s IP Telephony Helmut Schink helmut schinkicn siemens

s IP Telephony Helmut Schink helmut. schink@icn. siemens. de +49 89 722 44523 Siemens AG ICN M CS 21 81359 München Hofmannstr. 51 ITU Workshop on IP Telephony, Geneva, June 2000 1

s Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing ITU Workshop on IP Telephony, Geneva, June 2000 2

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

s Driver for tomorrow’s communication Voice stays the main revenue generator Revenues*) in Billion DM 400 350 300 250 200 150 100 50 0 Voice over IP Market Share *) 406 334 10 % 29% 25% 244 20% 5% 0 1993 Voice 7% 1998 CATV 2003 Data & VAS *) Revenue for Telecom Services in Western Europe Source: ICN M CM 3% < 1% 1998 2003 2005 *) Vo. IP global call minutes as percentage of Vo. TDM global call minutes. The Impact on Telco Services and Revenues, OVUM Ltd. 1998 ð Voice service is lucrative for voice and data network providers ITU Workshop on IP Telephony, Geneva, June 2000 4

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

s Operators’ Motivation to Deploy Vo. IP Services Operators’ Rating of Drivers for Voice over IP average of all surveyed operators Offering new and advanced services very important 1 2 3 4 not important 5 6 Cost savings through efficiency of unified network Cost savings through more bandwidth efficiency Vo. IP as an additional, low-cost service Market pull from business customers Avoidance of interconnection cost Growing competitive pressure through Vo. IP 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) ITU Workshop on IP Telephony, Geneva, June 2000 Interview basis: 16 6

s Expected GW Features Which features do operators expect ? (multiple votes per operator possible) 15 answers total Connectivity with PSTN SS 7 Single-stage-dialing ISUP transparency Automatic Fax handling IP Qo. S features Automatic Modem handling Automatic DTMF handling Availability 99. 999% Line Redundancy PSTN fallback incorporate in Vo. IP equipment IVR (interactive voice response) CO environmental conditions CO rack integration (size) Speech recognition (-> prepaid account) CO power supply Additional voice compression standards 0 needed now ITU Workshop on IP Telephony, Geneva, June 2000 4 8 12 Number of votes needed in 2 years 7

s Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing ITU Workshop on IP Telephony, Geneva, June 2000 8

s Decentralized Services Access isolated in each Administrative Domain Access open across Administrative Domains IP Phone Gwy. IP Telephony. Location Services IPTEL IP Network Trust Center Services PSTN / IN IN Services Gatekeeper- / Telephony. Domain Location Services TIPHON Small Enterprise Tel. & IP Services e. g. Vocaltec ITU Workshop on IP Telephony, Geneva, June 2000 Management Services SNMP. . . Clearing House Billing Services 9

s Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing ITU Workshop on IP Telephony, Geneva, June 2000 10

s 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 (Vo. I) Improved Voice-over-Internet (IVo. I) ITU Workshop on IP Telephony, Geneva, June 2000 11

s CCIB: Functional Principle Internet PSTN/ISDN Switch Core Inter. Node Forward Set-up Vo. IP call IPOP Server / Router Content Provider Modem / Vo. IP Process Switch ITU Workshop on IP Telephony, Geneva, June 2000 12

s WCC: Service web Vo. IP/CCIB or telephone ISP (User) ISP (Agent) Web Call Center Webserver (e. g. archive) EWSD INTERNODE switching system • WCC contolls data- and voice- connection ITU Workshop on IP Telephony, Geneva, June 2000 13

s Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing ITU Workshop on IP Telephony, Geneva, June 2000 14

s Gatekeeper Pricing Protocol: Overview Gateway Operator A 1 ARQ 5 SETUP 4 ACF 6 ARQ Gateway 7 ACF Operator B IP Network Gatekeeper 3 Auth. Rsp 2 Auth. Req Clearinghouse Service ITU Workshop on IP Telephony, Geneva, June 2000 15

s 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 for later proof. This is currently a problem in IP networks • . . . ITU Workshop on IP Telephony, Geneva, June 2000 16

s 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, RJ 11 plug • Real-time Billing e. g. : Coinboxes, Prepaid-Cards, and hotel billing • Connection Setup Time Is location finding fast enough? • Call Blocking (Non Payment, 3 rd Party. . . ) What are the requirements that can not be handled? • . . . ITU Workshop on IP Telephony, Geneva, June 2000 17

s Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing ITU Workshop on IP Telephony, Geneva, June 2000 18

s Standardization International Telecomm. Union 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) 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) ITU Workshop on IP Telephony, Geneva, June 2000 19

s Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing ITU Workshop on IP Telephony, Geneva, June 2000 20

s Siemens evolutionary strategy for carriers From EWSD to SURPASS with an open architecture • Voice Features • Call Control • Access RAS Vo. IP EWSD CO Access Vo. ATM SURPASS hi. G 1000 SURPASS hi. G 2000 SURPASS hi. A EWSD proprietary i/fs SURPASS hi. Q Siemens’ leverage: the large installed base and best in class voice features. Market requires: Open interfaces and decoupling of control and transport. ITU Workshop on IP Telephony, Geneva, June 2000 21

s SURPASS hi. Q Open Platform with standard interfaces Open API for external applications SURPASS hi. Q open platform ITU Workshop on IP Telephony, Geneva, June 2000 Registration and Routing Server 22

s Multiservice Access – SURPASS hi. A SCP LNP INAP IN Call Feature Server, Media Gateway Controller Network Servers AAA Server, Reg. & Routing Server Open API So. Ho residential RAS TDM PSTN/ISDN network other carrier Vo. IP Switch Edge Router Vo. ATM IP / ATM backbone Access x. DSL Core Router ATM, FR/LL POTS/ISDN subscriber PBX POTS/ISDN subscriber Gateway SURPASShi. A ITU Workshop on IP Telephony, Geneva, June 2000 SM/L Enterprise 23

s Siemens Corporate GSM Solution BSC GSM Public Operator Abis OMC-B BTS MSC BTS MCU Abis WARP Router Pico BTS Server Qo. S LAN WAN Server H. 323 / GSM e. g. Voicemail, Gatekeeper PBX Gateway HLR E+G If MSC Gateway GPRS Gateway Corporate IP network H. 323 Terminal OAM Gateway SGSN Internet Firewall PBX Network ISDN PRA PSTN ISDN Directory ITU Workshop on IP Telephony, Geneva, June 2000 24

s Content 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing ITU Workshop on IP Telephony, Geneva, June 2000 25

s Visions: Is IP switching the solution for voice? A/D PSTN A/D x. DSL loop Via cable Trunks to Internet IPTel Gwy Trunks to PSTN IP Router Trunks to SIP, H. 323 net Cable Head A/D M IP Router x. DSL A/D M Servers: RADIUS, SIP, H. 323, Media, policy Modems Analog loop Clean IP Switch or Gigabit Ethernet cluster ITU Workshop on IP Telephony, Geneva, June 2000 26