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3-12
C
3: M
HAPTER
AKING
Operation LEDs
Unit Digital Display
FMS 100-TX H
C
UB
ONNECTIONS
Table 3-3 interprets the meaning of the hub operation LEDs.
Table 3-3 Hub Operation LEDs
LED
Color
FAN FAIL
Amber
OVERTEMP
Amber
COLLISION
Green
CLS II (Class II)
CLS I (Class I)
Green
PWR (Power)
Green
The front panel unit digital display (see Figure 3-11) provides a numeric
designation for each component in a hub stack, including a Management Unit
if one is present. Unit numbers are assigned dynamically as the units are
plugged into the stack. The Management Unit ID is assigned after the
Power-On Self-Test (POST) has run. The number 1 indicates the device that has
no other unit above it; in other words, the hub (or Management Unit) that is on
the top of the stack and connected by a hub expansion cable to the
component immediately below it.
STATUS
ACTIVITY
12x
LINK
PARTITION
1 2 3 4 5 6 7 8 9 10 11 12 13
Figure 3-11 Unit Digital Display
Status
Meaning
ON
One or both of the two internal fans
have failed.
ON
The internal temperature exceeds 158 F
(70 C).
ON
The segment is experiencing collisions.
OFF
The FMS 100-TX Hub does not support
Class II configuration. This LED is
nonfunctional.
ON
The FMS 100-TX Hub supports Class I
configuration, which means that only
one repeater or hub stack can be used
between two end stations.
ON
The hub is receiving power.
UNIT
3C250-TX/
FAN FAIL
CLSII
OVERTEMP
CLSI
COLLISION
PWR
®
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