1000base-t pin assignments, Table 14, 1000base-t mdi and mdi-x port pinouts – Microsens MS453490M Installation User Manual

Page 54: 1000base-t pin, 1000base-t p

PPENDIX

| Cables

Twisted-Pair Cable and Pin Assignments

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1000BASE-T P

SSIGNMENTS

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).

ABLE

ESTING

FOR

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ATEGORY

5 C

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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.”

Note that when testing your cable installation, be sure to include all patch cables
between switches and end devices.

Table 14: 1000BASE-T MDI and MDI-X Port Pinouts

Pin

MDI Signal Name

MDI-X Signal Name

Bi-directional Pair A Plus (BI_DA+)

Bi-directional Pair B Plus (BI_DB+)

Bi-directional Pair A Minus (BI_DA-)

Bi-directional Pair B Minus (BI_DB-)

Bi-directional Pair B Plus (BI_DB+)

Bi-directional Pair A Plus (BI_DA+)

Bi-directional Pair C Plus (BI_DC+)

Bi-directional Pair D Plus (BI_DD+)

Bi-directional Pair C Minus (BI_DC-)

Bi-directional Pair D Minus (BI_DD-)