IP Telephony - Telephony ...

Download IP Telephony  -    Telephony    ...

Post on 29-Mar-2018

212 views

Category:

Documents

0 download

TRANSCRIPT

GLOCOM Review 3:7/8 Center for Global Communications, 1998IP Telephony 1.IP Telephony 2.IP Telephony 3.IP Telephony 4. IP Telephony 5.IP Telephony 6.IP Telephony 7.IP Telephony IP TelephonyIP IP IP VoIPVoice over IPIP TelephonyIP TelephonyIP Telephony IP TelephonyIPTelephonyIP TelephonyGLOCOM Review 3:7/82 1 1997 1IPInternet Protocol2 IP IP Telephony Fax IP Fax IPTelephony1.IP Telephony 1.1IP Telephony IP TelephonyIP Telephony 1995 2 VocalTec3Internet Phone IP Telephony 3 IP Telephony1996 7 Intel4Intel Internet Phone Microsoft5Netscape6 IP TelephonyNetscape NetscapeNavigator CoolTalk Microsoft NetMeeting IP Telephony 1996 8 IDT7Net2Phone 1 15,000 1996 VocalTec Dialogic8Internet Telephony GatewayServerPSTN IP Telephony 1 ActivMedia 1996 25 1997 218 1 8.7 2 Voice 1998 6 3 .4 .5 .6 .7 .8 .GLOCOM Review 3:7/83 IP QoSQualityof Service1.2IP Telephony IP Telephony IPTelephony Fax IP IP Frost & Sullivan9IP Telephony 5 Khanna and Repentigny1997aVoicemail filewav FaxVoice TelephonyDesktop VideoconferencingApplication Sharing and Document SharingDocument Sharing 1.3IP Telephony IP Telephony 3 1 1. PCPC 2. PC3. 1.PCPC PC PC PC 9 .GLOCOM Review 3:7/84VocalTec Internet PhoneIntel Internet Video PhoneMicrosoft NetMeetingNetscape Netscape CoolTalk/Conference2.PC1.IP PC IDTNet2PhonePC IDT IDT IDT 800 ISP IDT PC ID PINPersonal Identification Number CTIComputer Telephony Integration1998 3.IPPC ID PIN PC IP Telephony ITSPInternet Telephony ServiceProvider ITSP ISP FreePort i SP-10010IC FAX320011 Fax Casio PhoneMate IT-38012 10 .11 .12 . 1GLOCOM Review 3:7/851.4 Fax Fax IP TelephonyFax Fax ISP UUNET TechnologiesUUNET13 1997 7 Fax UUFAX14Fax1 65KB 30 1516PSTN Fax 1997 4,400 2000 56 Fax 2000 Fax 74 40 2 Fax ITSP Fax ITSP FaxFax Fax Fax DDI17 LCR -LCR-ALPHA5 Fax DDI Fax -ALPHA5Fax Fax FaxFax Fax FaxFax PCFax PC 18F@xEm@il19PCFax Fax Fax NTT20 F 21FaxPC Fax TIFF MIME SMTP PC Fax Fax Fax Fax 22IETFInternet Engineering TaskForce231998 6 ITU T.37 2.IP Telephony 2.1IP Telephony Pros 13 .14 .15 .16 .17 .18 .19 .20 .21 .22 .23 .GLOCOM Review 3:7/862.1.1IP TelephonyIP Telephony IP AP AP24 AP IP ISP IP flat-rateusage-based1 IP Telephony LAN IP ITSP 1 6877 20233 3NTT 90* KDD 450*DDI, JT, TWJ 90* ITJJT, IDC 440*TTNet 63 Kallback 146**** 61** 91**AT&T@phoneAT&T Jens 69*** AT&T@phoneAT&T Jens 99*** 1 1998 5 27 * ** 10 3 *** **** 1.08 1 135 25 2 17 29261997 1160 1KDD 410** 1 236 0.58**** 69 0.17*** 21997 1-1p.101* ** 1998 5 KDD 440 *** KDD 410 0.540.16IP Telephony Geoequipos 24 25 .26 1 1996 160 GLOCOM Review 3:7/87Geoequipos Telecom Peru IDDInternational Direct Dialing 1,800Telecom PeruVocalTecInternet Phone 150200 1/10 Cukier19982.1.2 IP Fax IP VoIP:Voice over IP IP TDMTime Division Multiplexer 10 TDM 1 IP IP IP TDM IP IP TDM 272.1.3IP