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13
Connecting Hubs Using 10BASE-2
Connect a 10BASE-2 ‘Y’ piece to each of your hubs
(Hub 4C only). Connect the ‘Y’ pieces with 10BASE-2 cable
to form a single segment, as shown in Figure 4. Remember
to terminate the two free ends of the segment by fitting
terminators (end pieces).
To disconnect a 10BASE-2 cable, twist each connector
counter-clockwise to unlock it, and remove it.
If you have connected a 10Mbps Ethernet transceiver
to the AUI port, the 10BASE-2 port will be disabled.
You can use this transceiver to connect your hubs but
we recommend that you connect your hubs using
10BASE-T cable (refer to the next section).
When using 10BASE-2 cable, it is important that both
ends of the segment are properly terminated with 50
Ohm terminators (end pieces).
Only use 50 Ohm 10BASE-2 cables and a ‘Y’ piece for
each hub. You can use ‘T’ pieces but ‘Y’ pieces
provide optimum clearance of the other ports.
Checking Connections
When you have connected your hubs, power them on.
The Port Status LEDs for the 10BASE-2 ports you have used
should be off. If they are not, check your connections.
Figure 4
Correct Hub Connections Using 10BASE-2
50 Ohm
terminator
10BASE-2 50 Ohm cable.
Minimum length of
each cable is 0.5m (1.6ft)
Maximum segment length is 185m (607ft)
(from terminator to terminator)
‘Y’ piece
50 Ohm
terminator
Uplink
Normal
Uplink
Normal
Uplink
Normal
AUI
AUI
AUI
AUI
3C16700.book Page 13 Wednesday, July 7, 1999 5:46 PM