Vigitron Vi3010 Installation And Getting Started Manual page 35

1000Base-T Pin
Assignments
Cable Testing for
Existing Category 5
Cable
EIA/TIA 568B RJ-45 Wiring Standard
10/100BASE-TX Crossover Cable
Figure 21: Crossover Wiring
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 pin outs. 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 ft).
Pin MDI Signal Name
1 Bi-directional Pair A Plus
(BI_DA+)
2 Bi-directional Pair A Minus
(BI_DA-)
3 Bi-directional Pair B Plus
(BI_DB+)
4 Bi-directional Pair C Plus
(BI_DC+)
5 Bi-directional Pair C Minus
(BI_DC-)
6 Bi-directional Pair B Minus
(BI_DB-)
7 Bi-directional Pair D Plus
(BI_DD+)
8 Bi-directional Pair D Minus
(BI_DD-)
Table 12: 1000BASE-T MDI and MDI-X Port Pin-Outs
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."
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-)
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