Cabletron Systems SEH-22 - Manual (Page 50)

APPENDIX A: EPIM INFORMATION
A-6 SEH USER’S GUIDE
A.1.5 EPIM-A and EPIM-X (AUI Port)
The EPIM-A is a DB15 female connector used to attach segments to an
external transceiver. The EPIM-X is equipped with dual internal
transceivers. It has a DB15 male connector used to attach segments to an
AUI cable. Figure A-5 shows both modules.
Figure A-5. The EPIM-A and EPIM-X
DB15 Pinouts
Pin 1 Logic Ref. 9 Collision -
2 Collision + 10 Transmit -
3 Transmit + 11 Logic Ref.
4 Logic Ref. 12 Receive -
5 Receive + 13 Power (+12Vdc)
6 Power Return 14 Logic Ref.
7 No Connection 15 No Connection
8 Logic Ref.
Connector Shell: Protective Ground