMU/8000 IP G.711 A INVITE SDP m= 1111 SDP m= 2222 B / ms 20ms 20ms 20ms 20ms RTP SQC=N N+1 N+2 N sample x 8bit / 20ms 20ms = RTP UDP IP ms N+4 N /
32 Ver=2.0 Padding=0 Extension=0 Marker=0 =0 PCM law ID IP UDP V P X CC M Type Sqc Time Stamp SSRC 1 Type : 0 PCM -law 2 G721 8 PCM a-law 9 G JPEG Video 2002/12 63 RTP wav 2002/
33 () Mbps /12 65 MIC SP 2002/
34 () WAV 2 PCM 2 () 2002/ S/N 2002/
35 Law (a) ) 1bit ) 1bit -law () a-law ( ) PCM (b) 2002/ law bitpcm 8bi /
36 IP UDP RTCP RTCP RTCP 2002/ /
37 API SIP RTP API RTP 2002/12 73 Win32) waveinopen waveinprepareheader waveinaddbuffer waveinstart waveinunprepareheader waveoutopen waveoutprepareheader waveoutwrite waveoutunprepareheader 2002/
38 LAN NIC -law -law MIXER A/D SP MIC WAV PCM FFT/LPC f ex. VoIP 2002/12 75 Win32 API 2002/
39 SIP VoIP 2002/12 77 (NAT) (NAT) IM UM IM UM IP SIP SIP CORE CORE PSTN DNS ENUM 2002/
40 REGISTER INVITE To: INVITE To: /12 79 NAT SIP SIP NAT REGISTER Via : : Contact : : INVITE OK NAT INVITE REGISTER Via : Contact : 2002/
41 NAT Caller Y Callee X INVITE Media Port : 5004 Media Proto : RTP/AVP Media Port : 9662 Media Proto : RTP/AVP Connection Address : 5004RTP 5005RTCP 9662RTP 9663RTP NAT RTP INVITE SDP IP(?) 2002/12 81 NAT NAPT/FW SIP SIP(UA) RTP SIP RTP NAPT SIP(UA) NAPT/FW SIP RTP STUN UA (STUN SIPREGISTER FW SIP SIP NAPT/FW SIP(UA) SIP NAPT/FW FW 2002/
42 /12 NAPT/FW SIP(UA) SIPNAT NAPT/FW SIP(UA) UA SIP UPnP NAT Traversal GapNAT SIP(UA) NAPT/FW FW SIP SIP IP NAPT/FW WARP START NAT Traversal NAT /12 SIP-Proxy REG m:p REG m:p REG m:x INV To:A From:B m:b SDP=B1 INV To:A From:B m:b SDP=B1 INV To:A From:B m:x1 SDP=X1 INV To:A From:B m:x SDP=X1 A X A G 200 To:A From:B m:p SDP=P1 P G 200 To:A From:B m:p SDP=P1 RTP P1 X1 RTP G1 X1 P1 G1 RTP X1 B1 X2 G1 200 To:A From:B m:x SDP=X2 X1 B1 200 To:A From:B m:x SDP=X2 RTP X1 B1 RTP B1 X2 RTP B1 X2 RTP X1 G1 RTP X1 P1
43 Mobile IP 2002/12 85 CoA Forwarding Cache HomeLAN /24 HA R Route Advertise / :880 FA /30 FA HA :80 FA / /
44 FA The Internet FA MN 2002/12 87 CoA The Internet MN 2002/
45 Proxy MIP NTTPC IP Warp The Internet MFA MN 2002/12 89 NAT 2002/
46 2002/12 91 () () () 2002/
47 ATMQoS(6Mbps 50%) VoIP 1ch=100Kbps 3060? SIPRTP REGISTER OPTION SIP RTP QoSSIP>RTP> SIPRTP ALG ALG 2002/12 93 ALGRTP AB AALG (RTP BALG (RTP BALG 2002/
48 20ms RTP SQC=N 20ms 20ms N+1 20ms 20ms N+2 N+3 20ms N+4 N /12 95 Packetization time Sender Receiver Playout Delay buffer Late Loss Time Time Time 2002/
49 2002/ /
50 2002/ /
51 SIPRTP REGISTER OPTION SIP RTP QoSSIP>RTP> SIPRTP ALG ALG 2002/ PLC) 2002/
52 2002/ /
53 IP-PBX 2002/ IP SIP STP CA SG IGX R R MG PSTN PSTN VPN IP SIP NAPT/FW IP PC NAPT GW PBX PBX IAD ADSL 2002/
54 IPPBX IP CASIP Proxy SGSS7GW MG IP/PSTN GW (UA) SIP GW(TA) IAD TA + DSL(+PPPoE) CA UA IAD Call Agent User Agent Integrated Access Device 2002/ IGX 2002/
55 IP PBX / OFF 2002/ REFER REFER REFER INVITE) SUBSCRIBE REFER INVITE 2002/
56 (Unattended Transfer) Referrer ( RTP Referrer ( C Target REFER Refer-To:C 202 Accepted Notify BYE INVITE Referred-By:A 180 Ringing Notify RTP C 2002/ (Attended Transfer) A B C RTP INV a=sendonly 200 a=revonly REF Refer-To:C?Replaces=2 202 NOT 200 NOT 200 BYE 200 INV Call-ID:2 200 m:c RTP INV a=sendonly 200 m:c INV Replaces:2 200 BYE 200 B RTP 2002/
