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The front panel of the 24 port hub displays:
❑
Twenty-four dual speed (UTP) Ethernet ports
❑
One uplink switch button
❑
LED indicators.
These features are shown in Figure 2-2.
Figure 2-2 NetStacker II 24 port front panel
LED Indicators
The front panels of the NetStacker II dual speed hubs display LED indicators,
as shown in Figure 2-3. The LED nomenclature, color, and function are as
follows:
❑
Power (green): Illuminates when AC power is applied to the hub.
❑
Collision “COL” (amber): A collision occurs when two or more sta-
tions in the Ethernet network attempt to transmit data at the same
time. The LED flashes to indicate a collision while the stations re-
transmit. There is one LED for 10Mbps and one for 100Mbps.
❑
Hub ID Number (green): Indicates the ID of the hub if it is part of a
stack; this identifying number is auto-configured, from one to eight.
❑
Link Activity “100Mbps/10Mbps” (green): Indicates that a device is
connected to the port number, and that either a 10Mbps (lower
LED) or 100Mbps (upper LED) link is detected. If the link is
detected, the LED turns on. If data is transmitting, the LED blinks.
13 14 15 16 17 18 19 20 21 22 23 24
123456789101112
MII
Module
Slot
NS2024
Uplink
Normal
Uplink
100M
10M
COL
Power
NetStacker II
Hub ID Number
1
23
4
5
6
7
8
9
10 11
12
1
23
4
5
6
7
8
13
14 15
16
17
18
19
20
21
22 23
24
100Mbps
10Mbps
100Mbps
10Mbps
Stackable Dual-Speed Hub
SHBBook Page 2 Wednesday, March 3, 1999 8:03 PM