Cabletron Systems NBR-220, NBR-420, NBR-620 manual Connecting The Nbr To The Network

Connecting the NBR to the Network

3.5 CONNECTING THE NBR TO THE NETWORK

This section gives procedures for connecting the NBR to the network using the various EPIMs available.

Once you have successfully powered up your NBR, you can add network connections. The procedure for connecting Ethernet segments to a hub varies depending on the media and ports you connect. Refer to the following list and perform the procedure described in the subsection(s) that apply to your hub:

EPIM-T3.5.1

EPIM-X3.5.2

EPIM-F1, F2, F3 3.5.3

EPIM-C3.5.4

EPIM-A3.5.5

3.5.1 Connecting a Twisted Pair Segment to an EPIM-T

Before connecting a segment to the EPIM-T, check each end of the segment to determine wire crossover. If the wires do not cross over, use the switch on the EPIM-T to internally cross over the RJ45 port. Refer to Figure 3-12 to properly set the EPIM-T crossover switch.

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		1092_14

Figure 3-12 EPIM-T Crossover Switch

NBR-SERIES Installation Guide Page 3-17