Cabletron Systems SEHI-22FL manual Connecting a UTP Segment to an EPIM-T

Chapter 5: Connecting to the Network

5.1.2Connecting a UTP Segment to an EPIM-T

Before connecting a segment to the EPIM-T, check each end of the segment to determine if the wires cross over for proper connection. If the wires do not cross over, use the switch on the EPIM-T to internally cross over the RJ45 port. Figure 5-2 shows the pin assignment of the port according to the switch position.

Position X (crossed over)

1. RX+	5. NC
2. RX-	6. TX-
3. TX+	7. NC
4. NC	8. NC

Position =

(not crossed over)

1. TX+	5.	NC
2. TX-	6.	RX-
3. RX+	7. NC
4. NC	8. NC		1490_14

Figure 5-2 EPIM-T Crossover Switch

To connect an EPIM-T to a twisted pair segment:

1.Connect the segment to the module by inserting the RJ45 connector on the segment into the RJ45 port on the module. See Figure 5-2.

2.Check that the EPIM LNK LED is on. If the LED is off, perform each of the following steps until it is on:

a.Check that the device at the end of the 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.Check that the twisted pair connection meets dB loss and cable specifications outlined in Chapter 3, Section 3.1.3.

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

5-4 SEHI User’s Guide