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       # CTC UNION TECHNOLOGIES CO., LTD.
       
          ETU01/V35
       
          Card Type        E1 DSU                                        
          Chip Set         Unidentified                                  
          I/O Options      AC power, E1 network interface via BNC        
                           connectors (2),                               
                                                                         
                           E1 network interface via 15-pin connector,    
                                                                         
                           E1 network interface via bantam connectors    
                           (2), 34-pin DTE port (V.35)                   
          Wiring Type      RG-58A/U cable                                
          E1 Transfer Rate 2.048Mbps                                     
          E1 Line Coding   AMI, HDB3                                     
          Frame type       CCS, CAS, CRC4                                
          Data Bus         External                                      
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |     Function     | Label  |       Function        | Label  |
          |------------------+--------+-----------------------+--------|
          | AC power         |  CN1   | BNC connector -       |  CN5   |
          |                  |        | receive               |        |
          |------------------+--------+-----------------------+--------|
          | Bantam jack -    |  CN2   | BNC connector -       |  CN6   |
          | receive          |        | transmit              |        |
          |------------------+--------+-----------------------+--------|
          | Bantam jack -    |  CN3   | 15 pin-network port   |  CN7   |
          | transmit         |        |                       |        |
          |------------------+--------+-----------------------+--------|
          | V.35 DTE port    |  CN4   | Power switch          |  SW8   |
          |------------------------------------------------------------|
          | Note: RS-449 interface is possible via 37-pin connector on |
          | adapter cable                                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |                Setting                 | Label | Position  |
          |----------------------------------------+-------+-----------|
          | » | Framed mode (2048Kbps)             | SW1/1 |    On     |
          |---+------------------------------------+-------+-----------|
          |   | Unframed mode(64Kbps x n )         | SW1/1 |    Off    |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 1 enabled                | SW1/2 |    On     |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 1 disabled               | SW1/2 |    Off    |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 2 enabled                | SW1/3 |    On     |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 2 disabled               | SW1/3 |    Off    |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 3 enabled                | SW1/4 |    On     |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 3 disabled               | SW1/4 |    Off    |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 4 enabled                | SW1/5 |    On     |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 4 disabled               | SW1/5 |    Off    |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 5 disabled               | SW1/6 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 5 enabled                | SW1/6 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 6 disabled               | SW1/7 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 6 enabled                | SW1/7 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 7 disabled               | SW1/8 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 7 enabled                | SW1/8 |    On     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             USER CONFIGURABLE SETTINGS (CONT.)             |
          |------------------------------------------------------------|
          | » Time slot 8 disabled                 | SW2/1 |    Off    |
          |----------------------------------------+-------+-----------|
          |   | Time slot 8 enabled                | SW2/1 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 9 disabled               | SW2/2 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 9 enabled                | SW2/2 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 10 disabled              | SW2/3 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 10 enabled               | SW2/3 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 11 disabled              | SW2/4 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 11 enabled               | SW2/4 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 12 disabled              | SW2/5 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 12 enabled               | SW2/5 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 13 disabled              | SW2/6 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 13 enabled               | SW2/6 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 14 disabled              | SW2/7 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 14 enabled               | SW2/7 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 15 disabled              | SW2/8 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 15 enabled               | SW2/8 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 16 disabled              | SW3/1 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 16 enabled               | SW3/1 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 17 disabled              | SW3/2 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 17 enabled               | SW3/2 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 18 disabled              | SW3/3 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 18 enabled               | SW3/3 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 19 disabled              | SW3/4 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 19 enabled               | SW3/4 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 20 disabled              | SW3/5 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 20 enabled               | SW3/5 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 