Cabletron Systems 8H02-16 manual Connecting a UTP Segment to the FE-100TX

Chapter 3: Installation

		TO
	SmartSwitch RJ45 Port
	RX+
		1
NOTE:	RX–	2
RX+/RX– and TX+/TX–
must share a common	TX+	3
color pair.
	TX–	6

TO

10BASE-T Device Port

1 RX+

2 RX–

3 TX+

6 TX–

RJ45 to RJ45

1574-30

Figure 3-6 Cable Pinouts - (RJ45) Crossover Cable

c.Check that the twisted pair connection meets the dB loss and cable specifications outlined in Chapter 2.

If a link is not established, contact Cabletron Systems Technical Support. Refer to Section 1.7, Getting Help, for details.

4.Repeat step 2, above, until all connections have been made.

3.5.2Connecting a UTP Segment to the FE-100TX

An FE-100-TX installed in port slot 15 and/or 16 is often used to provide a connection between the 8H02-16 and a bridge, router, or switch. Usually, in this configuration, a “straight-through” cable is used and the Fast Ethernet Interface Module crossover switch shown in Figure 3-7 is set to “not crossed over.”

Normally, when connecting devices to like devices, crossing over of the transmit and receive pairs must occur. Before connecting a segment to the FE-100TX, check each end of the segment to determine if the wires have been crossed over for the proper connection.

A schematic of a crossover cable is shown in Figure 3-6. If the wires do not cross over, use the switch on the FE-100TX to internally cross over the RJ45 port. Figure 3-7 shows how to properly set the FE-100TX crossover switch.

3-8 8H02-16 User’s Guide