ALLIED TELESYN, INC.

AT-270

Card Type             Single Port Transceiver
NIC Type              Ethernet
Network Transfer Rate 10Mbps/CSMA/CD
Topology              Linear Bus
Wiring Type           AUI transceiver via DB-15 port
Data Bus              None

[Image]

                                CONNECTIONS

           Function             Label           Function            Label

  AUI transceiver via DB-15     CN1     BNC connector               CN3

  AUI transceiver via DB-15     CN2

                        USER CONFIGURABLE SETTINGS

                   Function                      Label       Position

  »   SQE/Heartbeat switch disabled               SW1            0

      SQE/Heartbeat switch enabled                SW1            1

                             DIAGNOSTIC LED(S)

      LED            Color        Status              Condition

    Power 1       Unidentified      On       Power for port 1 is present

    Power 1       Unidentified      Off       Power for port 1 is absent

    Power 2       Unidentified      On       Power for port 2 is present

    Power 2       Unidentified      Off       Power for port 2 is absent

    TRANSMIT      Unidentified      On        Data is being transmitted

    TRAMSMIT      Unidentified      Off            Data is not being
                                                     transmitted

    RECEIVE       Unidentified      On          Data is being received

    RECEIVE       Unidentified      Off       Data is not being received

   COLLISION      Unidentified      On           Collision detected on
                                                       network

    COLLSION      Unidentified      Off        No collision detected on
                                                       network

    SQE TEST      Unidentified      On              SQE is enabled

    SQE TEST      Unidentified      Off            SQE is disabled