21 disabled              | SW3/6 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 21 enabled               | SW3/6 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 22 disabled              | SW3/7 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 22 enabled               | SW3/7 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 23 disabled              | SW3/8 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 23 enabled               | SW3/8 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 24 disabled              | SW4/1 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 24 enabled               | SW4/1 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 25 disabled              | SW4/2 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 25 enabled               | SW4/2 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 26 disabled              | SW4/3 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 26 enabled               | SW4/3 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 27 disabled              | SW4/4 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 27 enabled               | SW4/4 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 28 disabled              | SW4/5 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 28 enabled               | SW4/5 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 29 disabled              | SW4/6 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 29 enabled               | SW4/6 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 30 disabled              | SW4/7 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 30 enabled               | SW4/7 |    On     |
          |---+------------------------------------+-------+-----------|
          | » | Time slot 31 disabled              | SW4/8 |    Off    |
          |---+------------------------------------+-------+-----------|
          |   | Time slot 31 enabled               | SW4/8 |    On     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             USER CONFIGURABLE SETTINGS (CONT.)             |
          |------------------------------------------------------------|
          | » HDB3 line code enabled            | SW5/4 |     Off      |
          |-------------------------------------+-------+--------------|
          |   | AMI line code enabled           | SW5/4 |      On      |
          |---+---------------------------------+-------+--------------|
          | » | CAS/PCM31 frame mode enabled    | SW5/5 |     Off      |
          |---+---------------------------------+-------+--------------|
          |   | CAS/PCM30 frame mode enabled    | SW5/5 |      On      |
          |---+---------------------------------+-------+--------------|
          | » | CRC4 diabled                    | SW5/6 |     Off      |
          |---+---------------------------------+-------+--------------|
          |   | CRC4 enabled                    | SW5/6 |      On      |
          |---+---------------------------------+-------+--------------|
          | » | Unused timslot - Flag (0x7E)    | SW5/7 |     Off      |
          |---+---------------------------------+-------+--------------|
          |   | Unused timeslot - Mark (0xFF)   | SW5/7 |      On      |
          |---+---------------------------------+-------+--------------|
          | » | 64Kbps x n data rate enabled    | SW5/8 |     Off      |
          |---+---------------------------------+-------+--------------|
          |   | 56Kbps x n data rate enabled    | SW5/8 |      On      |
          |---+---------------------------------+-------+--------------|
          | » | Jitter attenuator enabled       | SW6/1 |      On      |
          |---+---------------------------------+-------+--------------|
          |   | Jitter attenuator disabled      | SW6/1 |     Off      |
          |---+---------------------------------+-------+--------------|
          | » | Jitter on received side         | SW6/2 |     Off      |
          |---+---------------------------------+-------+--------------|
          |   | Jitter on transmitted side      | SW6/2 |      On      |
          |---+---------------------------------+-------+--------------|
          | » | Jitter buffer depth set at 32   | SW6/3 |     Off      |
          |   | bits                            |       |              |
          |---+---------------------------------+-------+--------------|
          |   | Jitter buffer depth set at 128  | SW6/3 |      On      |
          |   | bits                            |       |              |
          |---+---------------------------------+-------+--------------|
          | » | Cascading function disabled     | SW6/4 |     Off      |
          |---+---------------------------------+-------+--------------|
          |   | Cascading function enabled      | SW6/4 |      On      |
          |---+---------------------------------+-------+--------------|
          | » | Passthrough disabled on time    | SW6/5 |     Off      |
          |   | slot 16                         |       |              |
          |---+---------------------------------+-------+--------------|
          |   | Passthrough enabled on time     | SW6/5 |      On      |
          |   | slot 16                         |       |              |
          |---+---------------------------------+-------+--------------|
          | » | Factory configured - do not     | SW6/6 | Unidentified |
          |   | alter                           |       |              |
          |---+---------------------------------+-------+--------------|
          | » | Data port loopback disabled     | SW6/7 |     Off      |
          |---+---------------------------------+-------+--------------|
          |   | Data port loopback enabled      | SW6/7 |      On      |
          |---+---------------------------------+-------+--------------|
          | » | Front panel loopback enabled    | SW6/8 |      On      |
          |---+---------------------------------+-------+--------------|
          |   | Front panel loopback disabled   | SW6/8 |     Off      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CLOCK MODE                         |
          |------------------------------------------------------------|
          |  Mode #  |   E1    |Data Port| Data Port |SW5/1|SW5/2|SW5/3|
          |          |Transmit | Receive | Transmit  |     |     |     |
          |----------+---------+---------+-----------+-----+-----+-----|
