AT-30xxTR Multiport Repeater
21
BNC Bus
Bussing of the AT-30xxTR multiport repeater is another possibility. You can
accommodate more nodes on your network if you connect the repeaters
through the BNC network port. Note that the worst case, node to node, is
through only two repeaters; one provides the UTP station linkage to thinnet,
and the second repeater connects thinnet through the BNC bus to the AUI
cable. On 10BASE2 thin Ethernet, up to 30 AT-30xxTR Hubs may be
connected in this way, as shown in Figure 17.
Figure 17: Hubs on a Backbone
Using the BNC Network Port
12 UTP Segments
12 UTP Segments
12 UTP Segments
12 UTP Segments
50
Ω
Terminator "ON"
BNC-T
Connector
1
2
3
4
5
6
7
8
9
10
11
12
X
X
X
X
X
X
X
X
X
X
X
ACTIVITY
COLLISION
POWER
1
2
3
4
5
6
7
8
9
10 11 12
1
2
3
4
5
6
7
8
9
10 11 12
TERMINATOR
OFF
ON
PORT OK
RECEIVING
PORT OK
RECEIVING
PORT OK
RECEIVING
POWER
10BASE-T NETWORK PORTS
10BASE-T PORT ACTIVITY
STATUS
AUI
BNC
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
MDI
MDI-X
IEEE 802.3
/ETHERNET
1
0BASE-
T
MUL
TIPORT REPEA
TER
1
2
3
4
5
6
7
8
9
10
11
12
X
X
X
X
X
X
X
X
X
X
X
ACTIVITY
COLLISION
POWER
1
2
3
4
5
6
7
8
9
10 11 12
1
2
3
4
5
6
7
8
9
10 11 12
TERMINATOR
OFF
ON
PORT OK
RECEIVING
PORT OK
RECEIVING
PORT OK
RECEIVING
POWER
10BASE-T NETWORK PORTS
10BASE-T PORT ACTIVITY
STATUS
AUI
BNC
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
MDI
MDI-X
IEEE 802.3
/ETHERNET
1
0BASE-
T
MUL
TIPORT REPEA
TER
1
2
3
4
5
6
7
8
9
10
11
12
X
X
X
X
X
X
X
X
X
X
X
ACTIVITY
COLLISION
POWER
1
2
3
4
5
6
7
8
9
10 11 12
1
2
3
4
5
6
7
8
9
10 11 12
TERMINATOR
OFF
ON
PORT OK
RECEIVING
PORT OK
RECEIVING
PORT OK
RECEIVING
POWER
10BASE-T NETWORK PORTS
10BASE-T PORT ACTIVITY
STATUS
AUI
BNC
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
MDI
MDI-X
IEEE 802.3
/ETHERNET
1
0BASE-
T
MUL
TIPORT REPEA
TER
1
2
3
4
5
6
7
8
9
10
11
12
X
X
X
X
X
X
X
X
X
X
X
ACTIVITY
COLLISION
POWER
1
2
3
4
5
6
7
8
9
10 11 12
1
2
3
4
5
6
7
8
9
10 11 12
TERMINATOR
OFF
ON
PORT OK
RECEIVING
PORT OK
RECEIVING
PORT OK
RECEIVING
POWER
10BASE-T NETWORK PORTS
10BASE-T PORT ACTIVITY
STATUS
AUI
BNC
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
MDI
MDI-X
IEEE 802.3
/ETHERNET
1
0BASE-
T
MUL
TIPORT REPEA
TER
Ethernet
Transceiver
Coaxial Ethernet (10BASE5)
AUI Cable
50
Ω
Terminator "OFF"
50
Ω
Terminator "OFF"
50
Ω
Terminator "ON"
