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2. Check that the LNK LED on the TPIM lights green. If the LED is red 

or is not lighted, perform each of the following steps:

a.

Check that the device at the other end of the segment has power.

b.

Verify that the DB9 connector is pinned properly.

c.

Check that the twisted pair connection meets dB loss limits and 
cable specifications outlined in Chapter 2.

d. Check that the port is enabled through the Local Management.

e.

If a link still cannot be established, contact Cabletron Systems 
Technical Support.

The TPIM-T2 supports UTP cabling and the TPIM-T4 supports STP 
cabling. Both devices use the same method for connecting an RJ45 
connector to an RJ45 port. Before connecting a segment to the TPIM-T2 
/T4, check each end of the segment to ensure the wires are pinned properly. 

1. Insert the RJ45 connector on the twisted pair segment into the RJ45 

port on the TPIM as shown in Figure 3-16.

6

5

4

3

2

1

18

17

16

15

14

13

RI

TPIM-T1

LNK