Sidevõrgud IRT 4060/ IRT 0020 vooruloeng 10 / 17. nov 2004 Võrgusõlmed

1

SidevõrgudIRT 4060/ IRT 0020

vooruloeng 10 / 17. nov 2004Võrgusõlmed

Avo Otstelekommunikatsiooni õppetool,

TTÜ raadio- ja sidetehnika inst.avo.ots@ttu.ee

2

Capacity Units

1995 2000 2005 2010

•Gflops•Gbytes

•Tflops•Pbytes

•Pflops•Ebytes

10e06

10e09

10e15

10e12

MbpsBackbone

GbpsBackbone

TbpsBackbone

10% BsBW

e2e Tbpsthroughput

e2e Gbpsthroughput

e2e kbpsthroughput

10%BsBW

10% BsBW

Terascale Computing

Gigascale Computing

Petascale Computing

Arvuti- ja kommunikatsioonijõudlus

3

Infoülekanne

Võrgurakendused

Vajalik ribalaius

Võimalik ribalaius

KiudTihendatud kiud

DWDM

Switch, Router

128x kiu kohta100x

10x

Pudelikael

Jõudluse kasv kümnendi kestel

4

Switch

5

Telephone Network

6

Võrgukihi kommutaator

PBX Transformation

PBX

Telephony Server

8

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 riskreduced service levels

for telephony?

Contact Center

InternetUnified

Messaging

Collaboration

Applications

Remote Workers

johan@abc.seDear Johan,It’s over.

10

Cost Comparison STM 64 G_Ethernet

The costs for Ethernet are often 1/10 of the cost for equivalent ATM or SONET bandwidth

11

IP PBX Timing

0

12.5

25

50

75

100

1999

Year

Percentage

Less than 3,000 systems in 2004

2000 2001 2002 2003 2004 2005 2006

Approximately 308,000

systems in 2004

IP/PBX for lessthan 100 desktops

IP/PBX for more than 100 desktops

12

What Is VoIP?

VoIP = Voice over the Internet Protocol

It is not:Voice over the Internet

Efficiency & quality

Packet Packet size size Codec Codec

Efficiency Efficiency of transport of transport Voice quality Voice quality

Dejittering Dejittering delay delay

Echo Echo control control

Header Header compression compression

14

User - A User - B

LoopTrunkGroup

CentralOffice - A

CentralOffice - B

Signal System 7Data link

Signal TransferPoint

TransitOfficeSwitching System

Connection ThroughSwitching Fabric

Switching System

15

Header

PacketPayload

Input Buffer

Output Buffer

Hdr. Trans

Hdr. Trans

RoutingFabric

16

DNS-B(0.5.8.9.1.9.1.e164.arpa)

DNS-A(9.1.9.1.e164.arpa)

ENUM

proxy.comINVITE

INVITE

Answer = sip:n

iel@pro

xy.com

“(919) 850-5500"

Qu

ery

0.0.

5.5.

0.5.

8.9.

1.9.

1.e1

64.a

rpa

Au

tho

rity

= D

NS

-B

Query 0.0.5.5.0.5.8.9.1.9.1.e164.arp

a

VoIP Hype

VoIP

TechnologyTrigger

Slope ofEnlightenment

Trough of Disillusionment

Plateau ofProductivity

Peak of InflatedExpectations

Hype

Maturity

Type A Adoption

Type B Adoption

Type C Adoption