PATTON ELECTRONICS COMPANY
==========================

   2450

   Card Type         CSU/DSU                                      
   Chip Set          Unidentified                                 
   I/O Options       Power, DTE/DCE serial port, network          
                     interface via RJ-48 connector                
   Maximum Data Rate 64Kbps                                       
   Data Bus          External                                     

<gopher://bitreich.org/I/th99/t/P-R/54950-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Function     | Label  |       Function        | Label  |
   |------------------+--------+-----------------------+--------|
   | Power connector  |  CN1   | Network interface via |  CN3   |
   |                  |        | RJ-48 connector       |        |
   |------------------+--------+-----------------------+--------|
   | DTE/DCE port     |  CN2   |                       |        |
   | (quick connect   |        |                       |        |
   | module)          |        |                       |        |
   |------------------------------------------------------------|
   | Note: Quick connect serial interface module can be         |
   | configured as a V.24/RS-232, V.35, RS422/530, or X.21      |
   | port.                                                      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                 Setting                 | Label | Position |
   |-----------------------------------------+-------+----------|
   |>> | Circuit assurance disabled.         | S1/3  |   Off    |
   |   | Transmitter and CTS will operate    |       |          |
   |   | independent of receiver state       |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Circuit assurance enabled. CTS will | S1/3  |    On    |
   |   | go low and the transmitter will be  |       |          |
   |   | held off if the receiver is in the  |       |          |
   |   | No signal state or CD is low        |       |          |
   |---+-------------------------------------+-------+----------|
   |>> | RTS forced high                     | S1/4  |    On    |
   |---+-------------------------------------+-------+----------|
   |   | RTS follows DTE signal              | S1/4  |   Off    |
   |---+-------------------------------------+-------+----------|
   |>> | 56Kbps mode                         | S1/5  |   Off    |
   |---+-------------------------------------+-------+----------|
   |   | 64Kbps mode                         | S1/5  |    On    |
   |---+-------------------------------------+-------+----------|
   |>> | Front panel switches enabled        | S1/6  |   Off    |
   |---+-------------------------------------+-------+----------|
   |   | Front panel switches disabled       | S1/6  |    On    |
   |---+-------------------------------------+-------+----------|
   |>> | Modem ignores loopback requests     | S1/7  |    On    |
   |   | from DTE                            |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Modem responds to local analog      | S1/7  |   Off    |
   |   | loopback requests from DTE          |       |          |
   |---+-------------------------------------+-------+----------|
   |>> | Modem ignores loopback requests     | S1/8  |    On    |
   |   | from remote                         |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Modem responds to loopback requests | S1/8  |   Off    |
   |   | from remote                         |       |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   TRANSMIT CLOCK SOURCE                    |
   |------------------------------------------------------------|
   |                    Source                    | S1/1 | S1/2 |
   |----------------------------------------------+------+------|
   |>> | Transmit clock derived from receive line | Off  |  On  |
   |   |     signal. Dedicated DDS operation      |      |      |
   |---+------------------------------------------+------+------|
   |   | Transmit clock derived from receive line |  On  |  On  |
   |   | signal. Allows remote device to initiate |      |      |
   |   |                loopback.                 |      |      |
   |---+------------------------------------------+------+------|
   |   |   Transmit clock generated internally    | Off  | Off  |
   |---+------------------------------------------+------+------|
   |   |   Transmit clock derived from terminal   |  On  | Off  |
   |   |                interface                 |      |      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   LOOPBACK TEST SELECTOR                   |
   |------------------------------------------------------------|
   |                Function                 | Label | Position |
   |-----------------------------------------+-------+----------|
   |    Remote digital loopback initiated    |  SW4  |    1     |
   |-----------------------------------------+-------+----------|
   |     Normal operation. Loopback not      |  SW4  |    2     |
   |                activated                |       |          |
   |-----------------------------------------+-------+----------|
   |     Activates local analog loopback     |  SW4  |    3     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   TEST PATTERN GENERATOR                   |
   |------------------------------------------------------------|
   |                Function                 | Label | Position |
   |-----------------------------------------+-------+----------|
   |     511/E test pattern transmitted      |  SW5  |    1     |
   |      (intentional errors inserted)      |       |          |
   |-----------------------------------------+-------+----------|
   |   Normal operation. Test pattern not    |  SW5  |    2     |
   |                activated                |       |          |
   |-----------------------------------------+-------+----------|
   |      511 test pattern transmitted       |  SW5  |    3     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED | Color | Status |              Condition              |
   |-----+-------+--------+-------------------------------------|
   | TD  |  Red  |   On   |   Data is being transmitted (low    |
   |     |       |        |      logic level, device idle)      |
   |-----+-------+--------+-------------------------------------|
   | TD  | Green |   On   |   Data is being transmitted (high   |
   |     |       |        |            logic level)             |
   |-----+-------+--------+-------------------------------------|
   | TD  | None  |  Off   |    Data is not being transmitted    |
   |-----+-------+--------+-------------------------------------|
   | RD  |  Red  |   On   |  Data is being received (low logic  |
   |     |       |        |         level, device idle)         |
   |-----+-------+--------+-------------------------------------|
   | RD  | Green |   On   | Data is being received (high logic  |
   |     |       |        |               level)                |
   |-----+-------+--------+-------------------------------------|
   | RD  | None  |  Off   |     Data is not being received      |
   |-----+-------+--------+-------------------------------------|
   | CD  | Green |   On   |       Carrier signal detected       |
   |-----+-------+--------+-------------------------------------|
   | CD  |  Red  |   On   |     Carrier signal not detected     |
   |-----+-------+--------+-------------------------------------|
   | NS  |  Red  |   On   |          No valid carrier           |
   |-----+-------+--------+-------------------------------------|
   | NS  |  Red  |  Off   |  Valid signal detected from remote  |
   |     |       |        |  modem or digital service provider  |
   |-----+-------+--------+-------------------------------------|
   | ER  |  Red  |   On   | Bit error likely in received signal |
   |     |       |        |    or error detected in the test    |
   |     |       |        |               pattern               |
   |-----+-------+--------+-------------------------------------|
   | ER  |  Red  |  Off   |         Error not detected          |
   |-----+-------+--------+-------------------------------------|
   | TM  |  Red  |   On   | Device has been placed in test mode |
   |     |       |        |       by local or remote user       |
   |-----+-------+--------+-------------------------------------|
   | TM  |  Red  |  Off   |   Device is not conducting a test   |
   +------------------------------------------------------------+