57 IPPBX B2BUA SIP Proxy IPPBX A SIP Proxy B A IPPBX B INV To:B CallID:1 To:B CallID:1 To:B CallID:1 INV To:B CallID:1 To:B CallID:1 To:B CallID:1 INV To:B CallID:1 To:B CallID:1 To:B CallID:1 INV To:B CallID:2 To:B CallID:2 To:B CallID:2 BYE To:B CallID:1 To:B CallID:1 BYE To:B CallID:1 To:B CallID:1 BYE To:B CallID:1 To:B CallID:1 BYE To:B CallID:2 To:B CallID:2 B2BUA 2002/ C B A IPPBX INV To:B 11 INV To: Ringing INV To:B 180 Ringing 180 Ringing B,C CAN To:B 487 Request Terminated A C 2002/
58 PCC B A IPPBX INV To:B /no SDP INV To:B /no SDP 180 Ringing 180 Ringing /SDP of B /w SDP of A INV To:A /SDP of B 180 Ringing /SDP of A A B 2002/ IPPBX C Call-ID:2 B INV IPCX INV A Call-ID:1 Call-ID:4 Call-ID:3 INV To:C INV To:C REFER IP-PBX 2002/
59 C B IPCX A Call-ID:4 Call-ID:2 INV SDP:? 200 INV SDP:A REFER Refer-To:C;replace=3 Refered-By:B 202 Accepted INV SDP:C 200 Call-ID: / C B IPCX A Call-ID:2 Call-ID:3 NOTIFY 200 BYE 200 BYE 200 Call-ID:4 BYE BYE Call-ID:1 2002/
60 Session Border Controller SBC (Session Border Controller ) Proxy Fire Wall IPCX A /24 IPCX B /24 IPCX IP IP BPX IP-BPX IPCX C /24 IPCX D /24 SIP IP IP ISBC 2002/ SIP Natsumi Eri Natsumi INFORM Natsumi MESSAGE Natsumi 2002/
61 Natsumi REGISTER From:Natsumi SIP REGISTER From:Eri SUBSCRIBE To:Natsumi NOTIFY From:Natsumi Eri Natsumi 2002/ (1) A SIP B C REGISTER SUBSCRIBE B B SUBSCRIBE C NOTIFY B REGISTER SUBSCRIBE A NOTIFY A SUBSCRIBE C REGISTER C NOTIFY C NOTIFY C SUBSCRIBE A NOTIFY A SUBSCRIBE B NOTIFY B 2002/
62 (2) A SIP B C REGISTER expires : 0 NOTIFY A NOTIFY A NOTIFY MSN Messenger? REGISTER SUBSCRIBE MSN Messenger NOTIFY(NOTIFY?) SIP Messenger 2002/ (3) draft-ietf-simple-presence-01.txt ( ) NOTIFY SUBSCRIBE NOTIFY MIME ACCEPT application/xpidftxml draft-ietf-simple-presence-07.txt ( ) NOTIFY MIMEapplication/cpim-pidftxml MSN Messenger SUBSCRIBE Accept draft-ietf-impp-cpim-pidf-05.txt cpim-pidftxml MSN Messenge cipm-pidftxml 2002/
63 NOTIFY SIP/2.0 Via: SIP/2.0/UDP :13170 From: To: Call-ID: CSeq: 1 NOTIFY Contact: <sip: :13170> User-Agent: Windows RTC/1.0 Content-Type: application/xpidf+xml Content-Length: 353 <?xml version="1.0"?> <!DOCTYPE presence PUBLIC "-//IETF//DTD RFCxxxx XPIDF 1.0//EN" "xpidf.dtd"> <presence> <presentity uri="sip:xiaotaow@cs.columbia.edu;method=subscribe" /> <atom id="1003"> <address uri="sip: :13170;user=ip" priority=" "> <status status="open" /> <msnsubstatus substatus="online" /> </address> </atom> </presence> MessengerNOTIFY ( NOTIFY) 2002/ <status status = closed > SIP SIP B NOTIFY A expires : 0 SUBSCRIBE A A NOTIFY expires /
64 B AS) IP B2BUA AS( UA SIP SIP UA 2002/ (Party Line) ABC A B+C C A A A B C 2002/
65 PSTN To : 050-AAA-BBBB To : Media Gateway INVITE DB X A SIP Proxy PSTN IP 050-XXXX-YYYY 050-AAAA-BBBB X A A 2002/ C ISP A IP IP AAAA PSTN (NTT ) 050-AAAA-9876 ISP C 050-AAAA-1234 IP IP BBBB From : 050-AAAA-9876 A B 050-CCCC BBBB /
66 ISPVoIP ISP REGISTER ISP IP PSTN ISP REGISTER INVITE ISP VoIP TTC / IP WXYZ / PSTN Soft Phone as of 2003/4 2002/
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