Installation guide

ManualsBrandsSierra Wireless ManualsNetwork RouterAIRCARD 580

Rev 2 Mar.11 35

Appendix A: Glossary

1X OneTimesRadioTransmissionTechnology(theʺonetimesʺ

referstothefrequencyspectrum).SupportsInternetconnec‐

tionswithdataratesupto153.6kbps(downlinkfromthe

network)and76.8kbps(uplinktothenetwork).Actualspeed

dependsonthenetworkconditions. Compareto1x‐EVDO.

1x-EVDO Ahigh‐speedstandard

forcellularpacketdatacommunica‐

tions.SupportsInternetconnectionswithdataratesupto2.4

Mbps(downlinkfromthenetwork)and153.6kbps(uplinkto

thenetwork).Averagedataratesareroughly700kbps

(downlinkfromthenetwork)and153.6kbps(uplinktothe

network).Actualspeeddependsonthe

networkconditions.

Compareto1X.

bps bitspersecond—Theactualdataspeedoverthetransmission

medium.

CDMA CodeDivisionMultipleAccess—Awidebandspread

spectrumtechniqueusedindigitalcellular,personalcommu‐

nicationsservices,andotherwirelessnetworks.Wide

channels(1.25 MHz)areobtainedthroughspreadspectrum

transmissions,thusallowingmanyactive

userstosharethe

samechannel.Eachuserisassignedauniquedigitalcode,

whichdifferentiatestheindividualconversationsonthesame

channel.

CDMA 1X Alsoknownas1X, thisisahigh‐speedstandardforCDMA 

cellularcommunications.

circuit switched cellular V.x x modemcommunicationsoveracellularnetwork. Ituses

adedicatedconnectioncircuit,

incontrasttopacket‐switched.

Theuserischargedbythecarrierforthedurationofthe

connection.

dormant ThepacketdataconnectionhasthelogicalPPPsessionleft

openwhiletheunderlyingphysicallink(theradiochannel)is

released.Whentrafficistoresume,aradiochannelisre‐

aquiredand

theoriginalPPPsessionresumes.

ESN ElectronicSerialNumber—Theuniqueserialnumber

assignedtothemodemforcellularnetworkuse.

FCC FederalCommunicationsCommission—TheU.S.federal

agencythatisresponsibleforinterstateand foreigncommuni‐

cations.TheFCCregulatescommercialandprivateradio

spectrummanagement,setsratesforcommunicationsservices,

determines

standardsforequipment,andcontrolsbroadcast

licensing.Consult