Coaxial Twisted pair Fiber optic 1 2 Coaxial Cable 3 Coaxial Cable Types Bus RG8 RG58 Application Thick Ethernet 500 meters 10Base5 Thin Ethernet 185 meters 10Base2 ID: 495160
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Physical media
CoaxialTwisted pairFiber optic
1Slide2
2
Coaxial Cable Slide3
3
Coaxial Cable Types - Bus
RG-8
RG-58
Application
Thick Ethernet
(500 meters)
10Base-5
Thin Ethernet
(185 meters)
10Base-2
Thickness
0.405 inch
0.195 inch
Connector Type
N
BNC with a T-fittingSlide4
Other
Plenum – space between floorsPlenum type cable – demanded by the National Fire Protection Association that cables run within the plenum have been tested and guaranteed as save, that is, thye must be
Fire retardant and create little or no smoke and poisonous gas when burned
RG-59 for TV, RG-6 for TV and cable modems
RG-62 for ARCnet - obsolete
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Twisted-Pair Cable Slide6
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UTP Cable Grades
EIA/TIA Grade
Applications
Cat2
For voice, obsolete
Category 3 (16 MHz)
Voice-grade telephone networks, 10-Mbps Ethernet, 4-Mbps Token Ring, 100Base-T4 Fast Ethernet, and 100Base-VG-AnyLAN
Category 4 (20 MHz)
16-Mbps Token Ring
Category 5
100Base-TX Fast Ethernet, Synchronous Optical Network (SONET), and Optical Carrier (OC3) Asynchronous Transfer Mode (ATM)
Category 5e and 6
1000Base-T (Gigabit Ethernet)
Category 6 (250 MHz)
Become standard in 2002, backboneSlide7
Connect s
RJ-11 for phone and DSL (Digital Subscriber Link)RJ-45 for LAN, use a crimper to connect the wires to the connect first
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Fiber Optic CableSlide9
The Cores
Can be glass for greater distance, or Plastic to reduce cost
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Single Mode vs. Multimode Fiber
Single mode, single-mode optical fiber (SMF) is an optical fiber designed to carry only a single ray of light (mode)
Multimode fiber optic cable has a large
diametral
core that allows multiple modes of light to propagate
http://en.wikipedia.org/wiki/Multi-mode_optical_fiber
http://www.multicominc.com/active/manufacturer/multicom/Fiber%20Optics/singlemode-multimode.html
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Multimode Fiber
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Fiber Optic Cable Types
Singlemode
(SMF):
Used for wide area networks (WANs) and other long cable runs, glass core, light source is transmitted from end to end and pulsed to communicate, can go up to 40 km
Multimode (MMF):
Used for local area networks (LANs) and short cable runs, light is reflected by cladding, core can be either glass or plastic, 1/50 the speed of SMF, 3000 ft distanceSlide13
Pros and Cons of fiber
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Fiber Optic Connectors (SC, ST)Slide15
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Fiber Optic Connectors – ST and SC
See page 64 (N10 – 00 5 edition) for examples of ST and SC connectors
Fiber cables always need a pair – one for each direction (sending and receiving)
Figure 3.8 a MT-RJSlide16
Serial Cables
RS-232USB (Universal Serial Bus) can connect up to 127 devices
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Properties of cables
Transmission speed – unit MbpsDistance UTP – 100 metersAttenuation – the degradation of signal due to medium “burns” energy
Duplex
Noise Immunity
Frequency
Cat 5e can go 1Gbps for short distance
Cat 6, build for 1Gbps
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Wiring Standards
568A straight –through cable568B Crossover cableRolled cable
Hardware loopback
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568A straight –through cable
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568B Crossover cable
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Rollover – mostly CISCO
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Loopback
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Wiring Distributions
Vertical Between floorsHorizontal
Within the same floor
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Patch Panels -- inactive
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Demarc
Demarcation – last point of responsibility
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