home▶resources▶Guides▶Hardware▶Network▶Network cable

italian

Straight and crossed network cables 10/100/1000baseT

The plug

An Ethernet cable 10/100/1000 base T uses a connector named RJ45, illustrated on the side.

The cable

Only 4 wires (2 pairs) are needed for 10/100baseT straight or crossed cables, while all of the wires (4 pairs, 8 wires) are needed for a 1000baseT cable.

The cable is composed by 4 pairs of wires, twisted, and is named UTPcat5 (Unshielded Twisted Pair category 5).
A 1000baseT cable is UTPcat5e (enhanced) or CAT6.

Overall considerations

• maximum length is 100m
• never keep in the wall close to power cables
• the schemas below are valid for 10/100/1000baseT

Straight cable
NamePinColorPinName
TX+1White/Orange1TX+
TX–2Orange2TX–
RX+3White/Green3RX+
BI4Blue4BI
BI5White/Brown5BI
RX–6Green6RX–
BI7White/Blue7BI
BI8Brown8BI
Cross cable (sorted)
NamePinColorPinName
TX+1White/Orange3RX+ 1White/Green
TX–2Orange6RX– 2Green
RX+3White/Green1TX+ 3White/Orange
BI4Blue7BI 4White/Blue
BI5White/Brown8BI 5Brown
RX–6Green2TX– 6Orange
BI7White/Blue4BI 7Blue
BI8Brown5BI 8White/Brown

RJ45 Network plug

RJ45 plug - end view

RJ45 slot - front view