SMC Networks SMC7824M/FSW Manual de usuario descargar pdf (Pagina 74)

ABLES

B-2

10BASE-T/100BASE-TX Pin Assignments

Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for

RJ-45 connections: 100-ohm Category 3, 4 or 5 cable for 10 Mbps

connections or 100-ohm Category 5 cable for 100 Mbps connections. Also

be sure

that the length of any twisted-pair connection does not exceed 100

meters (328 feet).

The RJ-45 ports on the switch 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. In straight-through cable, pins 1,

2, 3, and 6, at one end of the cable, are connected straight through to pins

1, 2, 3, and 6 at the other end of the cable. When using any RJ-45 port on

these switches, you can use either straight-through or crossover cable.

Note: Auto-negotiation must be enabled for automatic MDI/MDI-X

pinout configuration.

Table B-1 10/100BASE-TX MDI and MDI-X Port Pinouts

Pin MDI Signal Name MDI-X Signal Name

1 Transmit Data plus (TD+) Receive Data plus (RD+)

2 Transmit Data minus (TD-) Receive Data minus (RD-)

3 Receive Data plus (RD+) Transmit Data plus (TD+)

6 Receive Data minus (RD-) Transmit Data minus (TD-)

4,5,7,8 Not used Not used

Note: The “+” and “-” signs represent the polarity of the wires that

make up each wire pair.

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 107 108

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SMC Networks SMC7824M/FSW Manual de usuario Pagina 74