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       # CTC UNION TECHNOLOGIES CO., LTD.
       
          G.703 FE1 (FRACTIONAL E1/E1)
       
          Card Type        E1 DSU                                        
          Chip Set         Unidentified                                  
          I/O Options      E1 network interface via BNC-T connectors     
                           (2),                                          
                                                                         
                           25-pin DTE/DCE port, G.703 interface via      
                           RJ-45 connector                               
          Wiring Type      RG-58A/U cable                                
          E1 Transfer Rate 2.048Mbps                                     
          E1 Line Coding   HDB3                                          
          Frame type       G.703                                         
          Data Bus         External                                      
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function         | Label |     Function     | Label |
          |-------------------------+-------+------------------+-------|
          | 25-pin data port        |  CN1  | RG-58A/U         |  CN4  |
          |                         |       | connector -      |       |
          |                         |       | receive (BNC-T)  |       |
          |-------------------------+-------+------------------+-------|
          | RG-58A/U connector -    |  CN2  | Power switch     |  SW8  |
          | transmit (BNC-T)        |       |                  |       |
          |-------------------------+-------+------------------+-------|
          | G.703 interface(RJ-45)  |  CN3  |                  |       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |                Setting                 | Label | Position  |
          |----------------------------------------+-------+-----------|
          | Framed mode (2048Kbps)                 | SW2/1 |    On     |
          |----------------------------------------+-------+-----------|
          | Unframed mode(64Kbps x n )             | SW2/1 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 1 enabled                    | SW2/2 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 1 disabled                   | SW2/2 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 2 enabled                    | SW2/3 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 2 disabled                   | SW2/3 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 3 enabled                    | SW2/4 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 3 disabled                   | SW2/4 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 4 enabled                    | SW2/5 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 4 disabled                   | SW2/5 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 5 enabled                    | SW2/6 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 5 disabled                   | SW2/6 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 6 enabled                    | SW2/7 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 6 disabled                   | SW2/7 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 7 enabled                    | SW2/8 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 7 disabled                   | SW2/8 |    Off    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             USER CONFIGURABLE SETTINGS (CONT.)             |
          |------------------------------------------------------------|
          | Time slot 8 enabled                    | SW3/1 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 8 disabled                   | SW3/1 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 9 enabled                    | SW3/2 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 9 disabled                   | SW3/2 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 10 enabled                   | SW3/3 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 10 disabled                  | SW3/3 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 11 enabled                   | SW3/4 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 11 disabled                  | SW3/4 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 12 enabled                   | SW3/5 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 12 disabled                  | SW3/5 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 13 enabled                   | SW3/6 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 13 disabled                  | SW3/6 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 14 enabled                   | SW3/7 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 14 disabled                  | SW3/7 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 15 enabled                   | SW3/8 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 15 disabled                  | SW3/8 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 16 enabled                   | SW4/1 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 16 disabled                  | SW4/1 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 17 enabled                   | SW4/2 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 17 disabled                  | SW4/2 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 18 enabled                   | SW4/3 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 18 disabled                  | SW4/3 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 19 enabled                   | SW4/4 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 19 disabled                  | SW4/4 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 20 enabled                   | SW4/5 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 20 disabled                  | SW4/5 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 21 enabled                   | SW4/6 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 21 disabled                  | SW4/6 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 22 enabled                   | SW4/7 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 22 disabled                  | SW4/7 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 23 enabled                   | SW4/8 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 23 disabled                  | SW4/8 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 24 enabled                   | SW5/1 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 24 disabled                  | SW5/1 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 25 enabled                   | SW5/2 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 25 disabled                  | SW5/2 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 26 enabled                   | SW5/3 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 26 disabled                  | SW5/3 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 27 enabled                   | SW5/4 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 27 disabled                  | SW5/4 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 28 enabled                   | SW5/5 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 28 disabled                  | SW5/5 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 29 enabled                   | SW5/6 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 29 disabled                  | SW5/6 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 30 enabled                   | SW5/7 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 30 disabled                  | SW5/7 |    Off    |
          |----------------------------------------+-------+-----------|
          | Time slot 31 enabled                   | SW5/8 |    On     |
          |----------------------------------------+-------+-----------|
          | Time slot 31 disabled                  | SW5/8 |    Off    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             USER CONFIGURABLE SETTINGS (CONT.)             |
          |------------------------------------------------------------|
          | Inverted receive clock polarity enabled  | SW6/3 |   On    |
