3Com 100 TX - Manual (Page 34)

3-10 C HAPTER 3: M AKING FMS 100-TX H UB C ONNECTIONS
Class II Repeaters A Class II repeater is a hub with internal delay such that no more than two
hubs can exist between any two DTE devices within a single collision domain
when two maximum-length cable segments are used. The Class II network
topology allows two hubs (or hub stacks) to exist between any two end
stations.
Figure 3-9 shows a two-repeater collision domain containing two hubs
between two end stations that are located 205 meters apart. This is the total
allowable span for UTP cable.
Figure 3-9 Class II Hubs
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT
LINE PARTITION CLS2 3C12345
CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT
LINE PARTITION CLS2 3C12345
CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT
LINE PARTITION CLS2 3C12345
CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT LINE PARTITION CLS2 3C12345 CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT LINE PARTITION CLS2 3C12345 CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT LINE PARTITION CLS2 3C12345 CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT
LINE PARTITION
CLS2 3C12345
CLS1 PWR
FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT
LINE PARTITION CLS2 3C12345
CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT
LINE PARTITION CLS2 3C12345
CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT
LINE PARTITION CLS2 3C12345
CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT
LINE PARTITION CLS2 3C12345
CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT LINE PARTITION CLS2 3C12345 CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT LINE PARTITION CLS2 3C12345 CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT LINE PARTITION CLS2 3C12345 CLS1 PWR FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT LINE PARTITION
CLS2 3C12345
CLS1 PWR
FAN FAIL OVERTEMP COLLISION
® LinkBuilder REPEATER 1x 1x 1x 1x 1x 1x 1x 100BT STATUS 1x 1x 1x 1x 1x
1 2 3 4 5 6 7 8 9 10 11 12 13
ACTIVITY UNIT
LINE PARTITION CLS2 3C12345
CLS1 PWR FAN FAIL OVERTEMP COLLISION
Class II configuration
205 meters: maximum UTP distance
5 meters maximum 100 meters maximum 100 meters maximum