Velleman STP8025 Manual do Utilizador descarregar pdf (Página 2)

Crossoverisusedforhubtohub,computertocomputer,wherevertwo‐waycommunication

isnecessary.AllgigabitEthernetequipment,andmostnew10/100Mbequipment,supports

automaticcrossover,meaningthateitherastraight‐throughorcrossovercablemaybeused

foranyconnection.However, olderequipment requirestheuseofa

strai ght‐throughcable

toconnectaswitchtoaclientdevice,andacrossovercabletoconnectaswitchtoaswitch

oraclienttoaclient.

8P8CWiring(T568A)

PinPairWire Color

1 3 1

white/green

2 3 2

green

3 2 1

white/orange

4 1 2

blue

5 1 1

white/blue

6 2 2

orange

7 4 1

white/brown

8 4 2

brown

Pinson8P8Cplugface



Twistedpaircablesareoftenshieldedinattempttopreventelectromagneticinterference.

Becausetheshieldingismadeofmetal,itmayalsoserveasaground.However,usuallya

shieldedorascreenedtwistedpaircablehasaspecialgroundingwireaddedcalledadrain

wire.Thisshieldingcan

beappliedtoindividualpairs,ortothecollectionofpairs.When

shieldingisappliedtothecollectionofpairs,thisisreferredtoasscreening.Theshielding

mustbegroundedfortheshieldingtowork.

8P8CWiring(T568B)

Pin Pair Wire Color

1 2 1

white/orange

2 2 2

orange

3 3 1

white/green

4 1 2

blue

5 1 1

white/blue

6 3 2

green

7 4 1

white/brown

8 4 2

brown

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