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IP Telephony Helmut Schink

IP Telephony Helmut Schink. helmut.schink@icn.siemens.de +49 89 722 44523 Siemens AG ICN M CS 21 81359 München Hofmannstr. 51. Content. 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing. Telephone total.

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IP Telephony Helmut Schink

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  1. IP Telephony Helmut Schink helmut.schink@icn.siemens.de +49 89 722 44523 Siemens AG ICN M CS 21 81359 München Hofmannstr. 51

  2. Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing

  3. Telephone total Driver for tomorrow’s communicationBitrate growth in data networks is higher Total average bitrate 106 Gbit/s 103 1 10-3 Internet 10-6 1985 1990 1995 2000 2005 2010 2015 2020 Year Source: ICN M CM, ITU, ISOC ð The internet becomes a second universal network besides the voice network.

  4. 10 % 7% 5 % 3% < 1% 1998 2003 2005 Driver for tomorrow’s communicationVoice stays the main revenue generator Revenues*) in Billion DM Voice over IP Market Share *) 406 400 334 29% 350 300 25% 244 250 20% 200 150 100 0 50 0 1993 1998 2003 *) VoIP global call minutes as percentage of VoTDM global call minutes.The Impact on Telco Services and Revenues, OVUM Ltd. 1998 Data & VAS Voice CATV *) Revenue for Telecom Services in Western Europe Source: ICN M CM ð Voice service is lucrative for voice and data network providers

  5. Driver for tomorrow’s communicationThe competition will be decided on services and price • With New Services • conquer new markets • differentiate from competition • generate additonal revenues Revenues p. Y. (in Bill. ECU) * 90 110 180 280 100% 13% 17% 30% • Traditional Services • offered by all providers • increased price competition 45% 80% 60% Services are the key to voice/data success. They ... • save time and money • increase convenience for the end user • generate additional call minutes • are directly marketable • create direct revenues • promote subscriber loyalty • provide a competitive edge in deregulated markets 40% 87% 83% 70% 55% 20% 0 1990 1995 2000 2005 * Revenues in Europe Source: ICN M CM ð The key to voice/data success lies in advanced multimedia services and applications

  6. Operators’ Rating of Drivers for Voice over IP average of all surveyed operators not important very important 1 2 3 4 5 6 Offering new and advanced services Cost savings through efficiency of unified network Cost savings through more bandwidth efficiency VoIP as an additional, low-cost service Market pull from business customers Avoidance of interconnection cost Growing competitive pressure through VoIP Market pull from residential customers Offloading peak traffic from the trad. voice n/w Improved customer retention (for ISPs only) Charge usage-based instead of flat rate (for ISPs only) Interview basis: 16 Operators’ Motivation to Deploy VoIP Services

  7. Expected GW Features Which features do operators expect ? (multiple votes per operator possible) SS7 Single-stage-dialing ISUP transparency Automatic Fax handling IP QoS features Automatic Modem handling Automatic DTMF handling Availability 99.999% Line Redundancy PSTN fallback incorporate in VoIP equipment IVR (interactive voice response) CO environmental conditions CO rack integration (size) Speech recognition (-> prepaid account) CO power supply Additional voice compression standards Connectivitywith PSTN 15 answers total 0 4 8 12 Number of votes needed now needed in 2 years

  8. Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing

  9. Access isolated in eachAdministrative Domain Access open across Administrative Domains Gatekeeper- / Telephony-Domain LocationServices TIPHON IP Phone IP Telephony-LocationServices IPTEL Gwy. IP Network Trust CenterServices PSTN / IN Clearing HouseBillingServices Small EnterpriseTel. & IP Services e.g. Vocaltec ManagementServicesSNMP... INServices Decentralized Services

  10. Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing

  11. Attraktive Internet Features Subscriber Controlled Input via Internet (ISCI) E-Mail Waiting Indication (EWI) Call Waiting Internet Busy (CWIB) Call Completion Internet Busy (CCIB) Voice over Internet (VoI) Improved Voice-over-Internet (IVoI)