Telephony IP LAN ConvergenceIP Telephony CTI CTI Call Center1998 30 2001 112 Gartner Group 2000 35Fax28Web-Enabled Call CenterWECCWECC eFusion29 eBridgeCall Center 1Push-To-Talk 27VoIP ATM VToAVoice trafficover ATM VoFRVoice over Frame Relay28 Essl Technologies. The Web-Enabled Call Center: Reaching Out to the Online Community..29 .GLOCOM Review 3:7/88 1/10 deJong1998 WECC Essl Technologies Managing Director Steven Dresner InternetTelephony TCP/IP Multimedia TelephonyDresner1997IP Telephony 2.2IP Telephony Cons2.2.1IP Telephony ID PIN ID PIN 3 2.2.2IP Telephony200250 IP 3 IP Telephony VoIP PC IP IP TCPTranmission Control Protocol30TCP TCP IP 2.2.3Interoperability IP TelephonyIP Telephony 30 IP-Telephony TCP UDPUser Datagram ProtocolUDP TCP QoS GLOCOM Review 3:7/89IP Telephony ITSP IP Telephony3.IP Telephony 3.1IP Telephony 3.1.1IP Telephony PC PCPC PCIP Telephony PC 1997 45 PC 311998 5 10 1997 28.8 1/41998 1998 1 PC 4832[51] 10 1997 6.41 1996 3.31 2 2005 41.82010 54.91998 3 IAJ331998 23 7.08 1,009 7,300 1 9.5 23.4 2.3 27.6 IP Telephony341997 2005 2010 1,155 4,136 4,459 287 6.41,929 41.82,755 54.9 31998 1-1-9 3.1.235 31 Computer Intelligence 1998/3.32 ZD Market Intelligence 1998/5. Computer Intelligence 1998 4 ZD Market Intelligence Ziff-Davis 33 .34 Internet Watch. .35GLOCOM Review 3:7/810 1996 10 31 36371997 7 8 38 1997 12 8 8 26 393.1.3 IP Telephony PC IP Telephony 1995 2 VocalTec InternetPhonePulver IP Telephony 4 VocalTec Internet Phone Microsoft NetMeeting 2 1997 1996 1 VocalTec Internet Phone (757) 1 VocalTec Internet Phone (1176)2 NetMeeting (414) 3 TeleVox (316)3 CU-SeeMe (305) 5 NetMeeting (314)4 TeleVox (276) 2 Intel Internet Video Phone (216)5 CoolTalk (249) 6 CU-SeeMe (202)6 Intel Internet Video Phone (231) 4 CoolTalk (173)7 Net2Phone (228) 10 WebPhone (169)8 FreeTel (160) 8 FreeTel (135)9 Freephone (155) NA VDOPhone (111)10 WebPhone (154) 7 Net2Phone (107) 4IP Telephony1996, 1997 40IP Telephony IP Telephony1998 3 41 1 Lucent TechnologiesLucent42Alcatel43Northern Telecom44Ericsson45Siemens Telecom Networks46NEC47 3637 8/26 :38 .39 .40 Voice on the Net CoalitionVON 1 5 2 3 3 1 41 Computer Intelligence 1998/3.42 .GLOCOM Review 3:7/81148 VoIP 2Cisco Systems493Com50AscendCommunications51Bay Networks52 VoIP 3 IP TelephonyAct Networks53Clarent54Inter-Tel55Hypercom56Mockingbird57NetSpeak58Vienna Systems59VocalTec VoIP NetSpeak MCI Communications60 IP Telephony3.1.4IP Telephony IP TelephonyIP Telephony IP Telephony IP TelephonyPulver.com IP Telephony Voice on the Net CoalitionVON61 IP Telephony1996 9 26 240 IP TelephonyTalking NetVoice on the NetVON 2 International Data GroupIDG62Vortex9863 1998 5 Com CiscoLucentMCI Vortex Advisory Board 200 3.1.5 IP IP Telephony 1,2 WDMWavelength Division Multiplexing DWDMDense Wavelength Division Multiplexing IP IP Telephony 43 .44 .45 .46 .47 .48 .49 .50 .51 .52 .53 .54 .55 .56 .57 .58 .59 .60 .61 .62 .63 .GLOCOM