ers, 105 multicasting films, Internet, 87 locations, users, registering with SIP, 97 multimedia services, 61 low-capacity gateways, PSTN-to-SIP multiple message bodies, SIP extensions, 170 internetworking, 207-208 naming conventions, IETF drafts, 52 Mbone, 70 NCP (Network Control Protocol), 45 MCUs (Multipoint Control Units), 216 negotiation process, SIP extensions, 160-162 networks media tools, SIP UAs, 100 circuit-switched, 2 MESSAGE method, instant messaging, control plane, 8 200-201 exchanges, 5 messages, SIP fully meshed, 3 body, 142-144, 211 origins, 3 instant, 171 signalling, 8 integrity, authentication, 189 star topology, 4 text-based, 130 strengths, 6 methods switches, 4 MESSAGE, 201 terminals, 6 semantics, SIP extensions, 164 user plane, 8 mid-session transactions, SIP weaknesses, 7 extensions, 169 domains, 3G mobile systems, 193 MMCC (Multimedia Conference Control), X.25, 36 CCP, 91 NNI (Network-to-Network Interface), 18 MMUSIC (Multiparty Multimedia Session non-standards track, IETF, 51 Control) working group, 48 non-successful final responses, SIP, 146 Index protocols BGMP, 70 OPTIONS requests, 126 CBTs, 68 overview of SIP, 90 CCP, 91 packet switching, 30 CMSS, 203 domains, 3G mobile systems, 193 DVMRP, 66 routers, 31 end to end, 41 strengths, 35 IETF design guidelines, 42-44 weaknesses, 36 IGMP, 68 PacketCable, 202-203 IMAP, 56, 59 packets INAP, 24 delay, 32 multicast routing, 65 headers, 31-32 NCP, 45 RTP, 71 PIM-DM, 66 path establishment delay, 7 PIM-SM, 68 PATH messages, RSVP, 79 PINT, 213 payload types, RTP packets, 71 RSVP, 78 PCM (Pulse Code Modulation), 14 RTCP, 73 peer-to-peer relationship, SIP RTP, 71, 91 extensions, 163 RTSP, 87 PHBs (Per Hop Behaviors), 79 SAP, 81-82 PIM-DM (Protocol Independent SCIP, 92 Multicast-Dense Mode), 66 SDP, 91 PIM-SM (Protocol Independent SDPng, 87 Multicast-Sparse Mode), 68 signalling, 2 PINT (PSTN and Internet SIP, 30 Interworking), 213 historical overview, 90 PRACK requests, SIP extensions, 168 transport layer, 144 presence service, 199-200 version 1, 91 PRI