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Enterasys Networks 7H4385-49 Computer Hardware User Manual

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Connecting to the Network

DFE-Platinum Series Hardware Installation Guide 3-17

b. EachtimetheGROUPSELECTbuttonispressedforlessthatonesecond,the

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.

c. Verifythatthecabling

beingusedisCategory5UTPwithanimpedancebetween

85and111 ohms.Iftheportistooperateat100 Mbps,category 5cablingmustbe

used.

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

properlyconnectedtothesegment.

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

switchesorhubdevicesandanenduser(computer).RefertoFigure 3‐5and

Figure 3‐6for

four‐wireRJ45connections.RefertoFigure 3‐7andFigure 3‐8for

eight‐wireRJ45connections.

Figure 3-5 Four-Wire Crossover Cable RJ45 Pinouts, Connections Between Hub

Devices

1 RJ45 device port 3 RJ45-to-RJ45 crossover cable

2 Other device port 4 RX+/RX- and TX+/TX- connections.

These connections must share a common color pair.

TX+

TX

RX+

RX 2

1

3

6

TX+

TX

2

1

3

6

RX+

RX

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