Cabletron Systems SEH-22 - Manual (Page 45)

SEH USER’S GUIDE A-1
APPENDIX A
EPIM INFORMATION
A.1 EPIM SPECIFICATIONS
EPIMs enable the connection of the SEH to the main network using
different media types. Cabletron Systems offers a variety of EPIMs. The
following sections explain specifications for each EPIM.
A.1.1 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 cross-over 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 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
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SEH Book Page 1 Tuesday, March 19, 1996 4:12 PM