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Explore the advancements in computer networks and communication technology from the past to the future, covering topics such as throughput capacities, computing units, backbone speeds, network applications, VoIP technologies, and network reliability. Learn about the trends shaping the industry over the years.
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SidevõrgudIRT 4060/ IRT 0020 vooruloeng 10 / 17. nov 2004Võrgusõlmed Avo Otstelekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst.avo.ots@ttu.ee
10% BsBW 10% BsBW 10%BsBW e2e Tbps throughput e2e Gbps throughput e2e kbps throughput Arvuti- ja kommunikatsioonijõudlus Petascale Computing Capacity Units 10e15 • Pflops • Ebytes Terascale Computing 10e12 • Tflops • Pbytes Gigascale Computing Tbps Backbone • Gflops • Gbytes 10e09 Gbps Backbone 10e06 Mbps Backbone 1995 2000 2005 2010
Võrgurakendused Vajalik ribalaius Pudelikael Switch, Router 10x Võimalik ribalaius Kiud Tihendatud kiud DWDM 100x 128x kiu kohta Infoülekanne Jõudluse kasv kümnendi kestel
PBX Transformation Telephony Server PBX
Reliability Is NT as stable as a proprietary operating system? WAN Why shouldn’t the data network be resilient enough for voice needs? Will management risk reduced service levels for telephony?
johan@abc.se Dear Johan, It’s over. Applications Contact Center Unified Messaging Internet Remote Workers Collaboration
Cost Comparison STM 64 G_Ethernet The costs for Ethernet are often 1/10 of the cost for equivalent ATM or SONET bandwidth
IP PBX Timing Percentage IP/PBX for less than 100 desktops 100 Approximately 308,000 systems in 2004 75 IP/PBX for more than 100 desktops 50 25 12.5 Less than 3,000 systems in 2004 0 1999 2000 2001 2002 2003 2004 2005 2006 Year
What Is VoIP? VoIP = Voice over the Internet Protocol It is not:Voice over the Internet
Echo control Dejittering delay Packet size Header compression Codec Efficiency of transport Voice quality Efficiency & quality
Signal Transfer Point Signal System 7 Data link Trunk Group Loop User - A User - B Central Office - A Transit Office Central Office - B Switching System Connection ThroughSwitching Fabric Switching System
Packet Payload Input Buffer Routing Fabric Header Output Buffer Hdr. Trans Hdr. Trans
ENUM DNS-A (9.1.9.1.e164.arpa) DNS-B (0.5.8.9.1.9.1.e164.arpa) Query 0.0.5.5.0.5.8.9.1.9.1.e164.arpa Query 0.0.5.5.0.5.8.9.1.9.1.e164.arpa Authority = DNS-B Answer = sip:niel@proxy.com proxy.com INVITE INVITE “(919) 850-5500"
VoIP Hype Peak of InflatedExpectations Plateau of Productivity Hype VoIP Slope of Enlightenment Technology Trigger Trough of Disillusionment Type A Adoption Type B Adoption Type C Adoption Maturity