1. Multiservice Data Networks R. Jayanthan. Kithsiri Gunasekara. 17 th National Information Technology Conference 1998

2. Multiservice Data Networks Types of Network traffic n Voice / Fax n Multi Protocol LAN traffic n Synchronous data n Asynchronous data n Video and Multimedia

3. Multiservice Data Networks Multiservice Network Multiservice Network What is Multiservice ? Voice / Fax LAN Traffic Synchronous Data Asynchronous Data Video & Multimedia Different Bandwidth and Network Latency Requirements Integration of multiple kind of communication into a single Network

4. Multiservice Data Networks Why Multiservice ? n Lower communication cost n Better bandwidth utilisation n Integrated Management n Enhanced Value Added Services

5. Multiservice Data Networks Application of Multiservice n Remote office connectivity n Corporate Networks n Service Provider Networks

6. Multiservice Data Networks Remote Office Connectivity PBX LAN Router Host Multiplexer Head Office To Branch Office

7. Multiservice Data Networks Corporate Networks n Voice / Fax n Enterprise Messaging n Workflow Automation n Intranet n Internet Access Service Network M/R

8. Multiservice Data Networks Service Provider Networks n Multiservice capability n High speed backbone n Assurance of Quality of Service n Efficient bandwidth utilisation n Integrated Management of Resources

9. Multiservice Data Networks Key Technologies Asynchronous Transfer Mode (ATM) - A Broadband Backbone Technology. Asynchronous Transfer Mode (ATM) - A Broadband Backbone Technology. Frame Relay - A Multiservice Access Technology. Frame Relay - A Multiservice Access Technology.

10. Multiservice Data Networks Asynchronous Transfer Mode n Capable of carrying Voice, data & Video n High speed switching n Makes best use of available bandwidth n 155 Mbps transmission speed n Suitable for Backbones ATM is now defined for E1 and E3 data rates as well

11. Multiservice Data Networks Frame Relay n Packet switching technology n Less latency than X.25 n Multiple Data Link Connection over single physical link n Quality of Service Assurance n Best suitable for Last Mile Access

12. Multiservice Data Networks X.25 Sync Async Frame Relay IP Services LAN ATM Video Packet Switch PAD FRAD Router/ ATM Switch Network Architecture ATM FR

13. Multiservice Data Networks Multiservise Data Networks n Lower Communication Costs n Better Bandwidth Management n Assurance of Quality of Service n Flexible Tariff Structures n Provision of Value Added Services n Integrated Network Management

14. Multiservice Data Networks Conclusion n Multiservice Data Networks are the way forward to meet the communication requirements of Sri Lanka in the next Millennium

15. Multiservice Data Networks Thank You

16. Multiservice Data Networks Data Compression Voice (Eg. G.729 => 8kbps) Voice (Eg. G.729 => 8kbps) LAN (Bursty in nature) LAN (Bursty in nature) Sync (Sync Spoofing) Sync (Sync Spoofing) Async (Bursty in nature) Async (Bursty in nature) Data Compression is used to save bandwidth