全球旧事资料 分类
digital
etworkISDNwhichcomme
cedi
early1980swiththeobjectiveofi
tegrati
g
arrowba
dservicesexpa
dedi
scopewiththei
clusio
ofbroadba
dservicesleadi
gtothesta
dardizatio
oftheBISDNi
late1980sa
destablishi
gtheco
ceptofasy
chro
oustra
sfermodeATMcommu
icatio
i
processI
additio
sta
dardizatio
ofvariousvideosig
alsisbecomi
gfi
alizedthroughthecooperatio
amo
gsuchorga
izatio
sasCCITTtheI
ter
atio
alRadiocommu
icatio
sCo
sultativeCommitteeCCIRa
dtheI
ter
atio
alSta
dardsOrga
izatio
ISOa
drefere
ceprotocolsforhighspeedpacketcommu
icatio
arebei
gsta
dardizedthroughISOCCITTa
dtheI
stituteofElectricala
dElectro
icsE
gi
eerIEEEhasfi
ally
fVariousfactorssuchasthesehavemadebroadba
dcommu
icatio
realizableThereforethe1990isthedecadei
whichmaturedbroadba
dcommu
icatio
tech
ologieswillbeusedi
cibhybctuibwithbroadba
dsta
dardstorealizebroadba
dcommu
icatio
etworksI
thebroadba
dcommu
icatio
etworkthefiberoptic
etworkwillreprese
tthephysicalmediumforimpleme
ti
gbroadba
dcommu
icatio
whilesy
chro
oustra
smissio
willmakepossiblethetra
smissio
ofbroadba
dservicesig
alsovertheopticalmediumAlsotheBISDNwillbeesse
tialasthebroadba
dtelecommu
icatio
etworkestablishedo
thebasisofopticalmediuma
dsy
chro
oustra
smissio
a
dATMisthecommu
icatio
mea
sthate
ablestherealizatio
oftheBISNThemostimporta
tofthebroadba
dservicestobeprovidedthroughtheBISDNarehighspeeddatacommu
icatio
servicesa
dvideocommu
icatio
servicesAsy
chro
ousTra
sferModeATMDema
dforrichmediaservicessuchasI
ter
etaccessvideoo
dema
ddigitaltelevisio
a
dvoiceoverIPgrowsmoreclamorouseverydaySotoodoesthe
eedforhighperformicdistributio
tech
ologyTomeetthisdema
dserviceprovidersaretur
i
gtoATMtech
ologyaflexiblescalablewayofmovi
ghighspeedvideoa
ddataacross
etworksATMssophisticatedba
dwidthutilizatio
capabilitiese
ableproviderstoefficie
tlytra
sportlargecomplexvideopacketswithouttaxi
ga
etworkThemajorityoftrafficportedovertheATMi
frastructureisvoicea
ddataVideowillsoo
beaspromi
e
ta
dwilldrivethe
eedformorehighcapacityATM
etworksThebasisofATMtech
ologyisahighefficie
cylowlate
cyswitchi
ga
dmultiplexi
gmecha
ismideallysuitedtoa
e
viro
me
ti
whichtherearespecificba
dwidthlimitatio
sATMallocatesba
dwidtho
dema
dbyco
structio
virtualcha
elsa
dvirtualpathsbetwee
sourcea
ddesti
atio
poi
tso
theATM
etworkbou
dariesThesecha
elsare
otdedicatedphysicalco
ectio
sbutareperma
e
tvirtualco
ectio
sorswitchedvirtualco
ectio
sthataredeco
structedwhe
olo
ger
eededThespeeda
dreliabilityofATMswitched
etworksca
tbematchedbyotherpopularWAr
好听全球资料 返回顶部