Communications Processors

Network Topology

Telecommunications & The Internet Basic Telecom Model

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Bog'liq
Network-Internet

Transmission Speed

BPS, bits-per-second, the amount of information that can be transmitted through a channel
BAUD - a binary event, a signal change from positive to negative or vice versa.

Speed II

At higher speeds a single signal change can transmit more than one bit at a time, so the bit rate will generally be higher that the baud rate.
Transmission capacity is a function of the frequency, higher frequency means higher capacity

More Speed

Bandwidth = range of frequencies that a channel can support (difference between highest and lowest frequency).
Greater range means greater bandwidth.
Greater bandwidth means greater transmission capacity.

Faster Yet

Bandwidth is like pipe diameter.
Larger diameter pipes can transmit more water in a given period of time.
Personal Communication Services, PCSs, have a greater bandwidth than fiber optics.

Communications Processors

Front End
Processor

CPU

Controller

Computer

C
h
a
n
n
e
l

Multiplexer

PC

PC

PC

T

T

T

T

Concentrator

Channel

Network Topology

Star Network
Bus Network
Ring Network

C

C

C

C

C

C

C

C

C

C

C

C

P

P

P

Networks

Local Area Network, LAN
Wide Area Network, WAN
Value Added Network, VAN

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Telecommunications & The Internet Basic Telecom Model

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