Enterasys-networks Enterasys Gold Distributed Forwarding Engine 4H428 Manuel d'utilisateur télécharger pdf (Page 41)

Connecting to the Network

Matrix DFE-Gold Series Modules Hardware Installation Guide 3-11

Connecting UTP Cables to 4H4282-49 or 4H4202-72

ThefixedRJ45frontpanelconnectionsofthe4H4282‐49and4H4202‐72are10/100Mbps

ports.The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,regardlessifthe

connectionis

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

Inthisprocedure,the 4H4282‐49isusedas theexampletoconnectatwistedpairsegment

withRJ45connectorstotheDFE‐Gold module.RefertoFigure 3‐4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.

Note: All RJ45 front panel ports on the 4H4282-49 and 4H4202-72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.

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Enterasys-networks Enterasys Gold Distributed Forwarding Engine 4H428 Manuel d'utilisateur Page 41