LevelOne GSW-2476 Benutzerhandbuch

B-5

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).

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.”

1

Bi-directional Data One Plus (BI_D1+)

Bi-directional Data Two Plus (BI_D2+)

2

Bi-directional Data One Minus (BI_D1-)

Bi-directional Data Two Minus (BI_D2-)

3

Bi-directional Data Two Plus (BI_D2+)

Bi-directional Data One Plus (BI_D1+)

4

Bi-directional Data Three Plus (BI_D3+)

Bi-directional Data Four Plus (BI_D4+)

5

Bi-directional Data Three Minus (BI_D3-)

Bi-directional Data Four Minus (BI_D4-)

6

Bi-directional Data Two Minus (BI_D2-)

Bi-directional Data One Minus (BI_D1-)

7

Bi-directional Data Four Plus (BI_D4+)

Bi-directional Data Three Plus (BI_D3+)

8

Bi-directional Data Four Minus (BI_D4-)

Bi-directional Data Three Minus (BI_D3-)