HP EISA/PCI Multiplexer Manual page 20

Figure 18 RJ-45 port module connector orientation and fan out cable
The pinouts for all RJ-45 jacks are shown below (see Figure 4-8).
Figure 19 RJ-45 jack pinouts
NOTE: In RS-422 terminology, RX- is sometimes labeled as RX(a) or Receive(a), while TX- is often
labeled as TX(a) or Transmit(a). The RX- signal should be attached from the port module to the TX-
signal of the device.
Please note the following cabling considerations:
All jacks on the RJ-45 port module face the front of the product with the key pointed down.
Refer to Figure 4-7 for the modular jack wiring orientation.
Either twisted-pair or flat modular cable may be used as a signal path from RJ-45 port module
or fan out cable ports to peripheral devices. However, twisted-pair cables significantly increase
the operating distance between ports and peripheral devices. Flat modular cable may reduce
the operating distance.
20 Port to Device Cabling