Support User Manuals

Enterasys Networks 4G4282-49 Switch User Manual

Open as PDF

of 90

Connecting to the Network

3-16 Installation

Connecting UTP Cables

ThefixedRJ45frontpanelconnectionsofthe4G4202‐72and4G4282‐49are10/100/1000

Mbpsports.Theseportshaveinternalcrossovers,andalsosupportautomatic‐polarity

sensingwhenconfiguredforautomatic‐negotiation.

Ifautomatic‐negotiationisnotactivatedonaport,useastraight‐throughcablewhen

connectingaworkstation

totheport.Whenconnectinganetworkingdevicetotheport,

suchasabridge,repeater,orrouter,useacrossovercable.

Ifaportissetforauto‐negotiation,automatic‐polaritysensingisalsoactivated.

Automatic‐polaritysensingeliminatestheneedforacrossovercable,whetherthe

connectionisto

anothernetworkdeviceoraworkstation.

Inthisprocedure,the 4G4202‐72isusedastheexampletoconnectatwistedpairsegment

tothemodule.Itisalsoassumedthatthechassispoweristurnedontoprovidepowerto

themodule.RefertoFigure 3‐8onpage 3‐17and 

proceedasfollows:

1. EnsurethatthedeviceconnectedtotheotherendofthesegmentispoweredON.

2. ConnectthetwistedpairsegmenttothemodulebyinsertingtheRJ45connectoron

thetwistedpairsegmentintotheappropriateRJ45portconnector.

3. Verifythatalinkexistsbycheckingthattheport

RX(Receive)LEDisON(flashing

amber,blinkinggreen,orsolidgreen).IftheRXLEDisOFFandtheTX(Transmit)

LEDisnotblinkingamber,performthefollowingstepsuntilitison:

a. Toviewthereceiveandtransmitactivityonagroupofsegments,pressthe

GROUPSELECT

button(seeFigure 3‐8onpage 3‐17)tosteptothegroupof

interest(Groups1through3onthe4G4202‐72,orGroups1through5onthe

4G4282‐49).EachtimetheGROUPSELECTbuttonispressed,aGROUPLED

lightsupinsequence,indicatingwhichGroupis

selected.Thereceiveand

transmitactivityfor thatgroupofsegmentsisthenindicatedbytheRXandTX

LEDsforeachsegment.

b. VerifythatthecablingbeingusedisCategory5UTPwithanimpedancebetween

85and111 ohms.Fortheporttooperateat100or1000Mbps,Category 5

cabling

mustbeusedandinstalledproperly.

c. Verifythatthedeviceattheotherendofthetwistedpairsegmentisonand

properlyconnectedtothesegment.

d. VerifythattheRJ45connectorsonthetwistedpairsegmenthavetheproper

pinoutsandcheckthecableforcontinuity.Typically ,acrossovercable

isused

betweennetworkdevices.Astraight‐throughcableisusedtoconnectbetween

switchesorhubdevicesandanendsystem(computer).RefertoFigure 3‐9and

Note: All RJ45 front panel ports on the 4G4202-72and4G4282-49 support Category 5

Unshielded Twisted Pair (UTP) cabling with an impedance between 85 and 111 ohms.

Category 3 cable may be used if the connection is going to be used only for 10 Mbps.

previous next