One Class I Repeater - 3Com 100 TX User Manual

One Class I Repeater

A total network span of 260.8 meters (combined UTP and fiber cabling) is
allowed in single-Class I hub topologies (one hub stack per wiring closet with
a fiber run to the collapsed backbone). For example, you could use a
160.8-meter fiber downlink from the hub to a router, bridge, or switch with a
100-meter maximum UTP run from the hub to the desktops. (See Figure 4-2.)
®
Figure 4-2 Connecting the Hub in a Network Span of 260.8 Meters
The maximum network span using only UTP cabling is 200 meters. If only
fiber cable is used, the maximum span in 272 meters.
Router, bridge,
or switch
LinkBuilder
FMS 100 Hub
(class I)
1x
1x
1x
1x
1x 100 BT
1x
1x
1x
1x
Topology Rules
Fiber backbone
(160.8 meters maximum)
1x
1x
1x
ACTI VITY STA TUS
LINE
PART
ITION
UN IT
1 2
3 4 3C 250
5 6 /
7 8 FAN FAIL
9 10 ® Lin kB uil
11 12 OVER CLS2 de r
TEMP R
13 CLS1 EP EA
COLL TE R
ISION
PWR
UTP cable 100
meters maximum
4-3