TWISTED-PAIR CABLE AND PIN ASSIGNMENTS
100BASE-TX/10BASE-T Pin Assignments
With 100BASE-TX/10BASE-T cable, pins 1 and 2 are used for transmitting data, and pins 3 and 6 for receiving data.
RJ-45 Pin Assignments
Pin Number | Assignment1 |
1 | Tx+ |
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2 | Tx- |
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3 | Rx+ |
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6 | Rx- |
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1:The “+” and “-” signs represent the polarity of the wires that make up each wire pair.
Because all ports on this switch support automatic MDI/MDI-X operation, 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. The table below shows the 10BASE-T/100BASE-TX MDI and MDI-X port pinouts.
Pin | MDI-X Signal Name | MDI Signal Name |
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1 | Receive Data plus (RD+) | Transmit Data plus (TD+) |
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2 | Receive Data minus (RD-) | Transmit Data minus (TD-) |
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3 | Transmit Data plus (TD+) | Receive Data plus (RD+) |
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6 | Transmit Data minus (TD-) | Receive Data minus (RD-) |
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No other pins are used.
Note: If auto-negotiation is disabled for an RJ-45 port, the auto-MDI/ MDI-X pin signal configuration is also disabled.