3Com 3C16405, User Manual

Page: 34 / 188

DUA1640-5AAA02
2-2
C
HAPTER
2: H
OW THE
PS H
UBS
D
IFFER
PS Hub 40
The PS Hub 40 has two 10Mbps transceiver module slots. When fitted
with transceiver modules, these ports can be port switched to any of
the hub’s four internal segments.
For information on what transceiver modules you can use, refer to
“Using Transceiver Modules” on page 3-12.
PS Hub 50
The main feature of the PS Hub 50 over the PS Hub 40 is that it has an
internal
segment switch
.
Segment Switch The segment switch is an additional part of the PS Hub 50 which links
the stack’s four cascaded segments. It provides switching between the
four cascaded segments in the stack, so that the workstations on those
cascaded segments can communicate across the segment switch.
Using management, you can connect or isolate the segment switch
from the cascaded segments, as shown in Figure 2-1.
Figure 2-1 The PS Hub 50 Unit’s Segment Switch