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Chapter 4: Connections
Telephones
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Telephone Network
Cellular Grid
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Cellular Connections
Faxes
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Faxes• Bit map used to represent a picture• Typical resolution of 200 dpi• Typical sheet requires about 3740000 dots (pixels)• It would about two minutes to send one sheet at 33.6 kbps
Transmission Modes
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Asynchronous Transmission
Asynchronous Transmission
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Synchronous Transmission
Communication Directions
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Interface Standards
EIA/RS232 Standard
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RS232 Standard Signaling
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Null Modem
Balanced vs. Unbalanced Signal
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X.21 Interface
X.21 Interface Signaling
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USB Connections
USB Wires
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USB Plugs
FireWire-IEEE 1394 Standard
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Data Strobe Encoding
Multiple FireWire Buses
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Multiplexing
Multiplexing Low Speed Devices
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Amplitude Modultion
Modulation Principles
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Frequency Division Multiplexing
Time Division Multiplexing
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Statistical Time Division Multiplexing
Wave Division Multiplexing
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Wave Division Multiplexing
T1 Digital Carrier DS1 Frame
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T1 Digital Carrier
Other Carriers
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Contention Protocols
No Protocol …
Contention Protocols
Protocol Present …
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Aloha Protocols
Pure Aloha vs. Slotted Aloha
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Pure Aloha vs. Slotted Aloha
CSMA and Aloha Protocols
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Collision Detection
Token Ring Network
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Summary of Contention Protocols