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       # 3COM CORPORATION
       
          ETHERLINK 16 TP (3C507-TP)
       
          NIC Type         Ethernet                                      
          Transfer Rate    10Mbps                                        
          Data Bus         16-bit ISA                                    
          Topology         Star                                          
          Wiring Type      Unshielded twisted pair                       
          Boot ROM         Available                                     
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |       10BASE-T STANDARD COMPATIBILITY CONFIGURATION        |
          |------------------------------------------------------------|
          |               Setting               |  Jumper  |  Setting  |
          |-------------------------------------+----------+-----------|
          | » | DC signal disabled 2            |    J1    | Pins 2 &  |
          |   |                                 |          | 3 closed  |
          |---+---------------------------------+----------+-----------|
          |   | DC signal enabled (On receive   |    J1    | Pins 1 &  |
          |   | wires) 3                        |          | 2 closed  |
          |---+---------------------------------+----------+-----------|
          | » | Link beat enabled               |    J2    | Pins 1 &  |
          |   |                                 |          | 2 closed  |
          |---+---------------------------------+----------+-----------|
          |   | Link beat disabled              |    J2    | Pins 2 &  |
          |   |                                 |          | 3 closed  |
          |---+---------------------------------+----------+-----------|
          | » | Receive threshold select normal |    J3    | Pins 1 &  |
          |   |                                 |          | 2 closed  |
          |---+---------------------------------+----------+-----------|
          |   | Receive threshold select low 1  |    J3    | Pins 2 &  |
          |   |                                 |          | 3 closed  |
          |---+---------------------------------+----------+-----------|
          | » | Equalization disabled 2         |    J4    | Pins 2 &  |
          |   |                                 |          | 3 closed  |
          |---+---------------------------------+----------+-----------|
          |   | Equalization enabled 3          |    J4    | Pins 1 &  |
          |   |                                 |          | 2 closed  |
          |---+---------------------------------+----------+-----------|
          | » | Transmit level select normal (± |    J6    | Pins 1 &  |
          |   | 5V)                             |          | 2 closed  |
          |---+---------------------------------+----------+-----------|
          |   | Transmit level select low (±    |    J6    | Pins 2 &  |
          |   | 2V)                             |          | 3 closed  |
          |---+---------------------------------+----------+-----------|
          | » | Cable Impedance select 100ohms  |    J7    | Pins 2 &  |
          |   |                                 |          | 3 closed  |
          |---+---------------------------------+----------+-----------|
          |   | Cable Impedance select 150ohms  |    J7    | Pins 3 &  |
          |   |                                 |          | 4 closed  |
          |---+---------------------------------+----------+-----------|
          |   | Cable Impedance select 75ohms   |    J7    | Pins 1 &  |
          |   |                                 |          | 2 closed  |
          |---+--------------------------------------------------------|
          |   | Note 1: Use this setting with the 3Com MultiConnect TP |
          |   | Module. Do not use this setting with the 3Com          |
          |   | LinkBuilder, or the SynOptics LattisNet Model 3308.    |
          |   |                                                        |
          |   | Note 2: This is the 10BASE-T standard and should be    |
          |   | used with all 10BASE-T standard hubs.                  |
          |   |                                                        |
          |   | Note 3: This setting is required when using any        |
          |   | Pre-10BASE-T SynOptics hub.                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |  LED  |  Color  |  Status   |          Condition           |
          |-------+---------+-----------+------------------------------|
          |  L1   | Yellow  | Blinking  | Data is being transmitted or |
          |       |         |           |           received           |
          |-------+---------+-----------+------------------------------|
          |  L1   | Yellow  |    Off    |      Data is not being       |
          |       |         |           |   transmitted or received    |
          |-------+---------+-----------+------------------------------|
          |  L2   |  Green  |    On     |     Twisted pair network     |
          |       |         |           |      connection is good      |
          |-------+---------+-----------+------------------------------|
          |  L2   |  Green  | Blinking  |  Twisted pair wire polarity  |
          |       |         |           |           reversed           |
          |-------+---------+-----------+------------------------------|
          |  L2   |  Green  |    Off    |     Twisted pair network     |
          |       |         |           |     connection is broken     |
          |------------------------------------------------------------|
          |   Note: Reversed polarity is automatically corrected for   |
          |   but this may impede performance. It is suggested that    |
          |   reversed polarity wires be corrected to attain maximum   |
          |   performance.                                             |
          +------------------------------------------------------------+