Chapter 3: Installation3-86E123-50 and 6E133-49 User’s Guide5. Verify that a link exists by checking that the port Link LEDs are on(solid green). If the Link LEDs are off, perform the following stepsuntil they are on:a. Verify that the 10BASE-T device at the other end of the twistedpair segment is ON and connected to the segment.b. Verify that the RJ21 connectors on the twisted pair segment havethe proper pinouts and check the cable for continuity.c. Check that the twisted pair connection meets the dB loss and cablespecifications outlined in Chapter 2.If a link is not established, contact Cabletron Systems Global Call Center.Refer to Section 1.7 for details.6. Repeat steps 1 through 4, above, until all connections have been made.3.5.2 Connecting a Twisted Pair Segmentto the FE-100TXAn FE-100-TX installed in port 5 and/or 6 has an internal crossoverswitch. When connecting a workstation, use a straight-through cable andset the Fast Ethernet Interface Module crossover switch shown inFigure 3-4 to the crossed over position marked with X. When connectingnetworking devices, such as another bridge, repeater, or router, use astraight-through cable and set the Fast Ethernet Interface Modulecrossover switch shown in Figure 3-4 to the straight-through position,marked with =.If the wires do not cross over, use the switch on the FE-100TX tointernally cross over the RJ45 port. Figure 3-4 shows how to properly setthe FE-100TX crossover switch.Figure 3-4 FE-100TX Crossover SwitchPosition X(crossed over)1. RX+2. RX-3. TX+4. NC5. NC6. TX-7. NC8. NCPosition =(not crossed over)1. TX+2. TX-3. RX+4. NC5. NC6. RX-7. NC8. NCFE-100TX1016651_05100=x
