Enterasys Networks 7G4205-72, 7G4285-49 Connecting UTP Cables to DFE Modules

Connecting to the Network

DFE-Platinum Series Hardware Installation Guide 3-13

Connecting UTP Cables to DFE Modules

ThefixedRJ45frontpanelconnectionsofthe7G4285‐49and7G4205‐72are10/100/

1000 Mbpsports.Theseportshaveinternalcrossovers,and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.

TheRJ45fixedfrontpanelconnectorsofthe7G4285‐49and7G4205‐72alsosupport

PoE‐compliantconnectionstoPDs(powereddevices)thatrequire48Vdcthroughthe

UTPcabletooperate.Whenthe48VdcisavailablethroughthebackplaneofanN5

chassisorexternallyfromanN‐POEPowerSystem,youcanverifyifthereispowerat

eachportasdescribedlaterinthisprocedure.

ToconnectandverifyUTPcableconnectionstoRJ45ports(1through48or72),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. InserttheRJ45connectoronthetwistedpairsegmentintotheappropriateRJ45port

connector.

Note: All RJ45 front panel ports on these DFEmodules support Category 5 Unshie lded

Twisted Pair (UTP) cabling with an impedance between 85 and 111 ohms. Category3

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

Caution: To prevent damage to the equipment, do not connect the PoE supported ports

(1 through 48 or 72) to segments running between buildings. Keep connections to

equipment within the building.

Precaución: Para evitar que el equipo se dañe, no conecte los puertos PoE

(1 a 48 o 72) a segmentos que vayan de un edificio a otro. Mantenga las conexiones de

los equipos dentro del edificio.