ZTE ZXMBW E9230 Users Manual

ZXMBWE9230

CompactBaseStation(outdoor)

UserManual

ZTECORPORATION
ZTEPlaza,KejiRoadSouth,
Hi-TechIndustrialPark,
NanshanDistrict,Shenzhen,
P .R.China
518057
Tel:[phone]
Fax:[phone]
URL:http://ensupport.zte.com.cn
E-mail:[e-mail]

LEGALINFORMATION

Copyright©2006ZTECORPORATION.

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TheultimaterighttointerpretthisproductresidesinZTECORPORATION.

RevisionHistory

RevisionNo.RevisionDateRevisionReason

R1.1

R1.0

07/15/2009OptimizeManaul

05/15/2009FirstEdition

SerialNumber:sjzl20092846

Contents

Preface...............................................................i

ProductOverview..............................................1

ZXMBWE9230PositionintheNetwork..............................1

Functions......................................................................2

Appearance...................................................................3

FundamentalPrinciple.....................................................3

ExternalInterfaces.........................................................4

NetworkingApplication....................................................6

TechnicalIndices............................................................7

EngineeringIndices....................................................7

PerformanceIndices...................................................8

ClockParameter.........................................................9

EnvironmentalIndices.................................................9

ComplianceStandards....................................................10

ProtocolInterfaceDescription..........................................10

ASNNetworkReferenceModel.....................................10

ProtocolInterfaces.....................................................11

R1Interface.............................................................12

R6Interface.............................................................14

HardwareDescription......................................19

CabinetStructure..........................................................19

HardwareModules.........................................................21

MTRWModule...............................................................21

WDPAModule...............................................................21

WRFEModule................................................................22

WRPMModule...............................................................23

EquipmentInstallation....................................25

ComponentstobeInstalled...........................................25

InstallationFlow............................................................25

InstallationPrecautions..................................................26

InstallationPreparation..................................................27

InstallationEnvironmentCheck...................................27

InstallationPositionRequirements...............................27

TemperatureandHumidityRequirements......................28

PowerSupplyRequirements........................................28

OtherPreparation......................................................28

ToolsandInstrumentsPreparation...............................29

InstallingCabinets.........................................................30

InstallationModeIntroduction.....................................30

InstallingaWall-MountCabinet...................................34

InstallingaPole-MountCabinet...................................39

InstallingExternalCables...............................................47

InstallingPowerCable................................................47

InstallingGroundingCable..........................................49

InstallingRFJumper..................................................50

InstallingAntenna.....................................................51

InstallingFeederGroundingKit...................................54

PerformingOutdoor-connectorWaterproof

Processing........................................................55

VSWRTest................................................................60

CabinetInstallationCheck..............................................60

CabinetInstallationCheck..........................................60

On-siteEnvironmentInspectionItems..........................61

Power-on......................................................................61

Figures............................................................63

Tables.............................................................65

Preface

PrerequisiteSkill

andKnowledge

WhatisinThis

Purpose

ZXMBWE9230isanoutdoorcompactbasestationandoneof
WiMAXbroadbandradioaccessproducts.ItprovidesIP-based
voiceandvideoservicesinhotspots,blindspots,ruralandsub­urbs,railwaysandhighways.

Thismanualdescribessystemcompositions,functions,principle,
networking,technicalindicesandengineeringinstallationofthe
ZXMBWE9230.

Intended
Audience

Thisdocumentisintendedforengineersandtechnicianswhoper­formoperationandinstallationactivitiesontheZXMBWE9230.

Tousethisdocumenteffectively ,usersshouldhaveageneralun­derstandingofwirelesstelecommunicationstechnology.Familiar­itywiththefollowingishelpful:

�TheZXMBWE9230systemanditsvariouscomponents

�UserinterfacesontheZXMBWE9230

�Localoperatingprocedure

Thismanualcontainsthefollowingchapters.

Manual

Chapter

Chapter1ProductOverview

Summary

Introducestheposition,functions,
principles,externalandinternal
interfaces,applicationsand
technicalindicesoftheZXMBW
E9230.

Chapter2HardwareDescriptionDescribesthecabinetstructure,

Chapter3EquipmentInstallationDescribestheinstallation

FCCCompliance

Statement

Thisdevicecomplieswithpart15oftheFCCRules.Operationis
subjecttothefollowingtwoconditions.

hardwaremodules,antenna
feedersystemandexternalcables
oftheZXMBWE9230.

ow,installationpreparation,
cabinetinstallation,power
cableinstallation,hardware
installationcheck,andpower-on
andpower-offproceduresofthe
ZXMBWE9230.

