1000Base-T Pin Assignments; Table B-2. 1000Base-T Mdi And Mdi-X Port Pinouts; Figure B-3. Crossover Wiring - Enterasys Matrix-V V2H124-24 Hardware Installation Manual

End A

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).
Pin MDI Signal Name
1 Bi-directional Data One Plus (BI_D1+)
2 Bi-directional Data One Minus (BI_D1-)
3 Bi-directional Data Two Plus (BI_D2+)
4 Bi-directional Data Three Plus (BI_D3+)
5 Bi-directional Data Three Minus (BI_D3-)
6 Bi-directional Data Two Minus (BI_D2-)
7 Bi-directional Data One Plus (BI_D4+)
8 Bi-directional Data Four Minus (BI_D4-)
Cable Testing for Existing Category 5 Cable
Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk
(NEXT), and Far-End Crosstalk (FEXT). This cable testing information is specified in
the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test
parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Crossover Cable
White/Orange Stripe
White/Green Stripe
1
2
3
4
5
6
7
8

Figure B-3. Crossover Wiring

Table B-2. 1000BASE-T MDI and MDI-X Port Pinouts

Twisted-Pair Cable and Pin Assignments
Orange
Green
MDI-X Signal Name
Bi-directional Data Two Plus (BI_D2+)
Bi-directional Data Two Minus (BI_D2-)
Bi-directional Data One Plus (BI_D1+)
Bi-directional Data Four Plus (BI_D4+)
Bi-directional Data Four Minus (BI_D4-)
Bi-directional Data One Minus (BI_D1-)
Bi-directional Data One Plus (BI_D3+)
Bi-directional Data Three Minus (BI_D3-)
B
1
2
End B
3
4
5
6
7
8
B-3