30 10/100 Managed Hub
Module LH8100C-3TX
Module LH8100C-3TX is a 3-port bridge module with a two port internal
bridge for bridging 10Mbps and 100Mbps segments and an external
10/100BASE-TX distance extender with MDI-X and MDI-II interfaces
using an RJ-45 cable. Both of these functions can be enabled at one time,
in fact, the distance extender is always enabled. The internal or external
bridge must be enabled or disabled with on board jumpers before installa-
tion. Module flow-control (backpressure) can be enabled or disabled by
setting the on board jumpers before installation. The default settings are
as follows:
• Bridge Function setting: Internal and External enabled
(Default)
• Backpressure setting: Disabled (Default)
Module LH8100C-3TX Bridge Jumpers
The default jumper setting of the internal bridge of Module LH8100C-
3TX is enabled. The external distance extender is always enabled. To
disable the internal bridge, change the jumpers (JP2, J4 ~ JP6) from 2&3
to 1&2.
Jumpers JP2, JP4 ~ JP6
• 1&2 connected = internal bridge is disabled
• 2&3 connected = internal bridge is enabled (Default)
Module LH8100C-3TX Backpressure Jumpers
The default jumper setting for backpressure is disabled. To enable the
backpressure function, change JP1 and JP7 jumpers to 2&3.
Jumpers JP1, JP7
• 1&2 = disabled (Default)
• 2&3 = enabled
100M
3 Ports
Switch Module
FDX
COL
LINK
TX
RX
100BASE-TX
MDI-II
MDI-X
2