1.Thisdevicemaynotcauseharmfulinterference.

2.Thisdevicemustacceptanyinterferencereceived,including
interferencethatmaycauseundesiredoperation.

Changesormodicationsnotexpresslyapprovedbythepartyre­sponsibleforcompliancecouldvoidtheuser'sauthoritytooperate
theequipment.

CondentialandProprietaryInformationofZTECORPORATIONi

ZXMBWE9230UserManual

Thispageisintentionallyblank.

iiCondentialandProprietaryInformationofZTECORPORATION

Chapter1

ProductOverview

TableofContents

ZXMBWE9230PositionintheNetwork..................................1

Functions..........................................................................2

Appearance.......................................................................3

FundamentalPrinciple.........................................................3

ExternalInterfaces.............................................................4

NetworkingApplication........................................................6

TechnicalIndices................................................................7

ComplianceStandards........................................................10

ProtocolInterfaceDescription.............................................10

ZXMBWE9230Positionin theNetwork

ZXMBWE9230islocatedintheradioaccesslayerofWiMAXnet­worksandusedtoprovidebroadbandradioaccessforusersin
outdoorhotandblindspots,suburbs,ruralareas,railwaysand
highways.

Figure1showsthepositionoftheZXMBWE9230intheWiMAX

network.

FIGURE1ZXMBWE9230POSITIONINTHENETWORK

Table1describesthemeaningsoftheseNEs.

CondentialandProprietaryInformationofZTECORPORATION1

ZXMBWE9230UserManual

ForwardSignal

Processing

ReverseSignal

Processing

ClockProcessing

OtherFunctions

TABLE1NEMEANING

NEMeaning

AAAAuthentication,Authorization,Accounting

AGWAccessServiceNetworkGateway

E9230CompactBaseStation(outdoor)

CPECustomerPremisesEquipment

DHCPserverDynamicHostCongurationProtocolserver

OMAOperation,MaintenanceandAdministration

Functions

TheZXMBWE9230providesthefollowingfunctions.

�PerformsOFDMAmodulation,MAClayerprocessing,digi-

talup-conversion,intermediatefrequencyamplication,RF
poweramplicationandtransmitlteringonreceivedbase­bandsignalsandthentransmitsthembyusingtheantenna.

�ImplementsMAClayerschedulingandpowercontrol.

�Detectsbasebandsignalpowerandantennainterfacepowerin

FPGAofthedigitaldomain.

�Accomplisheswavestandingratiodetectionontheforwardan-

tennainterface.

�Implementsforwardautomaticcalibrationandmanualcalibra-

tion.

�ReceivesreverseRFWiMAXsignalsfromspaceandperforms

bandpassltering,lownoiseamplication,RFRFmixingand
digitaldown-conversiononthesesignalsandthensendsthem
tothebasebandOFDMAmodulationandMAClayerprocessing.
Afterwards,thebasebandsendsthesesignalstoAGWthrough
theR6interfaceforinterconnectionwiththecorenetwork.

�SupportsreverseRSSIandreversespectrumscanfunctions.

�Accomplishesreverseautomaticgaincontrol.

�ImplementsGPSclocksignalabstractionandclockrecovery .

�Supportsclockcascading.

�Accomplishesclocksignaldistribution.

�MonitorsandmanagesWDPAsignals.

�Monitorsandmanagesthepowersupply.

�Monitorsandmanagestheelectricallytunedantenna.

�MonitorsexternalequipmentsthroughdrycontactsandRS485

interface.

�ImplementsTDDtimesequenceregeneration.

�Accomplishesversionmonitoringandversionmanagement.

2CondentialandProprietaryInformationofZTECORPORATION

Chapter1ProductOverview

�Implementsmaster/slaveR6interfaceprocessingandR6in-

terfaceEthernetconvergence.

Appearance

ThedimensionsoftheZXMBWE9230cabinetare370mm(W)×
320mm(D)×165mm(H).Figure2showstheZXMBWE9230ap-
pearance.

FIGURE2ZXMBWE9230APPEARANCE

FundamentalPrinciple

TheZXMBWE9230implementstheradioaccessfunctionforout­doorcoveragesystems.

