Installation guide

PCI-SB StarFabric PCI Interface Card Installation Guide A-3
Cable & Port Pinouts
RJ-45 Pin Layout
The Dual RJ-45 connectors use all eight pins in each jack for transmitting and
receiving signals. In each link, one jack receives signals and the other jack trans-
mits signals, as shown in Figure 39.
FIGURE 39. RJ-45 Jacks Transmit and Receive Signalling
If you can’t determine whether or not your RJ-45 cable is a straight-thru
cable or a cross-over cable, use an electronic cable tester to determine
cable type.
Tx - transmits signal
Pin 8
Pin 1
Link 0
Link 1
Rx
Tx
Tx
Rx
Rx1
87654321
Rx2
Rx3
Rx4
Rx5
Rx6
Rx7
Rx8
Tx1
87654321
Tx2
Tx3
Tx4
Tx5
Tx6
Tx7
Tx8
Rx1
87654321
Rx2
Rx3
Rx4
Rx5
Rx6
Rx7
Rx8
Tx1
87654321
Tx2
Tx3
Tx4
Tx5
Tx6
Tx7
Tx8
- Indicates a twisted pair of wires
Rx - receives signal