1. 105 Sidevõrgud IRT 4060/ IRT 0020 vooruloeng 10 / 17. nov 2004 Võrgusõlmed Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst. avo.ots@ttu.ee

2. 106 Capacity Units 1995200020052010 Gflops Gbytes Tflops Pbytes Pflops Ebytes 10e06 10e09 10e15 10e12 Mbps Backbone Gbps Backbone Tbps Backbone 10% BsBW e2e Tbps throughput e2e Gbps throughput e2e kbps t hroughput 10%BsBW Terascale Computing Gigascale Computing Petascale Computing Arvuti- ja kommunikatsioonijõudlus

3. 107 Infoülekanne Võrgurakendused Vajalik ribalaius Võimalik ribalaius Kiud Tihendatud kiud DWDM Switch, Router 128x kiu kohta 100x 10x Pudelikael Jõudluse kasv kümnendi kestel

4. 108 Switch

5. 109 Telephone Network

6. 110 Võrgukihi kommutaator

7. PBX Transformation PBX Telephony Server

8. 112 Reliability WAN Is NT as stable as a proprietary operating system? Why shouldn’t the data network be resilient enough for voice needs? Will management risk reduced service levels for telephony?

9. Contact Center Internet Unified Messaging Collaboration Applications Remote Workers johan@abc.se Dear Johan, It’s over.

10. 114 Cost Comparison STM 64 G_Ethernet The costs for Ethernet are often 1/10 of the cost for equivalent ATM or SONET bandwidth

11. 115 IP PBX Timing 0 12.5 25 50 75 100 1999 Year Percentage Less than 3,000 systems in 2004 2000200120022003200420052006 Approximately 308,000 systems in 2004 IP/PBX for less than 100 desktops IP/PBX for more than 100 desktops

12. 116 What Is VoIP? VoIP = Voice over the Internet Protocol It is not:Voice over the Internet

13. Efficiency & quality Packetsize Codec Efficiency of transport Voice quality DejitteringdelayEchocontrolHeadercompression

14. 118 User - AUser - B Loop Trunk Group Central Office - A Central Office - B Signal System 7 Data link Signal Transfer Point Transit Office Switching System Connection Through Switching Fabric Switching System

15. 119 Header Packet Payload Input Buffer Output Buffer Hdr. Trans Routing Fabric

16. 120 DNS-B (0.5.8.9.1.9.1.e164.arpa) DNS-A (9.1.9.1.e164.arpa) ENUM proxy.com INVITE Answer = sip:niel@proxy.com “(919) 850-5500" Query 0.0.5.5.0.5.8.9.1.9.1.e164.arpa Authority = DNS-B Query 0.0.5.5.0.5.8.9.1.9.1.e164.arpa

17. VoIP Hype VoIP Technology Trigger Slope of Enlightenment Trough of Disillusionment Plateau of Productivity Peak of Inflated Expectations Hype Maturity Type A Adoption Type B Adoption Type C Adoption