3-COM Etherlink II Board  (260-5501)    Install        Faxback Doc. # 5396

INCLUDED ITEMS

    >>  EtherLink
    >>  EtherLink Diagnostic Software
    >>  EtherLink Board Installation Guide
    >>  Accessories package containing:
           T-connector used to connect the board to the cable,
           Adaptor plate assembly used when installing standard
           Ethernet cable.
    >>  3Com Warranty Registration Card
        The full-size EtherLink board package includes a plastic
        guide to provide extra support for the EtherLink Plus board.

INSTALLING THE BOARD

Step 1:  Disconnect cables from the computer
Step 2:  Remove the main system unit cover
Step 3:  Install the Board Guide
Step 4:  Remove the expansion slot cover
Step 5:  Secure the board in the expansion slot.  Attach the network
         cable with the T-connector into the BNC connector on the
Step 6:  Replace the system unit cover
Step 7:  Reconnect cables and power

APPENDIX B:  MOVING THE TRANSCEIVER SELECT JUMPER

To use standard Ethernet cable, instead of Thin Ethernet cable, on an Ether-
Link or EtherLink Plus board, you must move the transceiver select jumper on
the board and install the Adaptor Plate (supplied with each board).  Standard
Ethernet cable requires an external transceiver.  The transceiver select
jumper is installed at the factory in the BNC location for Thin Ethernet
cable.  If you are using standard Ethernet cable, you must change the jumper
to the DNX location.

SELECTING THE EXTERNAL TRANSCEIVER

The transceiver select jumper consists of two 14-pin sockets and one 14-pin
plug.  To select the external transceiver for standard Ethernet cable, you
have to move the transceiver select jumper from the BNC socket to the socket
labeled DIX.  The preferred method is to insert the jumper with the notched
end toward the rear panel.

INSTALLING THE ADAPTER PLATE

1.  Slide the clips on the ends of the adapter plate and insert the screws
    into the clips.
2.  Align the slots in the plate with the indents in the lock posts on the
    transceiver cable and press the plate onto the connector.
3.  Plug the plate assembly into the connector on the EtherLink or EtherLink
    Plus board.  Tighten the screws on the adapter plate into the threaded
    jackposts on the board.

(CSS/jlc-03/28/94)