Enterasys Networks V2H124-24P - Manual (Page 55)

Twisted-Pair Cable and Pin Assignments
B-3
B
Figure B-3. Crossover Wiring
1000BASE-T Pin Assignments
All 1000BASE-T ports support automatic MDI/MDI-X operation, so you can use
straight-through cables for all network connections to PCs or servers, or to other
switches or hubs.
The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These ports
require that all four pairs of wires be connected. Note that for 1000BASE-T
operation, all four pairs of wires are used for both transmit and receive.
Use 100-ohm Category 5, 5e or 6 unshielded twisted-pair (UTP) or shielded
twisted-pair (STP) cable for 1000BASE-T connections. Also be sure that the length
of any twisted-pair connection does not exceed 100 meters (328 feet).
Table B-2. 1000BASE-T MDI and MDI-X Port Pinouts
1000BASE-T MDI and MDI-X Port Pinouts
Pin MDI-X Signal Name MDI Signal Name
1 Bi-directional Data Two Plus (BI_D2+) Bi-directional Data One Plus (BI_D1+)
2 Bi-directional Data Two Minus (BI_D2-) Bi-directional Data One Minus (BI_D1-)
3 Bi-directional Data One Plus (BI_D1+) Bi-directional Data Two Plus (BI_D2+)
4 Bi-directional Data Four Plus (BI_D4+) Bi-directional Data Three Plus (BI_D3+)
5 Bi-directional Data Four Minus (BI_D4-) Bi-directional Data Three Minus (BI_D3-)
6 Bi-directional Data One Minus (BI_D1-) Bi-directional Data Two Minus (BI_D2-)
7 Bi-directional Data One Plus (BI_D3+) Bi-directional Data One Plus (BI_D4+)
8 Bi-directional Data Three Minus (BI_D3-) Bi-directional Data Four Minus (BI_D4-)
White/Orange Stripe
Orange
White/Green Stripe
Green
1
2
3
4
5
6
7
8 1
2
3
4
5
6
7
8
End A End B
White/Brown Stripe
Brown Stripe
Blue
White/Blue Stripe