10Base2/Aui Backbone Port Switches - Allied Telesis AT-MR420TR Installation Manual

10Base5 (Attachment Unit Interface [AUI])
— Located to the right of the BNC port, the 10Base5 network
port connects the repeater to the network using standard (
thick) Ethernet cable and AUI-series connectors.
Alternatively, you can fit an Allied Telesyn 802.3
transceiver into this port for alternative media connections,
for example fiber optics.
Although both network ports are always available, only one can be
active at a time and, since there is no default port, you determine the
active port by using the Backbone Enable and Media Select switches —
both of which will be discussed next.

10Base2/AUI Backbone Port Switches

There are two user-selectable switches: a Backbone Enable and Media
Select. See Figure 4.
AT-MR420TR and AT-MR820TR Installation Guide
Figure 4: Backbone Switches
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