Itprovidesthefollowingfunctions:

CondentialandProprietaryInformationofZTECORPORATION3

ZXMBWE9230UserManual

�ExchangesradiosignalswiththeATsinitscoveragethrough

theWiMAXairinterfaceandcontrolsradiochannels.

�CommunicateswithBTSs.

�Modulatesanddemodulatesbasebandsignals.

�Implementssystemclocksynchronization.

�ReceivesandtransmitsRFsignals.

�Implementspowercontrol.

TheZXMBWE9230iscomposedofabasebandintermediatefre­quencyboard(MTRW),adigitalpredistortionhighpoweramplier
(WDPA),anRFfrontendlter(WRFE)andpowermoduleWRPM.

Figure3illustratestheZXMBWE9230composition.

FIGURE3ZXMBWE9230COMPOSITION

TheZXMBWE9230processesthefollowingbasicservices:

�Forwardservice

ThecorenetworksendsIPpacketstotheZXMBWE9230
throughthetransmissionnetwork.Afterreceivingthesepack­ets,theMTRXunitoftheZXMBWE9230disassemblesthem
andthensendstothebasebandprocessunitforencodingand
modulation.Afterwards,theseIPpacketsaresenttotheRF
processunitforup-conversionandpoweramplicationbefore
beingtransmittedtoA T s.

�Reverseservice

ThesignalsfromAT saredownconvertedbytheRFprocessunit
oftheZXMBWE9230andthensenttothebasebandprocess
unitforchannelmodulation.Afterwards,thesesignalsaresent
totheCPUcontrolunitforIPpackingandthentransmittedto
thecorenetworkthroughthetransmissionnetwork.

ExternalInterfaces

Figure4showstheexternalinterfacesoftheZXMBWE9230.

4CondentialandProprietaryInformationofZTECORPORATION

FIGURE4EXTERNALINTERFACES

Chapter1ProductOverview

1.GigabitEthernetelectricalinter­face

2.GigabitEthernetelectricalinter­face

3.GigabitEthernetelectricalinter­face

Table2describestheseexternalinterfaces.

TABLE2EXTERNALINTERFACEDESCRIPTION

Sequence

No.

1

1,2and3GigabitEthernetelec-

4

5

6and7

Interface

Description

Electricallytunedan­tennainterface

tricalinterface

Monitoring&mainte­nancecascadeinter­face

DCpowerinterface

RFantennafeederin­terface

4.Monitoring&maintenancecascade
interface

5.Powerinterface

6.RFantennafeederinterface

7.RFantennafeederinterface

8.GPSantennainterface

9.GigabitEthernetopticalinterface

ConnectorQuan-

8–coreaerialconnec­tor

Electricalinterface
connectorassembly

37–coreaerialcon­nectorassembly

Powerconnectoras­sembly

N-female

tity

1

3

1

1

2

8GPSantennainter-

TNC-female

face

9

–TheETH0interfacewithsequenceNo.of1issharedbyR6interfaceand

electricallytunedantennainterface.Theinterfaceisusedfordifferent
purposesaccordingtothecongurationrequirement.

GigabitEthernetopti­calinterface

CondentialandProprietaryInformationofZTECORPORATION5

Opticalinterfacecon­nectorassembly

1

1

ZXMBWE9230UserManual

ZXMBWE9230

Independent

Networking

Application

Note:

TheelectricallytunedantennainterfaceandtheR6interfacethat
thestarnetworksupportsaremutuallyexclusive.Inthecaseof
electricallytunedantenna,ETH0isoccupied.Inthiscase,onlythe
R6interfacedaisycascadingissupportedwhiletheR6interface
starcascadingisnotsupported.

NetworkingApplication

TheZXMBWE9230supportsmultiplenetworkingapplications.

Figure5illustratestheZXMBWE9230independentnetworkingap-

plication.

FIGURE5INDEPENDENTNETWORKINGAPPLICATION

StarNetworking

Application

DaisyNetworking

Application

6CondentialandProprietaryInformationofZTECORPORATION

Figure6

application.

FIGURE6ZXMBWE9230STARNETWORKINGAPPLICATION

Figure7illustratestheZXMBWE9230R6interfacedaisynetwork-

ingapplication.

illustratestheZXMBWE9230R6interfacestarnetworking

FIGURE7ZXMBWE9230DAISYNETWORKINGAPPLICATION

TechnicalIndices

Chapter1ProductOverview

EngineeringIndices

Table3givesZXMBWE9230engineeringindices.

