14
FIBER OPTIC CONVERTERS I & II
3.2 LEDs
Figure 3-2 shows the front-panel
LEDs.
POWER
DATA
RX
TX
DATA
RX
TX
CONFIG
Figure 3-2. Front Panel LEDs.
When the
Power
LED is lit, power is
being supplied to the unit. When the
Data
LED is lit, data is being
transmitted on the RJ-45 side.
3.3 RJ-45 Connectors
Figure 3-3 shows the transmit and
receive pins of the RJ-45 connectors
in all configurations. Configuration
of the RJ-45 copper connectors is
discussed in Chapter 4.
RJ-11 male connectors may be used
instead of RJ-45 male connectors on
the twisted-pair cable connected to
the RJ-45 connector. Whether you
use RJ-45 or RJ-11 male connectors,
the transmit and receive pins are
always the four center pins in the
connector, as shown in Figure 3-3.
NOTE
The shielded or unshielded
twisted-pair copper cable
used with the Converters
must have at least two
twisted pairs of wire. This
means a minimum of four
separate wires, whether or
not all four will be used.
Also, the cable must be
wired “straight through,” as
shown in Figure 3-4. Do not
twist transmit and receive
wires in the same twisted
pair; Figure 3-4 shows how
to avoid this.
