Cabletron Systems Environmental Module TM 9C300-1 - Manual (Page 39)

A-1
Appendix A
EPIM Specifications
Introduction
The 9C300-1 Environmental Module provides a port for Cabletron Systems
EPIMs. EPIMs let you connect to the main network using different media types.
Cabletron Systems offers a variety of EPIMs whose specifications are explained in
the following sections.
EPIM-T
The EPIM-T is an RJ-45 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 A-1 shows the
pinouts for the EPIM-T in both crossover positions.
Figure A-1. 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