TABLE3ENGINEERINGINDICES

IndexDescription

Dimension370mm(W)×320mm(D)×165mm(H)

Weight15kg

PowerSupply-48VDC

Temperatureof
workingenviron­ment-40℃~55℃

Humidityofwork­ingenvironmentRelativehumidityrange:5%~95%

Overallpowercon­sumption<200W

Protectionlevel

IP65

Overallsize<20litres

Overallpowerof
powersupply

Heatdissipation

CondentialandProprietaryInformationofZTECORPORATION7

<200W

Self-cooling

ZXMBWE9230UserManual

PerformanceIndices

Table4liststheperformanceindicesofZXMBWE9230.

TABLE4PERFORMANCEINDICES

IndexDescription

Bandclass

RF

Duplex
mode

System
indices

ModulationmodeQPSK,16QAMand64QAM

Antenna

R6interfaceOpticalinterfaceorelectricalinterface

Overallnoise

Maintenance

Environmentalprotection

Carrier
bandwidth

FDD/TDD

Carrier1carrieror2carriers

MIMO2×2MIMO

Outputpower

2496MHz~2690MHz

5MHzand10MHz1–carriersupport
2x10MHzand2x5MHz2–carrier
support

TDD

2x40dBm(10W)

Electricallytunedantenna(optional)

Nonoise

Itsupportsremoteupgrading.
ItsupportsthelocalOMCandDebug
interface.

ItmeetstheRestrictionoftheUse
ofcertainHazardousSubstancesin
ElectricalandElectronicEquipment
(ROHS)andWasteElectricaland
ElectronicEquipmentDirective(WEEE)of
theEuropeanUnion.

Heatdissipation

Followedstandards

Lightningprotection

Installationmode

8CondentialandProprietaryInformationofZTECORPORATION

Self-cooling

IEEE802.16-2005
WiMAXForumTMMobileRadio
ConformanceT ests

DC:Abuilt–in15KAlightningarrester
meetsthelevelCrequirement.

Itsupportsoutdoorpole—mount
installationandwall-mountinstallation.

Chapter1ProductOverview

ClockParameter

TheZXMBWE9230supports3levelsofmaster/slaveclockcas­cading.

EnvironmentalIndices

Table5givestheenvironmentalindicesoftheZXMBWE9230.

TABLE5ENVIRONMENTALINDICES

IndexDescription

Workingenvironment

Biologicalenvironment(4B1)

Chemicalmaterialcondition(4C2)

Sandmg/m3

Mechanicalma­terialconditions
(4S3)

Dust(oating)

Dust(sinking)

Temperature

Relativehumidity

Temperature
changerate

Pressure

Outdoorareas(higher
than4K2)/4Z5/4Z7/4
B1/4C2/4S3/4M3

Plants

Animals

SaltfogSaltsprayproong

mg/m3

mg/m2.
d

℃-40~55

%5~95

℃/min

kPa

Anti-mouldandanti­fungus

Anti-rodentbutnot
anti-termites

1000

15

1000

0.5

70~106

Climaticenvi­ronment

2

SolarradiationW/m

Dewdrop

Precipitation
(rain,snowand
hail)

Rainfallintensity

Rainwatertem­perature

CondentialandProprietaryInformationofZTECORPORATION9

mm/mi­n

℃

1120

Itmeetsthedewdrop
requirement.

Itmeetstheprecipita­tionrequirement.

6

5

ZXMBWE9230UserManual

IndexDescription

Freezingand
frost

Maximumwind
speed

m/s

Itmeetsthefreez­ingandfrostrequire­ment.

50

ComplianceStandards

TheZXMBWE9230complieswiththefollowingstandards:

�IEEEStandard802.16-2005Part16:AirInterfaceforFixedand

MobileBroadbandWirelessAccessSystems

�WiMAXForumTMMobileRadioConformanceTests(MRCT)

�WiMAXForumTMMobileProtocolImplementationConformance

Statement(PICS)Proforma

�WiMAXForumTMMobileSystemProle

ProtocolInterface Description

ASNNetworkReferenceModel

Figure8illustratestheASNnetworkreferencemodelformulated

byWiMAXNWG.

10CondentialandProprietaryInformationofZTECORPORATION

FIGURE8ASNNETWORKREFERENCEMODEL

Chapter1ProductOverview

Table6describestheseinterfaces.

