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       # 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                                     
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |           Function            |          Location          |
          |-------------------------------+----------------------------|
          | Ring Interface Module         |            CN1             |
          +------------------------------------------------------------+
       
 (IMG) IMG 2
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |           Function            |          Location          |
          |-------------------------------+----------------------------|
          | Mother card                   |            CN1             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CABLE TYPE                         |
          |------------------------------------------------------------|
          |     Type     |   JP1A    |   JP1B    |   JP2A   |   JP2B   |
          |--------------+-----------+-----------+----------+----------|
          |   Shielded   | Pins 1 &  | Pins 1 &  | Pins 1 & | Pins 1 & |
          | twisted pair | 2 closed  | 2 closed  | 2 closed | 2 closed |
          |--------------+-----------+-----------+----------+----------|
          |  Unshielded  | Pins 2 &  | Pins 2 &  | Pins 2 & | Pins 2 & |
          | twisted pair | 3 closed  | 3 closed  | 3 closed | 3 closed |
          +------------------------------------------------------------+
       
 (IMG) IMG 3
          
       
          +------------------------------------------------------------+
          |                        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.                                   |
          +------------------------------------------------------------+