Matakuliah
Tahun
Versi
: M0284/Teknologi & Infrastruktur E-Business
: 2005
: <<versi/revisi>>
Pertemuan 5
Networking Fundamentals
1
Learning Objectives
• Understand packet switching networks
• Appreciate different types of wireless
telephony
2
Overview
• Packet Switching Networks
• Wireless Telephony
3
SONET System
• Optical carrier levels for Fiber Optic
transmission
– OC-1 52 mbps
– OC-3 155 mbps
– OC-9 466 mbps
– OC-12 622 mbps
– OC-48 2,500 mps (2.5 Gbps)
– OC-192 10,000 mbps (10 Gbps)
4
Wireless Technologies
• Wide area communication Uses media
from a telephone company Cellular systems,
Satellite systems, Pagers
• Local area communication Network within
ones property Wireless LANs
• Personal area network
Less than 10 meter
5
Wireless Wide Area
• Analog cellular system
advanced mobile phone
system Cells, Mobile telephone switching office
(MTSO), Public switched telephone network (PSTN)
6
Wireless Wide Area
• Digital Cellular System
Modulation is used to
transmit voice as a digital signal. TDM is used to
multiplex several conversation over a single channel.
Permits more lines than AMPS
• Personal Communication Service Similar to
digital cellular system. Uses different frequency
spectrum
7
Wireless Wide Area
• Nextel One transmitter covering a large area. 2-way
dispatch service. Used by Taxis and public safety people
• Paging
One directional, point-to-point, character/
numerical based
• I-Mode. Packet based. Offered by NTT DoCoMo in
Japan. Sound, color and video over hand held devices
8
Wireless Personal Area Network
• Bluetooth
• Connect home and office based systems
in a network
• Connect PCs, printers, telephones,
stereos, TVs
• Packet switching technology
9
Modems
• Modems allow signals from a PC to travel from
home to the telephone company’s central office
or the cable company
• PC Modem using telephone line
• Cable Modem using coaxial cable connection
from cable company
• DSL Modem uses digital subscriber line
10
Modems PC modem
11
Modems Cable Modems
12
Modems DSL
13