TABLE6ASNINTERFACEDESCRIPTION

Inter­face

R1

R3

R4

R6

R7

Description

AirinterfacebetweenATandRRU

InterfacebetweenAGW(alsocalledAccessService
NetworkGateWay(ASN-GW))andthecorenetwork

InterfacebetweenASNsorAGWs.Itimplementshandoff
relatedsignalinganddatachannelthatissetupto
maintaindataconsistencyduringhandoff.

InterfacebetweenAGWandBTS

(Optional)InternalinterfaceofAGW .ItdividesAGWinto
thepolicydecisionpartandthepolicyrealizationpart.

ProtocolInterfaces

ZXMBWE9230supportsR1interfaceandR6interface,asshown
inFigure9

.

CondentialandProprietaryInformationofZTECORPORATION11

ZXMBWE9230UserManual

FIGURE9ZXMBWE9230INTERFACES

Thefollowingisthedescriptionoftheinterfaces.

�R1interface

R1interfaceistheinterfacebetweentheBSandtheMS,con­tainingMAClayer ,physicallayerandrelevantmanagement
plane.Itcomplieswiththe802.16eprotocol.

�R6interface

R6interfaceisbetweentheBSandtheAGW.Itcontainsthe
dataplaneandcontrolplane.

�Dataplane

DataplaneistheIPtunnelbetweentheAGWandtheBS.It
isusedtodifferentiatethetrafcowswithdifferentQuality
ofService(QoS)levels.

�Controlpane

Controlplanesupportsthetunnelmanagement,Authen­tication,Authorization,Accounting(AAA)andRadioRe­sourceManagement(RRM)functions.

R1Interface

ShortDescription

R1interfaceistheinterfacebetweentheBSandtheMS,contain­ingMAClayer ,physicallayerandrelevantmanagementplane.It
complieswiththe802.16eprotocol.

MessageFormat

Table7describestheMAClayermanagementmessageformatof

theR1interface.

12CondentialandProprietaryInformationofZTECORPORATION

TABLE7R1MESSAGEFORMAT

ContentDescription

MessageType

Non-TLVeld

Chapter1ProductOverview

Thersteldofeverymanagementmessageis
MessageType.T oknowthevalueofthiseld,
refertothecontentofMACmanagementmessage
intheprotocol.

Thiseldissequencedstrictlyaccordingtothe
denitionofmessageformat.Thecorresponding
valuesofvariouseldsaresortedstrictlyaccord­ingtothesequencedenedbythemessagefor­mat.

ProtocolStack

TLVeld

Thiseldisatripleeld,thatis,type-length­value.Themessagesortsthetripleofsucheld
accordingtotheactualsituation.

TheR1interfacecontainsMAClayerandphysicallayer .TheMAC
layercontainsthreesub-layers,thatis,service-specicConver­genceSub-layer(CS),MACCommonPartSub-layer(MACCPS)
andsecuritysub-layerinthetop-downsequence.

CSsub-layer:TheCSsub-layerconverts/mapstheexternaldata
receivedbyCS-SAPintoMACSDUandtransmitsthedatatoMAC
CPSthroughMACSAP .Thesub-layerclassiesexternalService
DataUnits(SDUs)andassociatesthemwithproperSFIDsand
CIDs.Itsupportsthepayloadheadcompressionfunctionandpro­videsvariousservice-specicconvergencesub-layerspecications
fordifferentexternalprotocolinterfaces.

MACCPSsub-layer:TheMACCPSsub-layerdoesnotresolvethe
payloadattheCSsub-layer .TheMACCPSsub-layersupports
thecorefunctionsoftheMAClayer ,includingbandwidthrequest,
connectionsetupandmaintenance.Itreceivesdataofvarious
CSsub-layersthroughtheMACSAPandclassiesthesedataby
differentMACconnections.ItsQoSisappliedtotransmissionand
schedulingabovethephysicallayer .

�Securitysub-layer:TheMAClayercontainsanindependent

securitysub-layerthatprovidesauthentication,safekeyex­changeandencryption.

�Thephysicallayerhasmultiplespecications,eachofwhich

correspondstoaspecicfrequencyrangeandapplication.

Figure10illustratestheR1interfaceprotocolstack.

