Support User Manuals

Enterasys Networks 7G4285-49 Switch User Manual

Open as PDF

of 96

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.

Making the UTP Connections

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 DFE modules 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.

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.

previous next