          |»|0 (DCE1)| Recover | Recover |  Recover  | Off | Off | Off |
          |-+--------+---------+---------+-----------+-----+-----+-----|
          | |1 (DCE2)|Internal |Internal | Internal  | On  | Off | Off |
          |-+--------+---------+---------+-----------+-----+-----+-----|
          | |2 (DTE1)|External | Recover | External  | Off | On  | Off |
          |-+--------+---------+---------+-----------+-----+-----+-----|
          | |3 (DTE2)|External |External | External  | On  | On  | Off |
          |-+--------+---------+---------+-----------+-----+-----+-----|
          | |4 (DTE2)|External |External | External  | Off | Off | On  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     E1 LINE IMPEDANCE                      |
          |------------------------------------------------------------|
          |      Setting       | SW7/1 | SW7/2 | SW7/3 | SW7/4 | SW7/5 |
          |--------------------+-------+-------+-------+-------+-------|
          | » |     75 Ohm     |  Off  |  Off  |  Off  |  Off  |  Off  |
          |   |   operation    |       |       |       |       |       |
          |---+----------------+-------+-------+-------+-------+-------|
          |   |    120 Ohm     |  On   |  On   |  On   |  On   |  On   |
          |   |   operation    |       |       |       |       |       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED  | Color  |  Status  |            Condition            |
          |------+--------+----------+---------------------------------|
          | PWR  | Green  |    On    |           Power is on           |
          |------+--------+----------+---------------------------------|
          | PWR  | Green  |   Off    |          Power is off           |
          |------+--------+----------+---------------------------------|
          |  TD  | Yellow |    On    | Data is being transmitted from  |
          |      |        |          |       the data port (CN4)       |
          |------+--------+----------+---------------------------------|
          |  TD  | Yellow | Blinking | Space is being transmitted from |
          |      |        |          |       the data port (CN4)       |
          |------+--------+----------+---------------------------------|
          |  TD  | Yellow |   Off    |  Data is not being transmitted  |
          |      |        |          |    from the data port (CN4)     |
          |------+--------+----------+---------------------------------|
          |  RD  | Yellow |    On    |  Data is being received at the  |
          |      |        |          |         data port (CN4)         |
          |------+--------+----------+---------------------------------|
          |  RD  | Yellow | Blinking | Space is being received at the  |
          |      |        |          |         data port (CN4)         |
          |------+--------+----------+---------------------------------|
          |  RD  | Yellow |   Off    |  Data is not being recieved at  |
          |      |        |          |       the data port (CN4)       |
          |------+--------+----------+---------------------------------|
          | RTS  | Yellow |    On    |    Sending device is enabled    |
          |------+--------+----------+---------------------------------|
          | RTS  | Yellow |   Off    |   Sending device is disabled    |
          |------+--------+----------+---------------------------------|
          | DCD  | Yellow |    On    |      Data carrier present       |
          |------+--------+----------+---------------------------------|
          | DCD  | Yellow |   Off    |    Data carrier not present.    |
          |      |        |          |   Connection not established    |
          |------+--------+----------+---------------------------------|
          | CKLS |  Red   |    On    |  Transmit clock loss detected   |
          |------+--------+----------+---------------------------------|
          | CKLS |  Red   |   Off    |     Transmit clock loss not     |
          |      |        |          |            detected             |
          |------+--------+----------+---------------------------------|
          | SGLS |  Red   |    On    |  Receive signal loss detected   |
          |------+--------+----------+---------------------------------|
          | SGLS |  Red   |   Off    |     Receive signal loss not     |
          |      |        |          |            detected             |
          |------+--------+----------+---------------------------------|
          | SCLS |  Red   |    On    |     Loss of received frame      |
          |      |        |          |     syncronization detected     |
          |------+--------+----------+---------------------------------|
          | SCLS |  Red   |   Off    |     Loss of received frame      |
          |      |        |          |   syncronization not detected   |
          |------+--------+----------+---------------------------------|
          | ALM  |  Red   |    On    |   Alarm condition detected on   |
          |      |        |          |             network             |
          |------+--------+----------+---------------------------------|
          | ALM  |  Red   |   Off    | Alarm condition not detected on |
          |      |        |          |             network             |
          |------+--------+----------+---------------------------------|
          |  ER  |  Red   |    On    | Bit errors detected in the 511  |
          |      |        |          |          test pattern           |
          |------+--------+----------+---------------------------------|
          |  ER  |  Red   |   Off    | Bits errors not detected in 511 |
          |      |        |          |          test pattern           |
          |------+--------+----------+---------------------------------|
          | TST  |  Red   |    On    | Device is conducting a loopback |
          |      |        |          |         or pattern test         |
          |------+--------+----------+---------------------------------|
          | TST  |  Red   |   Off    |   Device is not conducting a    |
          |      |        |          |    loopback or pattern test     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               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, SW3/1 must be set to off       |
          | position or a loopback test will occur. Cascading units    |
          | must not be assigned identical or overlapping timeslots.   |
          +------------------------------------------------------------+