DIGITAL COMMUNICATIONS ASSOCIATES, INC.

MACIRMATRAC

NIC Type      Token Ring
Transfer Rate 4/16Mbps
Data Bus      Apple NuBus
Topology      Token ring
Wiring Type   Unshielded twisted pair

              Shielded twisted pair via DB9

              Fiber optic cable
Boot ROM      Available

[Image]

                   CONNECTIONS

        Function                 Location

  Ring Interface Module            CN1

[Image]

         CONNECTIONS

   Function       Location

  Mother card       CN1

                                CABLE TYPE

       Type            JP1A          JP1B          JP2A          JP2B

     Shielded       Pins 1 & 2    Pins 1 & 2    Pins 1 & 2    Pins 1 & 2
   twisted pair       closed        closed        closed        closed

    Unshielded      Pins 2 & 3    Pins 2 & 3    Pins 2 & 3    Pins 2 & 3
   twisted pair       closed        closed        closed        closed

[Image]

         CONNECTIONS

   Function       Location

  Mother card       CN1

                      CABLE TYPE

           Type                       JP1

   Shielded twisted pair       Pins 1 & 2 closed

  Unshielded twisted pair      Pins 2 & 3 closed

                            MISCELLANEOUS NOTES

  There are three other ring interface modules available: fiber optic,
  4Mbps STP only software configurable, and 4/16Mbps STP only software
  configurable. These additional modules have no hardware configurable
  options, and are therefore not illustrated. Connections between the
  ring interface module and the mother card are identical for every
  version of module.