Chapter 3: Installation

b.Verify that the RJ21 connectors on the twisted pair segment have the proper pinouts and check the cable for continuity.

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 your DIGITAL representative.

6.Repeat steps 1 through 4, above, until all connections have been made.

3.5.3Connecting a Twisted Pair Segment to the

DELTX-UI

An DELTX-UI installed in port 25 and/or 26 has an internal crossover switch. When connecting a workstation, use a straight-through cable and set the Fast Ethernet Interface Module crossover switch shown in Figure 3-6 to the crossed over position marked with X. When connecting networking devices, such as another bridge, repeater, or router, use a straight-through cable and set the Fast Ethernet Interface Module crossover switch shown in Figure 3-6 to the not crossed over position, marked with =.

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

3-10 DLE22-MA, DLE32-MA, DLE23-MA and DLE33-MA User’s Guide

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Cabletron Systems DLE33-MA, DLE22-MA, DLE32-MA, DLE23-MA manual Connecting a Twisted Pair Segment to, Deltx-Ui