User guide

Reference RLX-IH ♦ 802.11b

Industrial Hotspot

ProSoft Technology, Inc. Page 77 of 99

April 10, 2007

Use a straight-through cable when connecting the radio to an Ethernet hub or a

10/100 Base T Ethernet switch. Straight-through cables are used in most cases.

Use a cross-over cable when connecting the Ethernet radio directly to any device

that is NOT a switch or a hub (e.g., a direct connection to a PC, PLC, or printer).

Ethernet cabling is like U.S. telephone cables, except that it has eight

conductors. Some hubs have one input that can accept either a straight-through

or crossover cable, depending on the switch position. In this case, you must

ensure that the switch position and cable type agree.

Refer to Ethernet cable configuration (page 77) for a diagram of how to

configure Ethernet cable.

6.3.3 Ethernet cable configuration

NOTE: The standard connector view shown is color-coded for a straight-

through cable.

Crossover cable Straight- through cable

RJ-45 PIN RJ-45 PIN RJ-45 PIN RJ-45 PIN

1 Rx+ 3 Tx+ 1 Rx+ 1 Tx+

2 Rx- 6 Tx- 2 Rx- 2 Tx-

3 Tx+ 1 Rx+ 3 Tx+ 3 Rx+

6 Tx- 2 Rx-

6 Tx- 6 Rx-

6.4 Antennas

Only certain antennas can be used with the radio. See Approved antennas

(page 80) for more information.

When you are ready to connect antennas to the radio, see Connecting

antennas (page 22).

You must also consider three important electrical characteristics when selecting

antennas:

 Antenna pattern (page 78)

 Antenna gain (page 78)

 Antenna polarity (page 78)