October 16, 1998 (1) ICNP’98CSELT Panel Session Internet Telephony the next killer application? Eugenio Guarene CSELT

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the next killer application?
Presentation transcript:

October 16, 1998 (1) ICNP’98CSELT Panel Session Internet Telephony the next killer application? Eugenio Guarene CSELT

October 16, 1998 (2) ICNP’98CSELT Voice over IP services Internet Telephony PC-to-PC PC-to-Phone Phone-to-Phone IP-Fax Value added services Call centres CSCW Web help desk Voice/data integration Corporate

October 16, 1998 (3) ICNP’98CSELT Basic elements for a service architecture PSTN Vocal Gateway Network Mgmt Billing Server Client PC Gatekeeper Directory Server Messaging Server, VAS Vocal Gateway IP network Client PC

October 16, 1998 (4) ICNP’98CSELT Protocol efficiency: RTP/UDP/IP IP header UDP header RTP header V=2PXCCMPT Sequence Number Time Stamp Synchronization SouRCe (SSRC) identifier Source PortDestination Port Message LengthChecksum (optional) Source Address Destination Address VersionHLenTOSTotal Length IdentificationFFragment Offset TTLProtocolHeader Checksum Payload 5 words 20 bytes 2 words 8 bytes 3 words 12 bytes

October 16, 1998 (5) ICNP’98CSELT Bandwidth and statistical multiplexing Time (sec) Bandwidth (kbit/s) Measured in a window of 250ms

October 16, 1998 (6) ICNP’98CSELT Dalay budget Frame Look Ahead Frame Look Ahead TX processing Network RX buffering RX processing Coder TX Contribution RX contribution Originated by the network total delay

October 16, 1998 (7) ICNP’98CSELT PBX Network delay and jitter control R GW PBX R GW IP WAN Voice PktData Pkt

October 16, 1998 (8) ICNP’98CSELT Sea Bulk Phone I s r a e l Internet International PSTN R u s s i a I n d i a Access of multiservice carriers to SEA-BONE SEA-BONE Internet trunks PSTN trunks Local and regional Service Providers R IWF INTL EXCH

October 16, 1998 (9) ICNP’98CSELT Sea Bulk Phone SBP Server GW GK ITSP LocalPSTN GK GW ITSP LocalPSTN GK GW B A Internet “Internet Quality” ITSP “Toll Quality” A SEA BONE International PSTN Billing

October 16, 1998 (10) ICNP’98CSELT Product evaluation A:Core End side PSTN interfaceB:Core End side implementationC:Edge End side - PSTN Interface D:Edge End side ImplementationE:Voice Transport TechniquesF:Routing of Calls G: Networking Security IssuesH:Voice coding & QoS performanceI:Network management J: Service managementK: Equipment requirementsL:End-user service feature M:Organizational & technical assistance

October 16, 1998 (11) ICNP’98CSELT Corporate Communications Corporate Backbone IP WAN --> Internet LAN ATM/FR WAN LAN Headquarter R R X R PC R X R X R NAS SOHO Remote Site Dial-up User WS PABX PSTN ISDN

October 16, 1998 (12) ICNP’98CSELT Voice-data integration Corporate Backbone IP WAN --> Internet LAN ATM/FR WAN LAN Headquarter R R X R PC X X R NAS SOHO Remote Site Dial-up User WS PABX PSTN ISDN VGW R R PABX

October 16, 1998 (13) ICNP’98CSELT PABX-less company Corporate Backbone LAN ATM/FR WAN LAN Headquarter R R X R PC X X R SOHO Remote Site Dial-up User WS R R PSTN ISDN VGW IP WAN --> Internet NAS

October 16, 1998 (14) ICNP’98CSELT LAN CO Server Internet GW Router Local PoP Merchant central site Web server Local stores Voice-data application: an example PPP to IP gateway

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