Enterasys mrx Installation Instruction

Page 3-11

The X to the left of the RJ-45 port on the SPIM-T indicates that the
port is internally crossed over.  This eliminates the need to cross over
the twisted pair segment attached to the SPIM-T port.  To connect a
SPIM-T to a Twisted Pair Segment:

1.

Connect the twisted pair segment (see Figure 3-9) to the module
by inserting the RJ-45 connector on the twisted pair segment into
the RJ-45 port on the module.

Figure 3-9.  Connecting a Twisted Pair Segment to a SPIM-T

2.

Check that the LNK LED for the port is lit.  If the LED is not lit,
perform each of the following steps until it is:

a.

Check that the 10BASE-T device at the other end of the
twisted pair segment is powered up.

b.

Verify that the RJ-45 connector on the twisted pair segment
has the proper pinouts (see Figure 3-10).

c.

Check the cable for continuity.

d.

Check that the twisted pair connection meets dB loss and
cable specifications outlined in 10BASE-T Twisted Pair
Network Requirements.

SPIM-T

SP

X