CIT 307 Online Data Communications Transmission Media Module 7 Kevin Siminski, Instructor.

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Presentation transcript:

CIT 307 Online Data Communications Transmission Media Module 7 Kevin Siminski, Instructor

Transmission Media and Layer 1

Classes of Media

Guided Media types Twisted Pair Cable Coaxial Cable Fiber-Optic Cable

Twisted Pair Why the twist??

Twisted Pair (continued) UTP and STP

Categories of UTP CategoryBandwidthData RateDigital/AnalogUse 1very low< 100 kbpsAnalogTelephone 2 < 2 MHz2 MbpsAnalog/digitalT-1 lines 3 16 MHz 10 MbpsDigitalLANs 4 20 MHz 20 MbpsDigitalLANs MHz 100 MbpsDigitalLANs 6 (draft) 200 MHz 200 MbpsDigitalLANs 7 (draft) 600 MHz 600 MbpsDigitalLANs

UTP Connectors

UTP Performance

Coaxial Cable

Types of Coaxial Cable CategoryImpedanceUse RG  Cable TV RG  Thin Ethernet RG  Thick Ethernet

Coaxial Connectors

Coaxial Performance

Fiber Optic Cables Use either LED (Light Emitting Diode) or Laser transmitter Can be expensive to terminate cables. Time consuming Delicate

Fiber Optics

Fiber Optic types/modes

Modes of operation

Fiber types TypeCoreCladdingMode 50/ Multimode, graded-index 62.5/ Multimode, graded-index 100/ Multimode, graded-index 7/ Single-mode

Fiber Construction

Fiber Optic connectors

Fiber Optic Performance

Other Fiber Optic tid-bits Single Mode Fiber 99% of the time uses a laser for transmission. – Cable color is usually Yellow Multimode Fiber uses a LED for transmission – Cable color is usually Orange