Cabletron Systems 8H02-16 manual Connecting a Multimode Segment to the FE-100FX

Chapter 3: Installation

3.Verify that a Link exists by checking that the port RX LED is on (flashing green or yellow or on solid green). If the RX LED is off, perform the following steps until it is on:

a.Check that the 100BASE-TX device at the other end of the twisted pair segment is powered up.

b.Verify that the RJ45 connector on the twisted pair segment has the proper pinouts.

c.Check the cable for continuity.

d.Make sure that the twisted pair connection meets dB loss and cable specifications outlined in Section 2.1.2.

e.Confirm that the crossover switch is in the correct position.

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

3.5.3Connecting a Multimode Segment to the FE-100FX

The FE-100FX has an SC style network port (see Figure 3-8). Cabletron Systems supplies fiber optic cable that uses SC style connectors that are keyed to ensure proper crossing over of the transmit and receive fibers.

An odd number of crossovers (preferably one) must be

!maintained between devices so that the transmit port of one

CAUTION	device is connected to the receive port of the other device and
	vice versa.
	If the fiber optic cable being used has SC style connectors that
	do not resemble MIC style connectors, or has SC connectors
	on one end and a different type on the other, such as ST
	connectors, ensure that the proper crossing over occurs.

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