Industrial Communication Systems

14-1

14.1 Introduction

e advent of personal computers (PCs) and the Web have provided distributed mechanisms for infor-

mation

sharing

while

telephones

serve

almost

exclusively

as

communication

devices

[1,2].

Currently,

enterprises

uti

lize

a het

erogeneous

mix

ture

of

•

Voice Networks—Voice

telephony

networks

are

used

to

perform

daily

telecommunications

activ-

ities

mos

tly

ove

r

the pub

lic

swi

tched

tel

ephone

net

work

and glo

bal

sys

tem

for mob

ile

net

works.

•

Data Networks—Internet

protocol

(IP)

wired

and

wireless

networks

provide

a

data

communica-

tion

med

ium

for acc

ess

to Int

ernet

and int

ranet

dat

a

ser

vices

and app

lications.

•

Enterprise Applications ...