Review 3:7/812 Qwest CommunicationsInternationalQwest641998 3 LCI InternationalLCI65 4 Qwest 1999 16,000 125 48 96 10 Qwest AT&T66MCI WorldCom67Sprint683 Level3 CommunicationsLevel369WilliamsCommunicationsWilliams70 2000 Level3 IP IP IP TelephonyQoS RSVP RSVP IP Qwest 13 ISP EUnet71 IP IP ISP IP IP Telephony3.1.6IPv6 IPv6 IP IPv6 128 1 1,00072 32 IPv4 IP IP IP IP IPv6 IP IP IP IPv6 3.2IP Telephony 3.2.1IP Telephony 64 .65 .66 .67 WorldCom: .68 .69 .70 .71 .72 1 1 1 GLOCOM Review 3:7/813 1 0.020.08 0.040.16 ITSP 1 5 IDT 1 1 1 5 ITSP ISP 73 IP 1996 3 ACTAAmerica's Carriers Telecommunication AssociationITSP FCCFederal Communications Commission74 FCC 7ISP ITSP 1998 4 FCC ITSP IP Telephony Pulver.com75VocalTecIDTITXCInternet Telephony eXchange Carrier76FCC Pulver.com FCC 23 IP TelephonyPulver1998 EUEuropean Union77PCPC PC EU EU 1998 1 EU 2000 1 1 EU1998Reuters19983.2.2ISP 1 73 FCC Enhansed Servide Provider74 .75 .76 .77 .GLOCOM Review 3:7/814 4050 ISP 19.95ISP 1998 ISP IBM78 19.95 100 19.95 100 1.95AT&T WorldNet 150 19.95 100 99 ISP UUNET PC4. IP Telephony IP Telephony IP Telephony4.1 IP Telephony 4 ISP IP Telephony IP ITSP 4.1.1ISP ISP 1997 ISP IP Telephony TeleportCommunications GroupTCG79 ISP CERFnet 1997TCG CERFnet80 1998 3 CERFtone1 TCG 1998 AT&T ICG Communications811998 1 ISP Netcom82 1998 166 IP TelephonyFax VPN 78 .79 .80 .81 .82 .GLOCOM Review 3:7/815 ICG 5.9 7.2 2 ISP M&A 4.1.2 IP Telephony ITSP IP TelephonyTier1 ISP 10 IP TelephonyAT&T 1998 5 AT&T Connect'N Save83 7.5 8 8.5 2550100 3 1 45 AT&T One Rate International Plan50 MCI US West84 IP TelephonyWard19984.1.3 IP Qwest 1998 2 Q. Talk IP IP TelephonyQ. Talk 1 7.5 6 1998 25 1999 125 IP Level3 Williams IP IP TelephonyLevel3 IP Telephony IP Williams 11,000 2001 27 32,000 IP IP Telephony4.1.4 ITSP ITSP 185 ITSP IDT 83 .84 .85 500 IDT 270 GLOCOM Review 3:7/816 DC 50 5 800 86 13 71 20 32 49 27 65 87 IDT IDT 1998 5 IDT IP TelephonyNet2Phone IBM 88 IBM Net2Phone 8 IDT 75 IBM Net2PhoneDelta389800 20 81 35 19 30 48 69 IDT 90 Delta3 RSL Communications91 250 Delta3 RSL Communications IP TelephonyDelta3 1998 5 1998 14 40 Delta3 Internet Phone Lite92 240 PCITXC AT&T WorldNet 1997 7 ITSP ITXC ITSP 1998 4 86 NTT 87 88 .89 .90 Delta3 Delta391 .92 Internet Phone Lite GLOCOM Review 3:7/817WWeXchange ITSP ITXC ITSPWWeXchangeITSP Network ofIP Telephony Networks Delta3 VIP Calling93 15 WWeXchange ITXC 1998 5 Intel VocalTec Chase Capital Partners94 1,000 954.2 1997 8 ISP ISP IPTelephonyISPITSP 3 4.2.1ISPITSP ISP 1997 8 90 3 10 1997 5 6 Global Exchange CarrierGXC96 23GXC IP Telephony Vienna Systems ISP IP TelephonyAT&T ISP AT&T Jens971997 8 IP TelephonyAT&T@phone98 99 3 AT&T Jens AT&T@phone AT&T 1998 5 99100PC 1997 10 27.0 IDT IDT PC Net2Phone 93 .94 .95 .96 .97 .98 .99 .100 .GLOCOM Review 3:7/8184.2.2ISP 1011998 5 26 Nifty Serve 168 Nifty Serve 3,000 Nifty Serve RSLRSL Communications IP TelephonyIP TelephonyNTT 