Intel PCLA2152B Connection Guidelines, Connecting 100BASE-TX devices, Connecting 10BASE-T devices

Connection Guidelines

Connecting 100BASE-TX devices

	•	Use Category 5 twisted-pair Ethernet (CAT 5 TPE) cable.
OK	•	Always limit the distance between devices connected with TPE
		cable to 100 meters (the IEEE specification requires this).

100 Mbps hubs

•Use a crossover cable to connect the hub to a switch. Use a straight-through cable to connect the hub to a server or workstation. See pages 12-13 for more information on cabling.

No!	• Never connect two hubs operating at 100 Mbps with TPE cabling
	(this violates the IEEE 802.3u Fast Ethernet specification for
	Class I hubs). You must use an Intel Cascade Cable.
100 Mbps hubs	• Never connect a device to the hub at full-duplex. Only the
	optional Ethernet Module or Fiber Module supports full-duplex.

Connecting 10BASE-T devices

•Use Category 3, 4, or 5 twisted-pair Ethernet (CAT 3, 4, or 5

OKTPE) cable.

• Use a crossover cable to connect a hub to another hub or a switch.

	Use a straight-through cable to connect a hub to a server or
10 Mbps hubs	workstation. See pages 12-13 for more information on cabling.

•Follow the 5-4-3-2-1 general rule when daisy-chaining 10 Mbps

OK	hubs. See page 9 for more information.
	• Always limit the distance between devices connected with TPE
10 Mbps hubs	cable to 100 meters (the IEEE specification requires this).
	• Use an Intel Cascade Cable to connect hubs when:
	- you want all hubs in the stack to count as a single repeater.

•

NOTE

The acronym TPE (twisted-pair Ethernet) refers to Category 3, 4, or 5 unshielded twisted-pair (UTP) cabling or Category 5 shielded twisted-pair (STP) cabling.

-you want to use a single Management Module to manage all hubs in the stack.

Never connect a device to the hub at full-duplex. Only the optional Ethernet Module or Fiber Module supports full-duplex.

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