Netcomm NCT240 Manuel D’Utilisation

 

1 

Input Receive Data +

 

Output Transmit Data +

 

2 

Input Receive Data -

 

Output Transmit Data -

 

3 

Output Transmit Data +

 

Input Receive Data +

 

6 

Output Transmit Data -

 

Input Receive Data -

 

 

Auto-negotiation must be enabled for automatic MDI/MDI-X pinout configuration. 

 

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 better 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). 

1 

Transmit Data plus (TD1+)

 

Transmit Data plus (TD2 +)

 

2 

Receive Data minus (RD1-)

 

Receive Data minus (RD2-)

 

3 

Transmit Data plus (TD2+)

 

Transmit Data plus (TD1+)

 

4 

Transmit Data plus (TD3+)

 

Transmit Data plus (TD4+)

 

5 

Receive Data minus (RD3-)

 

Receive Data minus (RD4-)

 

6 

Receive Data minus (RD2-)

 

Receive Data minus (RD1-)

 

7 

Transmit Data plus (TD4+)

 

Transmit Data plus (TD3+)

 

8 

Receive Data minus (RD4-)

 

Receive Data minus (RD3-)

 

 

The PBX/MDF connector is designed to aggregate 24 POTS/ISDN ports. Each wire pair must be 

attached to the RJ-21 connector in a specific orientation detailed below. The following table shows the pin 

assignments.