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Chapter 2 — Connecting to the Network
The AUI port is typically used to interconnect hubs using a fiber
or thick Ethernet backbone, as illustrated in Figure 2-5 and Figure
2-6. It can also be used to interconnect hubs using a variety of
media, such as unshielded twisted-pair, depending on the external
transceiver you connect to the port.
A common approach is using two MAUs connected by attaching
the transmit pair of one MAU to the receive pair of another MAU.
As you do this, the integrity of tip-to-tip and ring-to-ring polarity
must be maintained.
Since the AUI port is 802.3 10Base5 compatible, you may use it
according to those specifications, paying special attention to max-
imum distance, number of devices, and termination guidelines.
❖ Note: Make sure SQE (Signal Quality Error) is disabled
on the MAU when it is attached to the AUI Port.
❖
Figure 2-5 Interconnecting Using FOIRL (Fiber Optic Inter-Repeater Link)
Connecting to the
AUI Port
RJ21 10 BASE-T PORTS
IN or OUT
AUI
PARTITION
TRAFFIC
RS232
THROUGH
AMS LINK
UP=PC
DOWN=TERMINAL
END
3-IN-1 UPLINK
BNC
Spare Fuse in Fuse Holder
2A/250V Slow Blow Fuse
Replace Only With Fuse of Same Rating
Fiber Backbone for Segment B connected
to bridge external port with a MAU
Fiber Backbone for Segment A connected
to 3in1 AUI port (bridge hub port) with a MAU