1000Base-T Pin Assignments; Cable Testing For Existing Category 5 Cable; Figure 24 Crossover Wiring - Brocade Communications Systems 6910 Hardware Installation Manual

FIGURE 24

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 7
Pin
1
2
3
4
5
6
7
8

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 tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, "The
Additional Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling."
Brocade 6910 Ethernet Access Switch Hardware Installation Guide
53-1002345-02
CROSSOVER WIRING
EIA/TIA 568B RJ-45 Wiring Standard
1
2
End A
3
4
5
6
7
8
1000BASE-T MDI and MDI-X PORT PINOUTS
MDI Signal Name
Bi-directional Pair A Plus (BI_DA+)
Bi-directional Pair A Minus (BI_DA-)
Bi-directional Pair B Plus (BI_DB+)
Bi-directional Pair C Plus (BI_DC+)
Bi-directional Pair C Minus (BI_DC-)
Bi-directional Pair B Minus (BI_DB-)
Bi-directional Pair D Plus (BI_DD+)
Bi-directional Pair D Minus (BI_DD-)
Twisted-Pair Cable and Pin Assignments
10/100BASE-TX Crossover Cable
White/Orange Stripe
Orange
White/Green Stripe
Blue
White/Blue Stripe
Green
White/Brown Stripe
Brown
1
2
3
4
5
6
7
8
MDI-X Signal Name
Bi-directional Pair B Plus (BI_DB+)
Bi-directional Pair B Minus (BI_DB-)
Bi-directional Pair A Plus (BI_DA+)
Bi-directional Pair D Plus (BI_DD+)
Bi-directional Pair D Minus (BI_DD-)
Bi-directional Pair A Minus (BI_DA-)
Bi-directional Pair C Plus (BI_DC+)
Bi-directional Pair C Minus (BI_DC-)
B
End B
31