Voice over IP Challenges and Opportunities IP-Tel 2000 Berlin, Apr. 2000 Wilhelm Wimmreuter SIEMENS AG ICN SIB mailto: W

1. Voice over IPChallenges and OpportunitiesIP-Tel 2000Berlin, Apr. 2000Wilhelm WimmreuterSIEMENS AG ICN SIBmailto: Wilhelm.wimmreuter@icn.siemens.de

2. Cold colours Voice over IPChallenges & Opportunities Warm colours • Introduction • Towards converged Voice and data networks? • Services • Challenges • Opportunities • Evolution of Networks

3. POP POP R POP Internet POP POP POP R R LE LE POP TE POP R ATM SDH ATM SDH LE TE LE LE LE Telephony & Internet TE LE TE LE Telephony Cold colours Towards Converged Voice & Data Networks Warm colours Convergence: • Provides shared Access, Transport, and Services • Shared Resources reduce Costs for Management of Networks & Services • New Services and their Global Distribution; Voice & Data • End Users have Services at their Fingertips from Anywhere in the World

4. Cold colours VoIP Driving Services Warm colours • IP-Telephony is lurking around the corner, waiting for integration • IP Phones / Workstations, CO, PABX ... • IP Conferencing, Call Centers • IP Telephony services; Call Waiting Internet ... • IP Collaborative Work... And others to be invented • Always - On: Enables a potential paradigm shift, providing the possibility to purchase different levels of network bandwidth as needed, whilst always being connected. • Combining new with existing technologies for the transitional phase to a fully deployed IP network, by using, for example PINT • For the foreseeable future, to protect investment, "Steam Phones" • must have their place in IP-Telephony.

5. Cold colours VoIP Challenges Warm colours • Justifiable business models for the provision of high bandwidth IP networks are `elusive´ when solely considering IP telephony • Business models for billing of VoIP have yet to be defined • Network and subscriber management is still to be unified • Security changes from "trust by wire" to "trust by authentication" • Incumbent network operator resistance • Services will propagate throughout the network and to the customer premises • Network operators at present receive income from services and for providing Network Access. They may have to share service income with others in future.

6. Cold colours VoIP Opportunities Warm colours • End to End IP throughout the global network(Reduction of management costs ...) • New services can be provided by operators without their own networks • Selling services to virtually anyone (Operators and Users) • Services will be available everywhere • Security infrastructure enables new services globally • Global directories of services is a new opportunity • Highly availability can be provided in different ways • The number of services will grow, and grow, and ...

7. Embedded Call Control UNI I/F IX1000, 3Com SS7 sig. SS7 sig. SS7 sig. All in oneGwy Internet Internet UNI:BRI, PRI .. Call Ctrl.Gk External Call Control UNI & NNI: IX 2110, & others Ext. Call CtrlGwy UNI/NNI:BRI PRI CAS SS7-FAC.. Shared Services & Ext. Call Ctrl. UNI & NNI: IX 2110, Castle, Surpas, SRS3000, & others(existing Gwys reused, MGCP...) Call Ctrl.Gk IN Services IP Services CPEGwy Ext. Call CtrlGwy Internet UNI/NNI:BRI PRI CAS SS7 ... Media; Signaling Cold colours VoIP evolution of interworking ... towards Shared-Services Warm colours

8. Cold colours VoIP reliably delivering the future Warm colours • The world is looking for IP based networks • There will be big changes in service provision and usage • For new operators IP networks are "the way to go"; Existing operators need a smooth migration path.We aim to provide for both. • We provide the integrated solution... • ...for the whole story