MRV Communications MR2228-S2C User Manual download pdf (Page 35)

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

Pin MDI Signal Name MDI-X Signal Name

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 One Plus

(BI_D4+)

Bi-directional Data One Plus

(BI_D3+)

8 Bi-directional Data Four Minus

(BI_D4-)

Bi-directional Data Three Minus

(BI_D3-)

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 41

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MRV Communications MR2228-S2C User Manual Page 35

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