Enterasys Networks 4G4282-49, 6H303-48, 9034096-02 Connecting UTP Cables

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Figure3‐8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(Transm it)
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Figure3‐8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,Category5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.Typicall y,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.