User guide

Introduction to the Raven XE
Rev 2.0 Oct.09 6
Communication
GSMNetworksuseSIMcardswhicharesmartcards
containingtheaccountholder’sdetails.ASIMcangenerallybe
movedfromonedevicetoanotherallowingforaccountporta
‐
bilityandflexibility.
EDGE
EDGE(EnhancedDataratesforGSMEvolution)providesend‐
to‐endpacketdataserviceswithanenhancedconnectivity
buildingonGPRStechnologyandusingtheestablishedGSM
networks.EDGEprovideshighertransmissionratesandbetter
transmissionqualityfordatathanGPRS.EDGEcancarrydata
atspeedstypicallyupto 384
kbit/sinpacketmode.
WhenEDGEisnotavailable,yourRavenXEwillfall‐backto
GPRSfortheconnectiontoAT&Ttoprovidecontinued
connectivity.
GPRS
GeneralPacketRadioService(GPRS)ispacket‐switchedwith
manyuserssharingthesametransmissionchannel,butonly
transmittingwhentheyhavedatatosend.Thismeansthatthe
totalavailablebandwidthcanbeimmediatelydedicatedto
thoseuserswhoareactuallysendingatanygivenmoment,
providinghigherutilizationwhere
usersonlysendorreceive
dataintermittently.GPRSprovidesspeedsof30–70kbpswith
burstsupto170 kbps.
Connection methods
YoucanconnecttheRavenXEtoaUSBoraEthernet(RJ45)on
acomputer.WhenconnectedtoaUSBorEthernetport,the
RavenXEbehaveslikeanetworkcard.
USB
TheRavenXEisequippedwithaUSBportwhichincreasesthe
methodsbywhichyoucansendandreceivedata.TheUSB
portcanbesettoworkaseitheravirtualEthernetportora
virtualserialport.Adriverinstallationisrequiredtousethe
USBportin
eithermode.