1997 6 NTT NTT NTT NTT 1021998 4 ITSP IPTelephony Inter-Tel IP Glocalnet103 Telbatelecomunicacoes104 IP TelephonyNTT NTT 105 ARCSTARIP Fax IP-VPN KDD KDD KCOM106KCOM 1998 4 KCOM 1997 7 9 Fax 3 450 KCOM 3 90 500KDD 1/5 KDD NTT ITXC6 1998 4 KDD KDD 107OK 180 3 *8131 101 .102 .103 .104 .105 .106 .107 .GLOCOM Review 3:7/81919984.2.3 IP TelephonyNEC 108 VoIP 109 PBXE-3200 ISS110 IP Telephony 111 1997 IP Telephony BusinessWorksVoIP Internet Telephony ServerCTI Internet Call CenterWWW Fax INTUITY AUDIXMultimedia Messaging System 3 IP TelephonyIP Telephony VocalTec 1998 3 112113 2 114 1998 4 FRAD Frame RelayAssembly/Disassembly6560MPR PROVANGUARD 320 VoIP Voice over Frame RelayVoFR VoIP VoIP VoFR VoFR VoIP PBX PBX T1 1.5Mbps TTC 2Mbps NEC T1 PBX TTC 4.3EU 1998 1 IP Telephony1151997 8 VocalTec 21.11161998 4 T-NetCall 108 .109 .110 .111 .112 .113 .114 .115 .116 .GLOCOM Review 3:7/820117 20 118 19 99 FT1191998 3 IP Telephony FT FT IP Telephony FT 3 IP Telephony FT Cukier1998 France Telecom InteractiveFTI120eFusion121 eStream FT Wanadoo IP TelephonyFT IP Telephony 1998 6 IP TelephonyVoice onthe NetVONEurope '981226 8 11 3 IP Telephony IP Telephony IP Telephony4.4 IP TelephonyKhanna and Repentigny1997b4.4.1 ISP iNET1231998 3 IP Telephony 4555390 0.25 450 580 117 .118 20 119 .120 .121 .122 .123 .GLOCOM Review 3:7/821720 850 1998 124 IP Telephony Samsung Electronics125 Sungmi Telecom Electronics126Korea Telecom1274.4.21997 Computer Protocol128Fax DSPDigital Signal ProcessorCpIP Voice GatewayCpIP Voice Gateway FCCEU 4.4.3 Lucent PT. Telkomunikasi IndonesiaPT.Telkom129PT Telekom 9,000 IP Telephony PT.Indonesia Satellite CorporationPT. Indosat1301997 4 Global Link131IP Telephony1324.4.4 ISP OzEmail133OzEmail Phone13415 1.25 5.50 25 4.4.5Telecom New ZealandTNZ135 1996 VocalTec IP Telephony1997 1 31 1361998 5 4.4.6 124 125 .126 .127 .128 .129 .130 .131 .132 .133 .134 .135 .136 .GLOCOM Review 3:7/822 Taiwan Telecommunications Network ServiceTTN137IP Telephony VocalTec 5.IP Telephony IP TelephonyIP TelephonyFaxIP TelephonyIP TelephonyPCPC PC IPTelephony 5.1AT&T Jens AT&T@phone ID PIN NTT ID 1 AT&TJens ID 138NTT 7 139Fax 1 Fax Fax NTT WebDeFax140 InfoImaging Technologies141142 Aplio143Aplio/Phone IP Telephony 1997 11 ISP 1 199 2 137 .138AT&T@phone 186139.140 WWW FAX 141 .142 FAX 143 GLOCOM Review 3:7/823 379 Dunn19981998 H.323 H.323 InnoMedia1441997 11 InfoTalk ISP IP Telephony1 279.95 Aplio/Phone ISP 5.2IP Telephony IP QoS 5.2.1QoS QoS IP QoS RSVPresource ReSerVation Protocol RSVP Packeteer145PacketShaperVoIPRSVPRSVP IP RSVP QoS 3 IP TOSType Of Service6 4 QoS 2 IETF 3 MPLSMuti-Protocol Label Switching TOS ATM QoS WIDE NEC IPv6QoS IPv6 015 144 145 TTL FVer HL TOS IP IP Precedence D T R 05 6 DelayThroughputReliability 8 VerHLFTTLTime To live 2TOS 1998p.98 2-7GLOCOM Review 3:7/824 815 5.2.2IPUDPRTP 3 40 5 5.2.3PC PC PC PC Quicknet Technologies1461997 3 ISA Internet PhoneJACK1 