MicroMMAC Installation Guide
Page B-1
APPENDIX B
EPIM SPECIFICATIONS
EPIMs allow the MicroMMAC to attach to the main network using a
variety of media types. Cabletron Systems offers a variety of EPIMs. The
following sections provide specifications for each EPIM.
B.1 EPIM-T
The EPIM-T is an RJ45 connector that supports unshielded twisted pair
cabling. It has an internal Cabletron Systems TPT 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 B-1 shows the pinouts for the EPIM-T in both positions.
Figure B-1
Crossover Switch on the EPIM-T
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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