B. Network Components and Cabling
50
Front Plane
Thick
Thin
ZT8995
J1
J2
J4
J3
Pair
Interrupts
Ethernet
Ethernet
Twisted
ZT 8995 -D1
ZT 8995 -D1
Frontplane Connectors
Thick Ethernet
Thick Ethernet cabling (10Base5) uses an Attachment Unit Interface (AUI) drop cable,
also known as a Media Attachment Unit (MAU), to connect the ZT 8995-D2 to an
external transceiver. The MAU connects to the Ethernet trunk (or backbone) coaxial
cable to provide access to the other Thick Ethernet network components. Thick
Ethernet uses the female 15-pin D connector (J3) on the ZT 8995-D2 frontplane for the
AUI interface. Refer to the figure "
Frontplane Connectors
" above.
Twisted-Pair Ethernet
Twisted-Pair Ethernet cabling (10BaseT) uses a star topology, rather than the bus
topology used for Thin and Thick Ethernet. A star topology connects all nodes to a
central hub (repeater or bridge) rather than tapping the node off the coax bus. Each
twisted-pair node receives its signals from the same repeating originator. Therefore,
every node has its own data link. The communication rate is equal to that of Thin and
Thick Ethernet, which is specified to be 10 Mbps. Twisted-Pair Ethernet allows the use
of inexpensive, unshielded, twisted-pair wiring. However, it requires that each node
have its own repeater, bridge, or host input.
The ZT 8995-D1 10BaseT connection uses an RJ-45 connector (
J2
). Refer to the figure
"
Frontplane Connectors
". This connector can be linked directly to the central hub
(repeater or bridge) or host using the twisted-pair wiring.
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