Enterasys Networks A2H124-24FX Manual

A SERVICE OF

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Connecting to the Network

3-30 Hardware Installation

Connecting UTP Cables to RJ45 Mini-GBIC Ports

TheRJ45Mini‐GBIC(MGBIC‐02)portsare10/100/1000Mbpsportsandhaveinternal

crossovers.Whenconnectingaworkstationtotheseports,useastraight‐throughcable.

Whenconnectingnetworkingdevicestotheseports,suchasabridge,repeater,orrouter,

useacrossovercable.

Toconnecttwistedpairsegmentstothe

switch,refertoandproceedasfollows:

1. Ensurethatthedevicetobeconnectedattheotherendofthesegmentis

powered ON.

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

twistedpairsegmentintotheRJ45Mini‐GBIC.

3. Verifythatalinkexistsby

checkingthattheLink/Activi tyLEDisON(solidgreenor

blinkinggreen).IftheLink/ActivityLEDisOFF,performthefollowingstepsuntilitis

on:

a. VerifythatthecablingbeingusedisCategory 5orbetterwithanimpedance

between85and111 ohmswithamaximumlengthof100meters(328

feet).

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

properlyconnectedtothesegment.

c. 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 3‐16and 

Figure 3‐17forfour‐wireRJ45connections.RefertoFigure 3 ‐18andFigure 3‐19

foreight‐wireRJ45connections.

d. EnsurethatthetwistedpairconnectionmeetsthedB

lossandcablespecifications

outlinedintheCablingGuide.Referto“RelatedDocuments”onpage xvifor

informationonobtainingthisdocument.

4. Ifalinkisnotestablished,contactEnterasys Networks.Referto“GettingHelp”on

page 1‐6fordetails.

Repeatallstepsaboveuntilallconnectionshavebeenmade.

Note: RJ45 Mini-GBIC ports 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.