  12. CCIB: Functional Principle Internet PSTN/ISDN InterNode Switch Core Content Provider Server / Router IPOP Forward Modem / VoIP - Process Set-up VoIP call Switch

  13. WCC: Service web VoIP/CCIBor telephone ISP(User) ISP(Agent) Webserver(e.g. archive) Web Call Center EWSD INTERNODEswitching system • WCC contolls data- and voice- connection

  14. Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing

  15. Gatekeeper Pricing Protocol: Overview 5 SETUP Gateway Gateway 1 4 6 OperatorA ARQ 7 ACF ARQ OperatorB ACF IP Network Gatekeeper Gatekeeper 3 AuthRsp 2 AuthReq Clearinghouse Service

  16. Management: Trust And Authentication Services • "Trust by Wire" to "Trust by Authentication" • Trusted authorities must be deployed • e.g.: Trust centers issue security certificates / tokens • Telco's are traditionally trusted • Operation of trust centers generates new income (Verisign..) • None repudiation evidence gathering • Trust centers can verify, trace and store CLI information forlater proof. This is currently a problem in IP networks • . . .

  17. Telephone User Habits / Paradigms: • Do users want anything but dial? • Transparency for Today’s Devices Required? • e.g.: G.3 FAX, modem, look and feel, RJ11 plug • Real-time Billing • e.g.: Coinboxes, Prepaid-Cards, and hotel billing • Connection Setup Time • Is location finding fast enough? • Call Blocking (Non Payment, 3rd Party ...) • What are the requirements that can not be handled? • . . .

  18. Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing

  19. ITU-T SG 16 concentrates on Multimedia Terminals and Security; develops IP Telephony Standard H.323; TIPHON provides input for this group. (www.itu.org) International Telecomm. Union IETF investigates interworking between Internet and Intelligent Networks. TIPHON influences via member organizations. (www.ietf.org) Internet Engineering Task Force TIPHON/ETSI is globally accepted as leading body for internet gateway standardization. (www.etsi.org/tiphon) TIPHON Standardization

  20. Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing

  21. OPEN I/Fs SURPASS hiQ Applic. Server Supporting Server (e.g. ISCI) AAA Routing Routing Server Data Base RAS VoIP SURPASS hiG 1000 EWSD CO SURPASS hiA VoATM Access SURPASS hiG 2000 Siemens evolutionary strategy for carriers From EWSD to SURPASS with an open architecture EWSD proprietary i/fs • Voice Features • Call Control • Access Siemens’ leverage: the large installed base and best in class voice features. Market requires: Open interfaces and decoupling of control and transport.

  22. Open API for external applications Registration and Routing Server SURPASS hiQ Open Platform with standard interfaces SURPASS hiQ open platform

  23. PBX LNP SCP IN RAS IP / ATM backbone VoIP Edge Router Switch Switch Switch Core Router VoATM PSTN/ISDN network other carrier Gateway POTS/ISDN subscriber Multiservice Access – SURPASS hiA Call Feature Server, Media Gateway Controller INAP Network Servers AAA Server, Reg. & Routing Server Open API SoHo residential Access xDSL TDM POTS/ISDN subscriber ATM, FR/LL SURPASS hiA SM/L Enterprise

  24. BSC GSM Public Operator Abis OMC-B BTS SGSN MSC HLR BTS OAM Gateway E+G If MCU Abis MSCGateway QoS LANWANCorporateIP network Router WARP GPRSGateway Pico BTSServer Internet H.323 Terminal Firewall PBXNetwork PSTNISDN PBXGateway Servere.g. Voicemail,Directory ISDN PRA H.323 / GSMGatekeeper OAM Siemens Corporate GSM Solution

  25. Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing

  26. Analog loop Servers: RADIUS, SIP, H.323, Media, policy A/D PSTN A/D Modems IP Router Trunks to Internet A/D xDSL M xDSL loop IPTel Gwy Trunks toPSTN A/D Cable Head M Via cable IP Router Trunks toSIP, H.323 net Clean IP Switch orGigabit Ethernet cluster Visions: Is IP switching the solution for voice?

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