Ref: 11640095
Title: Transceiver (Drop) Cable Pinouts
Date: 12/13/90

Copyright 3Com Corporation, 1991.  All rights reserved.

Following are pinouts for a transceiver cable, also known as a drop cable
or AUI cable:


 Pin #  IEEE 802.3                      Ethernet version 1 & 2
--------------------------------------------------------------
   1    no connect                    * shield
   2    collision presence +            collision presence +
   3    transmit +                      transmit +
   4    receive shield                  no connect
   5    receive +                       receive +
   6    power return                    power return
   7    control out + (unsupported)     no connect
   8    no connect                      no connect
   9    collision presence -            collision presence -
  10    transmit -                      transmit -
  11    no connect                      no connect
  12    receive -                       receive -
  13 ** power                        ** power
  14    no connect                      no connect
  15    chassis ground                  no connect
       (overall shield)

* The electrostatic shield must be attached to pin 1 as well as to the
connector shell, and must not be connected to any other pin.  NO connections
are allowed on "no connect" pins.

** Current should not exceed 500mA.

