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BUILDING NETWORK ADAPTER BNA-1C/2CS/2DN
EN1B-0198GE51 R0801 47
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Tx+
Tx-
Rx +
Rx -
Tx+
Tx-
Rx +
Rx -
Figure 7-5: Crossover pinning for BNA to workstation direct-
connections
7.2.2 AUI Connector
The AUI (Attachment Unit Interface) offers an
alternative way of connecting the BNA device to
the Ethernet regardless which Ethernet medium or
technique it uses.
In older network installations Ethernet devices can
be connected directly using a 78 Ω cable to specific
Hubs. In such an environment, the AUI cable
length must not exceed 50m. The end of this 78 Ω
cable is outlet into a 15-pin connector (refer to
Table 7-2).