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FastHub 8 and FastHub 16 Installation Guide
Front Panel LEDs
Power. Indicates that the hub is receiving power and is operational.
Collision 10M/100M. Each unit has two Collision LEDs: 10M indicates a collision
on the 10 Mbps segment, and 100M indicates a collision on the 100 Mbps
segment. A collision occurs when two stations within a collision domain
attempt to transmit data at the same time. The contending adapters resolve
each collision by means of a wait-then-retransmit algorithm. Intermittent
flashing of the Collision LED is normal. Frequency of collisions is an indicator
of heavy traffic on the network.
100M. When lit this LED indicates the port is operating and/or configured
(Ports 1 and 2) at 100 Mbps. When the LED is OFF (not lit), the port is
operating and/or configured at 10 Mbps. Each port has a 100M LED.
Link/Activity/Error. Steady green (Link state) indicates that the port has good
linkage to its associated device. Flashing green (Receive state) indicates that
the port is receiving data from its associated device. Flashing yellow indicates
that an error occurred and that the port is partitioned. Each port has a Link/
Activity/Error LED.
Back Panel LEDs
Connectors, the Port 1 and 2 speed DIP switch and the uplink switch are on
the back panel of the hub.
Speed DIP Switch. This DIP switch manually selects auto-negotiation, 10 Mbps,
or 100 Mbps speed for Port 1 and Port 2. Figure 3 shows an close-up of the DIP
switch setting. In the example below, Port 1 is in the Auto position and Port 2
is in the 100M position.
1
2
3
4
Figure 3 Close-up of DIP Switch Setting
Ethernet Ports. The hub has 8 or 16 ports located on the back panel; all are auto-
negotiating, dual speed 10Base-T/100Base-TX ports.
3
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