10770
3
10770
2
Features
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Four or eight 100 BASE - TX ports for Fast Ethernet connectivity
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Compact size for use in the workplace, individual offices or small workgroups
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Complies with IEEE802.3U 100Mb specifications
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Supports Category 5 Unshielded (UTP/STP) twisted-pair cabling
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Push-button up-link switch for cascading, or for detaching the hub from the network in order to
get full 100 Mbps bandwidth locally
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Rubber feet provide stability and scratch-proof placement on finished surfaces
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Four LEDs for “% Utilisation” display
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Global collision status LEd, indicates collisions for all ports on the hub
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Class 11 compliance for 100BASE - TX cascading
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Auto-partioning of ports receiving excessive collisions, removes network faults
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External DC power supply
Package Contents:
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Fast ethernet 100BASE - TX four or eight port hub
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Power adaptor
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User manual.
Hardware Installation
Installation procedure
1. Place FE4 or FE8 on a smooth surface.
2. Connect power adaptor DC jack into the hub, plug the adaptor into a power source.
3. Connect a device to an RJ-45 hub port using category 5 UTP/STP cabling. For unshielded twist
pair, note that the distance between the hub and the device cannot exceed 100 m, and that the
longest UTP cable path through the collision domain (max. of two class 11 cascaded hubs) should
not exceed 205 meters.
4. Connect each applicable device in your network using the same process in Step 3.
Note:
To reliably operate your network at 100bps, you must use Category 5 wiring. Category 3 or
4 wire may sometimes seem to work, but it will normally cause data loss and unreliable
operation.
Stand-alone Configuration
In a simple stand-alone configuration, the up-link button is in the “=” or un-pressed position, and
port 4 (on the FE4) or port 8 (on the FE8) are used to connect to users and other nodes.
1
2
3
4
30+
30
10
1
% Utilization
Col
Pwr
100 M/s
UPLINK
PART
LINK
RX
Figure 1
RS
FE4 Hub (front panel with LEDs)
Multi-level Configurations, Cascading
If you want to connect more than 4 ports (or 8 ports for FE8 Hub) into a collision domain, use the up-
link port to connect to another hub. This is called “cascading”. Simply connect the up-link port (port
4 on the FE4 and port 8 on the FE8) to any port on another hub, with the up-link button pressed.
Note:That cascading configurations should be compliant with Fast Ethernet collision domain
specifications. The
RS
Fast Ethernet Hubs are Class II repeaters.
Troubleshooting
This section contains information to help solve problems. If the Hub is not functioning properly, check
that the hub was set up according to the instructions in this manual.
If the FE4 or FE8 Fast Ethernet 100BASE - TX hub does not connect to the network,
●
Check the Link/Activity LED lights on the Hub. The Link LED should be ON, which indicates that
the physical wiring connection is made on both ends of the wire and that power is ON for the
devices at both ends.
If the Link/Activity LED light is not ON, check all connections at the adaptor or node, and at the
hub.
●
Try another port on the hub.
●
Turn off the power of the hub, after a while re-power the unit.
●
Make sure that the cable is installed properly. The network cable must be securely attached. If the
problem persists, try a different cable.
Other Important Tips
●
Make sure the network adaptor cards installed in the workstations and cable connections are in
good working condition. Also, make sure adaptor drivers are loaded.
●
If you are using the up-link port, confirm that the up-link port is in the correct position: This button
is pressed in for the up-link setting; “un-pressed” for regular (node) setting.
The up-link switch enables cascading when the button is pressed in to the crossover position.
Alternatively, when the button is ‘un-pressed’, the port operates as a normal node-connection
port.
Specifications
Performance:
Data Rate:100Mbits/second
Partioning: Enforced after 63 consecutive collisions
Auto-reconnect: Occurs after one packet of error-free reception
Network Standards:
Ethernet IEEE 802.3u, 100BASE-TX. Supports 802.3u auto-negotiation for connected devices.
The
RS
Fast Ethernet hubs are physical layer ethernet products and operate independently of all
software.
30+
30
10
1
% Utilization
Col
Pwr
GARRETT
1
2
3
4
1
2
3
4
UPLINK
30+
30
10
1
% Utilization
Col
Pwr
GARRETT
1
2
3
4
1
2
3
4
UPLINK
RS FE8 Hub
Up-link switch set
to the ‘X’ position
‘pushed in’
RS FE8 Hub
Two RS FE8 Hubs cascaded
Figure 2