200 NetMeeting IPTelephony DSP PC CPU 5.3H.323 PCPC PCInteroperabilityH.323 H.323 1996 ITU-T- Study Group 15 IP H.323 3147 146 147 1997p.116 DataBeam LAN IPTCP UDPT.123H.245Q.931RASRTP, RTCPT.122, 125T.124T.Share T.126 T.127G.711G.722G.723.1G.728G.729annex AH.261H.263 H.323 3.H.323 GLOCOM Review 3:7/8255.3.1H.323 H.323 10 H.323 G.71164kb/s G.723.16.3kb/s5.3kb/sG.7298kb/sG.711 G.723.1 G.729 H.261 H.263H.263 H.261 Huffman H.261 H.263 VideoconferencingPicture FormatImage SizeIn PixelsH.261 H.263Sub-QCIF 12896 Optional RequiredQCIF 17644 Required RequiredCIF 352288 Optional Optional4CIF 702576 N/A Optional16CIF 1,4081,152 N/A Optional 5ITU Formats for Videoconferencing148H.323 CALL H.245 Q.931 RASRegistration, Administration, Status 3 H.245 H.323 Q.931 RAS 149H.323 H.323 H.323 H.323 148 DataBeam DataBeam LotusIBM1998 5 149 RAS LAN IP GLOCOM Review 3:7/826H.323 3 H.323 H.323 H.323 H.323 H.323 H.323 H.32x 6 H.320 ISDNH.324 LAN H.32x 4GLOCOM Review 3:7/827H.320 H.321 H.322H.323H.324Approval Date 1990 1995 1995 1996 1996Network Narrowbandswitched digitalISDNBroadbandISDN,ATM LANGuaranteedbandwidth packetswitchednetworksNon-guaranteedbandwidth packetswitchednetworks(Ethernet)PSTN or POTS,the analog phonesystemVideo H.261, H.263 H.261, H.263 H.261, H.263 H.261, H.263 H.261, H.263Audio G.711G.722G.728G.711G.722G.728G.711G.722G.728G.711G.722G.723G.728G.729G.723Multiplexing H.221 H.221 H.221 H.225.0 H.223Control H.230H.242H.242 H.230H.242H.245 H.245Multipoint H.231H.243H.231H.243H.231H.243H.323Data T.120 T.120 T.120 T.120 T.120CommonInterfaceI.400 AALI.363AJM I.361PHY I.400I.400&TCP/IP TCP/IP V.34 Modem 6H.32x 150 IP Telephony IP H.323 H.235 150 DataBeam H.323H.320H.323H.324 ISDN H.324 H.320 H.323 4.H.32x GLOCOM Review 3:7/8285.3.2H.323 H.323 ITU IP TelephonyH.323 PC IP TelephonyH.323 IP TelephonyG.729 annex A 8kb/s AT&T G.723.1 6.3kb/s 5.3kb/sIntelMicrosoft 2 G.723.1 G.729 annex A G.729 annex A CS-ACELPConjugate Structure Algebraic Code Excited Liner PredictiveG.723.1 G.723.1 30ms G.729 annex A 10msPC IP Telephony H.323 ITU International MultimediaTeleconferencing ConsortiumIMTC1511996 3 Event-120ITU T.120 Intel Microsoft 100 IP Telephony152 IP TelephonyIMTC IMTC 1 Voice over IPVoIPForum15340 H.323 VoIP Forum 1997 5 G.723.1 1545.3.3IP Telephony Memorandum of UnderstandingMoU1998 4 AT&TITXCVocalTecBellcore MoU IP TelephonyIP Telephony MoU155IP Telephony CDRCall Data Record 1998 9CDR CDR CDR IP Telephony IP CDR ITU 151 .152 .153 1996 5 10 IMTC .154 .155 .GLOCOM Review 3:7/8296IP Telephony IP TelephonyIP TelephonyFrost & Sullivan IP Telephony 1995 180 1996 997 2001 IP Telephony 18 9,000 Khanna and Repentigny1997aEconomist 156 IP Telephony 0.47 15 252003 IP Telephony ISP 70 2001 100 157VONIP Telephony 1997 1 5,0001998 2 2,500 3 2000 25 Mitchell1998 Net Insider TechWeb Internet2001 2002 1530 IP IP 5 7 PSTN IP IP Telephony2002 20 158Killen & Associates159IP Telephony1997 