Dr. Ghassem Koleyni Nortel Networks Tel: Fax:

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1 International Telecommunication Union PSTN/ISDN Emulation & Simulation Dr. Ghassem Koleyni Nortel Networks Tel: Fax: Hanoi, Vietnam, May 2006

2 Content ITU-T o o o o o o NGN and PSTN/ISDN Emulation and simulation Scenarios Services and evolution Related activities in ITU-T Conclusion Hanoi, Vietnam, May

3 NGN & PSTN/ ISDN ITU-T ocall server (CS)-based Equipment re-use Service continuity oip multimedia sub-system (IMS)-based Immediate migration Access to new services Hanoi, Vietnam, May

4 NGN: CS-based ITU-T Call Server PSTN Cable, IAD, xdsl Private Lines Wireless Packet Switched Network AN signalling VoIP PABX ISDN Hanoi, Vietnam, May

5 NGN: IMS-based ITU-T IMS Packet Switched Network Other networks signalling VoIP Other networks Hanoi, Vietnam, May

6 Emulation Provision of PSTN/ISDN service capabilities and interfaces using adaptation to an IP infrastructure. Hanoi, Vietnam, May

7 Simulation Provision of PSTN/ISDN-like service capabilities using session control over IP interfaces and infrastructure Hanoi, Vietnam, May

8 General architecture Simulation NGN (Carrier Y) PLMN User equipment User equipment NNI ADF1 NGN (Carrier X) IWF ADF1 User equipment ADF2 IWF NNI IWF ADF2 User equipment PSTN/ISDN Public IP Network, e.g. SIP (non-ims) User equipment User equipment = User Network Interface = IF1 NNI = Network Node Interface = IF2 Emulation ADF= Adaptation Function IWF=Interworking Function Hanoi, Vietnam, May

9 Emulation scenario ADF2 NGN ADF2 User equipment User equipment o An encapsulation process o All services available to PSTN/ISDN users o User experience not changed by the network transformation Hanoi, Vietnam, May

10 Simulation scenarios - 1 NGN User equipment User equipment o PSTN/ISDN-like services available o Availability of possible new services o User experience is changed by the network transformation Hanoi, Vietnam, May

11 Simulation scenarios - 2 ITU-T NGN ADF1 User equipment User equipment o Only PSTN/ISDN-like services available o New experience for legacy terminal users Hanoi, Vietnam, May

12 Emulation, simulation & interworking - 1 ITU-T NNI NGN PSTN/ISDN User equipment o Service interworking between NGN and PSTN/ISDN is required o Only PSTN/ISDN-like services available o Legacy terminal user experience cannot be fulfilled for end-to-end connection User equipment Hanoi, Vietnam, May

13 Emulation, simulation & interworking - 2 ITU-T NNI NGN IP network User equipment User equipment o Service interworking between NGN and IP network is required o Both the NGN and IP network user experiences may not be fulfilled for end-to-end connection Hanoi, Vietnam, May

14 ISDN services DDI CT CONF MSN CFB 3PTY CLIP CLIR CFNR CFU CUG PNP COLP CD CRED COLR LH AOC MCI CW REV SUB HOLD UUS Hanoi, Vietnam, May

15 Additional legacy services VPN IN Services Operator Services LNP Long Distance Wireline & Wireless Business Residential Continuity of providing services is essential Hanoi, Vietnam, May

16 Questions to ask o Have all these services been universally used by majority of the operators? o Have all these services provided value to the operators and the end users? o Are there new services provided by NGN which are as good as the old ones and some are new? o Should care be taken in selecting services for emulation or simulation? Hanoi, Vietnam, May

17 Where are we now in ITU-T? o Described emulation and simulation o Many aspects related to emulation and simulation have been considered o Emulation and simulation scenarios identified o Requirements for public interest services Hanoi, Vietnam, May

18 Future work o Examine existing services and select candidates for emulation and simulation o Identify additional service capabilities o Address OAM, management and control & signalling aspects o Identify protocols Hanoi, Vietnam, May

19 Conclusion ITU-T o Substantial progress has been made in the preparation of initial specifications addressing evolution of networks to NGN o Good progress on PSTN/ISDN emulation and simulation o More works needs to be done to complete control and signalling aspects for PSTN/ISDN evolution Hanoi, Vietnam, May

20 AN AOC ATM CCBS CD CFB CFNR CFU CLIP CLIR COLP COLR CONF CRED CS CT CUG CW DDI DSL HOLD IAD List of Acronyms Access Network IMS Advice of Charge IN Asynchronous Transfer Mode IP Completion of Calls to Busy ISDN Subscriber ISUP Call Deflection IWF Call Forwarding Busy IXC Call Forwarding No Reply LH Call Forwarding Unconditional (CFU) LNP Calling Line Identification MCI Presentation MLPP Calling Line Identification Restriction MSC Connected Line Identification MSN Presentation PLMN Connected Line Identification Restriction PNP Conference Calling PSTN Credit Card Calling QoS Call Server REV Call Transfer (CT) SIP Closed User Group SIP-I SUB Call Waiting UUS Direct-Dialling-In VoIP Digital Subscriber Line VPN Call Hold 3PTY Integrated Access Device IP Multimedia Sub-system Intelligent Network Internet Protocol Integrated Services Digital Network ISDN User Part Interworking Function IntereXchange Carrier Line Hunting Local Number Portability Malicious Call Identification Multi-Level Precedence and Preemption Mobile Switching Centre Multiple Subscriber Number Public Land Mobile Network Private Numbering Plan Public Switched Network Quality of Service Reverse Charging Session Initiation Protocol Refers to Rec. Q Sub-addressing User-to-User Signalling Voice over IP Virtual Private Network Three Party Service Hanoi, Vietnam, May

21 Thank you for your attention Hanoi, Vietnam, May

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