User's Manual

CSX400 and CSX400-DC User’s Guide 217
A EPIM Specifications
Introduction
The CSX400 provides two ports for Cabletron Systems EPIMs. EPIMs allow connection to the
main network using different media types. The following sections explain the specifications of the
variety of EPIMs Cabletron Systems offers.
EPIM-T
The EPIM-T is an RJ45 connector supporting UTP cabling. It has an internal Cabletron Systems
TPT-T 10BASE-T Twisted Pair Transceiver.
The slide switch on the EPIM-T determines the crossover status of the cable pairs. If the switch is
on the X side, the pairs are internally crossed over. If the switch is on the = side, the pairs are not
internally crossed over. Figure 78 shows the pinouts for the EPIM-T in both crossover positions.
Figure 78 EPIM-T Pinouts
Position =
(not crossed over)
1. TX+
2. TX-
3. RX+
4. NC
5. NC
6. RX-
7. NC
8. NC
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC
5. NC
6. TX-
7. NC
8. NC