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Connecting to Devices
10Mbps
100Mbps
6
Connection Guidelines
General
• The 140T is capable of autonegotiating port speed and can operate at
10Mbps or 100Mbps per port. The hub matches the highest possible
speed of an attached device.
• The ports on the 140T hub are half-duplex. The hub cannot connect
to a device at full-duplex.
• To prevent a loop in the network, do not connect the 140T to 10Mbps
and 100Mbps segments simultaneously if the 10Mbps and 100Mbps
segments are bridged externally (through a switch).
Cabling
• Use Category 5 unshielded twisted-pair (CAT 5 UTP) cable when
connecting 100Mbps devices to the hub.
• Use Category 3, 4, or 5 unshielded twisted-pair (CAT 3, 4, 5 UTP)
cable when connecting 10Mbps devices to the hub.
• Limit the cable length between devices to 100 meters.
• Use crossover cables or the daisy-chain port to connect to a hub
or switch.
• Use a straight-through cable to connect the hub to a server or
workstation. For more information on cabling, see pages 8-9.
Bridging Segments
A bridge allows two segments to communicate with each other. Typically, a
bridge connects segments operating at different speeds. The 140T contains
an internal bridge that automatically allows devices operating at 10Mbps to
communicate with devices operating at 100Mbps.
10Mbps Hub
10
10Mbps
Clients
®
Intel
Express 140T
Collisions
Power
10Mbps
100Mbps
Standalone Hub
or
1
2
3
4
1
2
3
4
5
6
7
8
Solid green = Link
Port
Blinking green = Activity
Activity
9
10
11
12
13
14
15
16
Orange = Autodisabled
Daisy-chain
1
2
3
4
5
6
7
8
Port
Solid Green = 100Mbps
9
10
11
12
13
14
15
16
Speed
Off = 10Mbps
i
10Mbps
100Mbps
9
10
11
12
R
Traffic %
MDI
1
5
10
30
40
50+
1
5
10
30
40
50+
10 and
100Mbps
Clients
5
6
7
8
13
14
15
16
Class II
Server
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