Document 2130972. Rev 1.0 Apr.08 57
A
Appendix A: Glossary
1X OneTimesRadioTransmissionTechnology(theʺonetimesʺ
referstothefrequencyspectrum).SupportsInternet
connectionswithdataratesupto153 Kbps.Actualspeed
dependsonthenetworkconditions.Compareto1x‐EVDO.
1x-EVDO Ahigh‐speedstandardforcellularpacketdatacommunica‐
tions.
Rev.AsupportsInternetconnectionswith
dataratesupto
3.1 Mbps(downlinkfromthenetwork)and1.8 Mbps(uplink
tothenetwork).
Rev.0supportsInternetconnectionswithdataratesupto
2.4 Mbps(downlinkfromthenetwork)and153 Kbps(uplink
tothenetwork).
Averagedataratesare:forRev.A:450–800 Kbps(downlink
fromthenetwork)and
300–400 Kbps(uplinktothenetwork);
forRev.0:400‐700 Kbps(downlinkfromthenetwork)and
40‐80 Kbps(uplinktothenetwork).
Actualspeeddependsonthenetworkconditions.Compareto
1X.
bps bitspersecond—Theactualdataspeedoverthetransmission
medium.
CDMA CodeDivisionMultipleAccess—Awidebandspreadspectrum
techniqueusedin
digitalcellular,personalcommunications
services,andotherwirelessnetworks.Widechannels
(1.25 MHz)areobtainedthroughspreadspectrumtransmis‐
sions,thusallowingmanyactiveuserstosharethesame
channel.Eachuserisassignedauniquedigitalcode,which
differentiatestheindividualconversationsonthe same
channel.
CDMA 1X Alsoknownas
1X,thisisa high ‐speedstandardforCDMA
cellularcommunications.
dormant ThepacketdataconnectionhasthelogicalPPPsessionleft
openwhiletheunderlyingphysicallink(theradiochannel)is
released.Whentrafficistoresume,aradiochannelis
re‐acquiredandtheoriginalPPPsessionresumes.
ESN Electronic
SerialNumber—Theuniquefirst‐generationserial
numberassignedtothemodemforcellularnetworkuse.
ComparetoMEID.
ExpressCard™ Add‐inmemoryandcommunicationscardsforportable
computers.ExpressCardisatrademarkofthePCMCIA.
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