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       # PATTON ELECTRONICS COMPANY
       
          1140
       
          Modem Type               Data (synchronous/asynchronous)       
          Maximum Data Rate        38.4Kbps                              
          Data Bus                 External                              
          Data Modulation Protocol Proprietary                           
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |     Purpose      | Location |      Purpose      | Location |
          |------------------+----------+-------------------+----------|
          | Line out         |   CN1    | RS-232/422        |   CN3    |
          |------------------+----------+-------------------+----------|
          | Line in          |   CN2    |                   |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      CARRIER CONTROL                       |
          |------------------------------------------------------------|
          |            Setting            |           SW3/H            |
          |-------------------------------+----------------------------|
          | » Always on                   |            Off             |
          |-------------------------------+----------------------------|
          |          Follows RTS          |             On             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CLOCK SOURCE                        |
          |------------------------------------------------------------|
          |       Setting       |       SW3/E       |      SW3/F       |
          |---------------------+-------------------+------------------|
          | » Internal transmit |        On         |        On        |
          |---------------------+-------------------+------------------|
          |   Receive recover   |        Off        |        On        |
          |---------------------+-------------------+------------------|
          |  External transmit  |        On         |       Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               DATA RATE FLUCTUATION ALLOWED                |
          |------------------------------------------------------------|
          |            Setting            |           SW4/C            |
          |-------------------------------+----------------------------|
          |          -2.5% to 1%          |            Off             |
          |-------------------------------+----------------------------|
          | » -2.5% to 2.3%               |             On             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    LOOPBACK TEST SELECT                    |
          |------------------------------------------------------------|
          |            Setting            |            SW2             |
          |-------------------------------+----------------------------|
          |     Local analog loopback     |             1              |
          |-------------------------------+----------------------------|
          |       Normal operation        |             2              |
          |-------------------------------+----------------------------|
          |    Remote digital loopback    |             3              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                            MODE                            |
          |------------------------------------------------------------|
          |            Setting            |           SW3/G            |
          |-------------------------------+----------------------------|
          | » Asynchronous                |             On             |
          |-------------------------------+----------------------------|
          |          Synchronous          |            Off             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       RTS/CTS DELAY                        |
          |------------------------------------------------------------|
          |      Setting       |       SW4/D       |       SW4/E       |
          |--------------------+-------------------+-------------------|
          | » 7ms              |        On         |        On         |
          |--------------------+-------------------+-------------------|
          |        53ms        |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |      Disabled      |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |      Disabled      |        Off        |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                           SPEED                            |
          |------------------------------------------------------------|
          |  Setting   |   SW3/A   |   SW3/B   |   SW3/C   |   SW3/D   |
          |------------+-----------+-----------+-----------+-----------|
          |  1.2Kbps   |    On     |    On     |    On     |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |  1.8Kbps   |    Off    |    On     |    On     |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |  2.4Kbps   |    On     |    Off    |    On     |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |  3.6Kbps   |    Off    |    Off    |    On     |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |  4.8Kbps   |    On     |    On     |    Off    |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |  7.2Kbps   |    Off    |    On     |    Off    |    On     |
          |------------+-----------+-----------+-----------+-----------|
          | » 9.6Kbps  |    On     |    Off    |    Off    |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |  14.4Kbps  |    Off    |    Off    |    Off    |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |  19.2Kbps  |    On     |    On     |    On     |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |  28.8Kbps  |    Off    |    On     |    On     |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |  38.4Kbps  |    On     |    On     |    Off    |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |  57.6Kbps  |    Off    |    On     |    Off    |    Off    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        TEST SELECT                         |
          |------------------------------------------------------------|
          |            Setting            |            SW1             |
          |-------------------------------+----------------------------|
          |   Generate 511 test pattern   |             1              |
          |-------------------------------+----------------------------|
          |       Normal operation        |             2              |
          |-------------------------------+----------------------------|
          |  Generate 511E test pattern   |             3              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     V.54 LOOPBACK TEST                     |
          |------------------------------------------------------------|
          |            Setting            |           SW4/H            |
          |-------------------------------+----------------------------|
          | » Enabled                     |            Off             |
          |-------------------------------+----------------------------|
          |           Disabled            |             On             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        WORD LENGTH                         |
          |------------------------------------------------------------|
          |      Setting       |       SW4/A       |       SW4/B       |
          |--------------------+-------------------+-------------------|
          |       8 bit        |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |       9 bit        |        On         |        On         |
          |--------------------+-------------------+-------------------|
          | » 10 bit           |        Off        |        Off        |
          |--------------------+-------------------+-------------------|
          |       11 bit       |        On         |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                FACTORY CONFIGURED SETTINGS                 |
          |------------------------------------------------------------|
          |           Switch            |           Setting            |
          |-----------------------------+------------------------------|
          |            SW4/F            |           Not used           |
          |-----------------------------+------------------------------|
          |            SW4/G            |           Not used           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |  LED  | Color |  Status  |            Condition            |
          |-------+-------+----------+---------------------------------|
          | ERROR |  Red  | Blinking |   Errors detected during V.54   |
          |       |       |          |              test               |
          |-------+-------+----------+---------------------------------|
          | ERROR |  Red  |    On    |     Test pattern generator      |
          |       |       |          |           functional            |
          |-------+-------+----------+---------------------------------|
          | ERROR |  Red  |   Off    |        Normal operation         |
          |-------+-------+----------+---------------------------------|
          | TEST  |  Red  |    On    |  Local analog loopback test in  |
          |       |       |          |            progress             |
          |-------+-------+----------+---------------------------------|
          | TEST  |  Red  |   Off    |        Normal operation         |
          +------------------------------------------------------------+