          |------------------------------------------+-------+---------|
          | Normal receive clock polarity enabled    | SW6/3 |   Off   |
          |------------------------------------------+-------+---------|
          | Inverted transmit clock polarity enabled | SW6/4 |   On    |
          |------------------------------------------+-------+---------|
          | Normal transmit clock polarity enabled   | SW6/4 |   Off   |
          |------------------------------------------+-------+---------|
          | CRC4 enabled                             | SW6/5 |   On    |
          |------------------------------------------+-------+---------|
          | CRC4 disabled                            | SW6/5 |   Off   |
          |------------------------------------------+-------+---------|
          | CAS/PCM31 mode                           | SW6/6 |   On    |
          |------------------------------------------+-------+---------|
          | CAS/PCM30 mode                           | SW6/6 |   Off   |
          |------------------------------------------+-------+---------|
          | Unused timslot - FLAG(7E)                | SW6/7 |   On    |
          |------------------------------------------+-------+---------|
          | Unused timeslot - MARK(FF)               | SW6/7 |   Off   |
          |------------------------------------------+-------+---------|
          | Data port in DTE mode                    | SW6/8 |   On    |
          |------------------------------------------+-------+---------|
          | Data port in DCE mode                    | SW6/8 |   Off   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     E1 LINE IMPEDANCE                      |
          |------------------------------------------------------------|
          |      Setting       | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 |
          |--------------------+-------+-------+-------+-------+-------|
          |  75 Ohm operation  |  Off  |  Off  |  Off  |  Off  |  Off  |
          |   (CE approved)    |       |       |       |       |       |
          |--------------------+-------+-------+-------+-------+-------|
          | 120 Ohm operation  |  On   |  On   |  On   |  On   |  On   |
          |   (CE approved)    |       |       |       |       |       |
          |--------------------+-------+-------+-------+-------+-------|
          |  75 Ohm operation  |  On   |  On   |  Off  |  Off  |  Off  |
          |   (older models)   |       |       |       |       |       |
          |--------------------+-------+-------+-------+-------+-------|
          | 120 Ohm operation  |  Off  |  Off  |  On   |  On   |  On   |
          |   (older models)   |       |       |       |       |       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        RX/TX TIMING                        |
          |------------------------------------------------------------|
          |    Receive Timing    |   Transmit Timing   | SW6/1 | SW6/2 |
          |----------------------+---------------------+-------+-------|
          |   Recover from E1    |  Source from data   |  Off  |  Off  |
          |     network port     |        port         |       |       |
          |----------------------+---------------------+-------+-------|
          |   Source from data   |  Source from data   |  Off  |  On   |
          |         port         |        port         |       |       |
          |----------------------+---------------------+-------+-------|
          |   Recover from E1    |   Source from E1    |  On   |  Off  |
          |     network port     |    network port     |       |       |
          |----------------------+---------------------+-------+-------|
          |    Established by    |   Established by    |  On   |  On   |
          | internal oscillator  | internal oscillator |       |       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   LOOPBACK TEST SELECTOR                   |
          |------------------------------------------------------------|
          |                Function                 | Label | Position |
          |-----------------------------------------+-------+----------|
          |    Recovery port loopback initiated     |  SW7  |    1     |
          |-----------------------------------------+-------+----------|
          |     Normal operation. Loopback not      |  SW7  |    2     |
          |                activated                |       |          |
          |-----------------------------------------+-------+----------|
          |      Data port loopback initiated       |  SW7  |    3     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED  | Color  | Status |             Condition             |
          |------+--------+--------+-----------------------------------|
          | DTE  | Green  |   On   |   DTE mode enabled; power is on   |
          |------+--------+--------+-----------------------------------|
          | DTE  | Green  |  Off   |  Device not in DTE mode or power  |
          |      |        |        |              is off               |
          |------+--------+--------+-----------------------------------|
          | DCE  | Green  |   On   |   DCE mode enabled; power is on   |
          |------+--------+--------+-----------------------------------|
          | DCE  | Green  |  Off   |  Device not in DCE mode or power  |
          |      |        |        |              is off               |
          |------+--------+--------+-----------------------------------|
          |  TD  | Yellow |   On   |  Data is being transmitted from   |
          |      |        |        |        the data port (CN1)        |
          |------+--------+--------+-----------------------------------|
          |  TD  | Yellow |  Off   |   Data is not being transmitted   |
          |      |        |        |     from the data port (CN1)      |
          |------+--------+--------+-----------------------------------|
          |  RD  | Yellow |   On   |   Data is being received at the   |
          |      |        |        |          data port (CN1)          |
          |------+--------+--------+-----------------------------------|
          |  RD  | Yellow |  Off   | Data is not being recieved at the |
          |      |        |        |          data port (CN1)          |
          |------+--------+--------+-----------------------------------|
          | TST  |  Red   |   On   |  Device is conducting a loopback  |
          |      |        |        |               test                |
          |------+--------+--------+-----------------------------------|
          | TST  |  Red   |  Off   |    Device is not conducting a     |
          |      |        |        |           loopback test           |
          |------+--------+--------+-----------------------------------|
          | ALM  |  Red   |   On   |    Alarm condition detected on    |
          |      |        |        |              network              |
          |------+--------+--------+-----------------------------------|
          | ALM  |  Red   |  Off   |  Alarm condition not detected on  |
          |      |        |        |              network              |
          |------+--------+--------+-----------------------------------|
          | TXCL |  Red   |   On   |   Transmit clock loss detected    |
          |------+--------+--------+-----------------------------------|
          | TXCL |  Red   |  Off   | Transmit clock loss not detected  |
          |------+--------+--------+-----------------------------------|
          | RXSL |  Red   |   On   |   Receive signal loss detected    |
          |------+--------+--------+-----------------------------------|
          | RXSL |  Red   |  Off   | Receive signal loss not detected  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               MISCELLANEOUS TECHNICAL NOTES                |
          |------------------------------------------------------------|
          | Timeslot switches are ignored in unframe mode. In framed   |
          | mode, clock rate is determined by the number of timeslots  |
          | enabled ( n ). In CAS mode, SW4/1 must be set to off       |
          | position or a loopback test will occur.                    |
          +------------------------------------------------------------+