User's Manual

T WISTED -P AIR C ABLE AND P IN A SSIGNMENTS
B-3
The RJ-45 ports on the switch base unit support automatic MDI/MDI-X
operation, you can use straight-through cables for all network connections
to PCs or servers, or to other switches or hubs. In straight-through cable,
pins 1, 2, 3, and 6, at one end of the cable, are connected straight through
to pins 1, 2, 3, and 6 at the other end of the cable. When using any RJ-45
port on this switch, you can use either straight-through or crossover cable..
Straight-Through Wiring
If the twisted-pair cable is to join two ports and only one of the ports has
an internal crossover (MDI-X), the two pairs of wires must be
straight-through. (When auto-negotiation is enabled for any RJ-45 port on
this switch, you can use either straight-through or crossover cable to
connect to any device type.)
Figure B-2. Straight-through Wiring
Pin MDI-X Assignment MDI Assignment
1 Input Receive Data + Output Transmit Data +
2 Input Receive Data - Output Transmit Data -
3 Output Transmit Data + Input Receive Data +
6 Output Transmit Data - Input Receive Data -
4,5,7,8 Not used Not used
Note: The "+" and "-" signs represent the polarity of the wires that make
up each wire pair.
White/Orange Stripe
Orange
White/Green Stripe
Green
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
EIA
/
TIA 568B RJ-45 Wiring
S
tandard
10/100BASE-TX Straight-through Cable
End A
End B