7 4,1002002 630 2002 IP Telephony 4833IDCInternational Data Corporation160 24161 IDC IP Telephony 1995 350 1999 5 6,000 Tarifica 2001 AT&T 6 2,000 9 5,000 A PhoneZone.Com1997Forrester 2002 10 2004 20 10 1998 1999 2000 2001 2002 2003 2004 156 .157 "Internet Telephony. Growing up." The Economist. May 2, 1998.158 .159 .160 .161 Aplio Market OpportunityGLOCOM Review 3:7/830Frost & Sullivan 18.9*Ecconomist 70Jeff Pulver 2.253 25 20*Killen & Associates 630IDT 5.6Forrester 10 20 7IP Telephony* IP Telephony7IP Telephony IP ITSP VONIntermediary H.323 VoIP IP Telephony 5 1RSVP 100 PSTN IP VPNVirtual Private Network IP TelephonyDWDM QwestLevel3Williams IP IP Telephony IP NGINext Generation Network Internet2 IP Telephony IP RSVP RSVP ISP 2GLOCOM Review 3:7/831 IP Telephony 2 1 21 1997 IP MCI 2010 90 101998 IP 2 incumbent IP Telephony 12 3 Fax CTI Fax Fax Fax store and forwardG3 Fax Fax Fax 1.4 Fax CTI WECC WECC l "Comparative Analysis of Internet Telephony Gateways." A PhoneZone.Com Tutorial.October 1997. .GLOCOM Review 3:7/832l Cukier, Kenneth. "Is it for you?" CommunicationsWeek International. May 4, 1998..l deJong, Jennifer. Customer Service moves to the Web. Netscape Enterprise Developer.March 5, 1998. .l Dresner, Steven. "Internet Telephony: More Than Just Voice on the Net." TeleprofessionalMagazine July/August 1997. .l Dunn, Ashley. "More Phone, Less Computer, Behind New Generation on Internet Phone."CyberTimes, The New York Times on the Web, January 7, 1998.l EU. "Status of voice on the Internet under Directive 90/388/EEC." Official Journal No. C6,January 10, 1998. p. 4. .l BP1998 6 1 No.271pp.76-101l "Internet Telephony. Growing up." The Economist. May 2, 1998.l Khanna, Kiran and Franois de Repentigny. "Internet Telephony: Form and Functionality."July 1997. Frost & Sullivan. .l and. "Internet Telephony: An Opportunity forAsia?" July 1997. Frost & Sullivan. .l 1997 BP1997 11 3 No.257pp.98-117l 1996 BP1996 11 4 No.233pp.90-110l 1998USIT NIKKEI MAIL Cyber1998 5 7 Eveningl 1998VoicePHP 1998 6 l Mitchell, Dan. "Is IP Telephony a Real Threat to Telcos?" Herring Communications.February 12, 1998.l 1998 BP1998 5 18 No.270pp.90-108l "Net phones not subject to EU rules." Reuters, Special to CNET NEWS.COM January 13,1998. .l Pulver, Jeff. Interviewed by John Boland. TechWeb Internet 1998..l 1998 BP1998 5 No.10pp.72-93l 1998NEWS WATCH BP1998 4 20 No.268p.96l 1998Focus on FAXBP1998 4 6 No.267pp.136-144l 1998 1 10 .l Ward, Jacob. "Net Calls Look Good - For Now." The Industry Standard. May 11, 1998..IP Telephony MLl Dialogic WorldView IP Telephony:.MLl High Bandwidth Web Page **Video on the Net**: .l ISW: .l Internet Telephony, Internet Telecommunications Project:GLOCOM Review 3:7/833.l Internet telephony, VON: .l Internet Telephony & Fax, Instant Search:l .l IP xStream: .ML l Tele.com: .l The Internet Telephony ConsortiumITC, MIT: .l The X over IP News, Pulver.com: . ML