NIC Specifications
July 1998
D-1
A
P
P
E
N
D
I
X
D
Appendix D NIC SpeciÞcations
D.1 RJ-45 Connector
RJ-45 pinouts are shown below.
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Pin 1: Transmit data +
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Pin 2: Transmit data -
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Pin 3: Receive data +
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Pin 6: Receive data -
Rx/Tx Crossover Cable
If you want a
direct
RJ45
(10/100BaseT) connection from a single
computer to a printer, use a mini-hub and two network cables. We do not
recommend using an
Rx/Tx crossover
cable to defeat the need for a hub
because it is a custom cable that may not be available from a local dealer
or distributor. A crossover cable that is not clearly labeled can also cause
problems if mixed with standard RJ45 network cables.
If needed, you can build an Rx/Tx Crossover cable by using a standard
RJ45 cable and swapping the Transmit (1, 2) and Receive (3, 6) signal
pairs at one end.
IMPORTANT:
Y
ou must use the proper RJ45 connector/cable tools;
otherwise, the cable may be unreliable.
Clearly label a custom cable so you do not confuse it with
standard RJ45 cables.
1 2
3 4
5 6
8
7