CondentialandProprietaryInformationofZTECORPORATION13

ZXMBWE9230UserManual

FIGURE10R1INTERFACEPROTOCOLSTACK

MessageFormat

PhysicalLayer

ControlPlane

TheR1interfaceadoptsOrthogonalFrequencyDivisionMultiplex­ing(OFDM)atthephysicallayer .

R6Interface

R6interfacedenestheprocessingowbetweenBSandASN-GW.
ThesignalingbetweentheBSandtheASN-GWistransmitted
throughtheR6tunnelintheformatofUserDatagramProtocol
(UDP)plusthesignalingformatdenedbyNWGstage3.Theme-
diaplanedataisborneovertheencapsulationtunnelprotocol.

UDPbearsR6signaling.GenericRoutingEncapsulation(GRE),
MultipleProtocolLabelSwitching(MPLS)andVirtualLocalArea
Network(VLAN)bearsR6data.

TheASN-GWterminatestheR6tunnelfromtheBS.TheR6tunnel
canadoptvariousencapsulationtechnologies,suchasGRE,MPLS
andVLAN,anddifferenttunnelgranularitiesareallowed.TheR6
datapathsupportsencapsulationprotocolandtunnelgranularity
negotiation.

Figure11describesthecontrolplanemessageformatoftheR6

interface.

14CondentialandProprietaryInformationofZTECORPORATION

Chapter1ProductOverview

FIGURE11R6CONTROLPLANEMESSAGEFORMAT

Table8liststhedescriptionoftheeldintheR6controlplane

message(followingthebyteorder).

TABLE8R6CONTROLPLANEMESSAGEFIELDDESCRIPTION

FieldDescription

Version

Protocolversionnumber .

FlagsBytelength.

FunctionT ype

Indicatesthefunction,suchasHO
Control.

OPID

MessageT ype

Indicatestheoperationtype.

Messagetypecorrespondingto
FunctionType,suchasHO_Req.

LengthMessagelength,includingthe

messagehead.

MSID

MACaddressoftheMSthatis
relatedtothemessage.Ifthe
messageisnotrelatedtoany
specicMS,allbitsofthiseld
aresetto0.

Reserved32reservedbits,whicharesetto

0.

TransactionID

TransactionID.Ifitis0,the
messageshouldbediscarded.

ReservedReservedbit,whichissetto0.

DestinationIdentierTLV
(Type/Length/Value)

CondentialandProprietaryInformationofZTECORPORATION15

Length-variabledestinationentity
identier .Forexample,the
destinationtowhichthemessage
istobesentisthenetwork
nodeIDofafunctionalentity.
Themessagereceiverchecks
whetherDestinationIdentierin
themessageheadisthesameas
itsownIdentierbeforeaccepting
themessage.Ifyes,thereceiver
willprocessthismessage.If
no,thereceiverwilltransit

ZXMBWE9230UserManual

FieldDescription

themessagetothedestination
identierwithoutchangingit.

SourceIdentierTL V

TLVs

Length-variablesourceentity
identier ,forexample,the
networkIDofafunctionalentity
thatoriginatesthemessage.

Atripletfollowingthemessage
head.

Figure12illustratesthedetailedformatoftheFlagseld.

FIGURE12FLAGSFIELDFORMAT

Table9liststheFlagseldsandtheirdescription.

TABLE9FLAGSFIELDDESCRIPTION

FieldDescription

r

T

Reservedbit,whichmustbesetto0.The
receivershouldignorethereservedbit.

Ifthisbitiscongured,themessage
shouldcontainSourceIdentierTLVand

DestinationIdentierTLV.

ControlPlane

ProtocolStack

PhysicalLayer

R

ResetsthenextexpectedTransactionID.

Figure13illustratesthestructureoftheR6controlplaneprotocol

stack.

FIGURE13R6CONTROLPLANEPROTOCOLSTACK

AlogicalconnectivitybetweenL2/L3oftwocontrolplaneprotocol
stacksenablescommunicationbetweenthetwofunctionalentities.
TheencapsulationofIPpacketsbetweenthetwofunctionalenti­tiesreliesontheconnectivitytype,suchasGREtunnel.Theseal
oftheencapsulatedpacketcontainsaddressinformation,which
ensuresthatthepacketcanbesenttothecorrectphysicalentity .

ThephysicallayeroftheR6interfacesupportspacketaccessand
TimeDivisionMultiplexing(TDM)access.

16CondentialandProprietaryInformationofZTECORPORATION