Sierra Wireless PinPoint X Guia do Utilizador descarregar pdf (Página 12)

Introduction to the PinPoint X

Rev 4.0 Oct.09 6

IfyouneedtocontactyourPinPointX,adeviceconnectedto

thePinPoint X,orahostsystemusingthePinPointXfromthe

Internet,youneedtohaveaknownIP(suchasonewhichis

static)ordomainname(anIPaddresswhichisconvertedbya

DNS

serverintoawordbasedname).IfyouhaveadynamicIP

addressforyourmodem,youcanuseaDynamicDNSservice

(suchasIPManager)totranslateyourIPaddressintotoa

domainname.

Caution:

If you want to connect remotely to your PinPoint X using

TCP/IP, the IP address given to your modem by your cellular provider

cannot be a private or internal IP address (such as a special private

network) unless you are on the same network or inside that network’s

firewall (such as with frame relay).

Communication HSUPA

ManyoftheGSMNetworkshavebeenexpandedtoHSUPA.

HSUPA

HSUPA(High‐SpeedUplinkPacketAccess)isacellular

technologywhichmostcloselyresemblesabroadband

synchronousconnection.Theuploadanddownloadspeeds

aremaximizedtoprovideafasterthroughput,reachingspeeds

upto2.0Mbit/sfortheuplinkand7.2Mbit/sforthedownlink.

Pleasecheckwithyournetworkproviderontheavailabilityof

HSUPA.

HSDPA

HSDPA(High‐SpeedDownlinkPacketAccess)isacellular

technologyallowingforhigherdatatransferspeeds.In

HSDPAmodeofoperation,maxspeedsareupto7.2Mbit/sin

thedownlinkand384kbit/sintheuplink.HSDPAuses

AdaptiveModulationandCoding(AMC),fastpacketsched

‐

ulingattheNodeB(BaseStation)andfastretransmissions

fromNodeB(knownasHARQ‐HybridAutomaticRepeat

Request)todelivertheimproveddownlinkperformancevs.

UMTSandEDGE.

HSPDA(andHSUPA)fallsbacktoUMTS,EDGEorGPRS (in

orderofprecedence).Thisfeatureallowsyoutohaveseamless

connectivitynomatterwhereyourPinPointXis.

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