RAD DATA COMMUNICATIONS
=======================

   FCD-2 (V.35)

   Card Type        E1 LTU                                        
   Chip Set         Unidentified                                  
   I/O Options      AC power connector, V.35 DTE port, serial     
                    port,                                         
                                                                  
                    E1 network interface via 15-pin connector,    
                    BNC connectors (2)                            
   E1 Transfer Rate 2.048Mbps                                     
   E1 Protocol      HDB3                                          
   Frame Type       CRC-4                                         
   Data Bus         External                                      

<gopher://bitreich.org/I/th99/t/P-R/54853-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function       | Label |      Function       | Label |
   |----------------------+-------+---------------------+-------|
   | AC power connector   |  CN1  | LTU board connector |  J3   |
   |----------------------+-------+---------------------+-------|
   | Serial port          |  CN2  | LTU board connector |  J4   |
   |----------------------+-------+---------------------+-------|
   | 34-pin V.35 DTE port |  CN3  | Power switch        |  SW2  |
   |----------------------+-------+---------------------+-------|
   | 15-pin E1 port       |  CN4  | BNC connector -     |  RX   |
   |                      |       | receive             |       |
   |----------------------+-------+---------------------+-------|
   | LTU board connector  |  J2   | BNC connector -     |  TX   |
   |                      |       | transmit            |       |
   |------------------------------------------------------------|
   | Note:                                                      |
   |                                                            |
   | Jumpers must be installed on pins 1&2 and 3&4 of           |
   | connectors J3 & J4 to maintain signal path continuity when |
   | the LTU board is removed.                                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Setting                | Label |  Position  |
   |---------------------------------------+-------+------------|
   |>> | Debug self test mode disabled     |  JP2  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Debug self test mode enabled      |  JP2  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Default password enabled.         |  JP3  | Pins 2 & 3 |
   |   | Password=FCD-12                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | User password enabled             |  JP3  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Watchdog timer enabled            |  JP4  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Watchdog timer disabled           |  JP4  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Signal ground is connected to the | JP12  | Pins 2 & 3 |
   |   | frame ground                      |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Signal ground is not connected to | JP12  | Pins 1 & 2 |
   |   | the frame ground                  |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Internal -5V enabled              | JP22  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Grounded to pin 15 in the main    | JP22  | Pins 2 & 3 |
   |   | link connector (CN4)              |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Transmit side ground reference    | JP23  |    Open    |
   |   | set for balanced interface        |       |            |
   |---+-----------------------------------+-------+------------|
   |   | Transmit side ground reference    | JP23  |   Closed   |
   |   | set for unbalanced interface      |       |            |
   |---+-----------------------------------+-------+------------|
   |>> | Frame ground is connected to main | JP24  |   Closed   |
   |   | link ground reference             |       |            |
   |---+-----------------------------------+-------+------------|
   |   | Frame ground is not connected to  | JP24  |    Open    |
   |   | main link ground reference        |       |            |
   |---+-----------------------------------+-------+------------|
   |>> | Allows connection of the line     | JP25  |   Closed   |
   |   | controlled by JP22 to pin 15 of   |       |            |
   |   | main link connector (CN4) for     |       |            |
   |   | powering external device          |       |            |
   |---+-----------------------------------+-------+------------|
   |   | Does not allow connection of the  | JP25  |    Open    |
   |   | line controlled by JP22 to pin 15 |       |            |
   |   | of main link connector (CN4) for  |       |            |
   |   | powering external device          |       |            |
   |---+-----------------------------------+-------+------------|
   |>> | Allows connection of internal     | JP26  |   Closed   |
   |   | +5V, via resistor, to pin 14 of   |       |            |
   |   | main link connector (CN4) for     |       |            |
   |   | powering external device          |       |            |
   |---+-----------------------------------+-------+------------|
   |   | Does not allow connection of      | JP26  |    Open    |
   |   | internal +5V, via resistor, to    |       |            |
   |   | pin 14 of main link connector     |       |            |
   |   | (CN4) for powering external       |       |            |
   |   | device                            |       |            |
   |---+-----------------------------------+-------+------------|
   |>> | Receive side ground reference set | JP27  |    Open    |
   |   | for balanced interface            |       |            |
   |---+-----------------------------------+-------+------------|
   |   | Receive side ground reference set | JP27  |   Closed   |
   |   | for unbalanced interface          |       |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        TERMINATION                         |
   |------------------------------------------------------------|
   |        Function        |  JP18  |  JP19  |  JP20  |  JP21  |
   |------------------------+--------+--------+--------+--------|
   |>> | Balanced interface | Pins 1 | Pins 1 | Pins 1 | Pins 1 |
   |   |   compatibility    |  & 2   |  & 2   |  & 2   |  & 2   |
   |   |      enabled       |        |        |        |        |
   |---+--------------------+--------+--------+--------+--------|
   |   |     Unbalanced     | Pins 2 | Pins 2 | Pins 2 | Pins 2 |
   |   |     interface      |  & 3   |  & 3   |  & 3   |  & 3   |
   |   |   compatibility    |        |        |        |        |
   |   |      enabled       |        |        |        |        |
   |------------------------------------------------------------|
   | Note: Pins designated are in the closed position           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   |   LED    |    Color     | Status |        Condition        |
   |----------+--------------+--------+-------------------------|
   |   RTS    | Unidentified |   On   |  Control input line in  |
   |          |              |        |  V.35 DTE port is high  |
   |----------+--------------+--------+-------------------------|
   |   RTS    | Unidentified |  Off   |  Control input line in  |
   |          |              |        |  V.35 DTE port is low   |
   |----------+--------------+--------+-------------------------|
   |   DCD    | Unidentified |   On   | Indication output line  |
   |          |              |        |   in V.35 DTE port is   |
   |          |              |        |          high           |
   |----------+--------------+--------+-------------------------|
   |   DCD    | Unidentified |  Off   | Indication output line  |
   |          |              |        | in V.35 DTE port is low |
   |----------+--------------+--------+-------------------------|
   |     TD   | Unidentified |   On   |   Device is detecting   |
   |          |              |        |  pulses from the local  |
   |          |              |        |           DTE           |
   |----------+--------------+--------+-------------------------|
   |    TD    | Unidentified |  Off   | Device is not detecting |
   |          |              |        |  pulses from the local  |
   |          |              |        |           DTE           |
   |----------+--------------+--------+-------------------------|
   |    RD    | Unidentified |   On   |   Device is receiving   |
   |          |              |        |   pulses from network   |
   |----------+--------------+--------+-------------------------|
   |    RD    | Unidentified |  Off   | Device is not receiving |
   |          |              |        |   pulses from network   |
   |----------+--------------+--------+-------------------------|
   |   LOC    | Unidentified |   On   |  Local synchronization  |
   |          |              |        |          lost           |
   |----------+--------------+--------+-------------------------|
   |   LOC    | Unidentified |  Off   |  Local synchronization  |
   |          |              |        |           OK            |
   |----------+--------------+--------+-------------------------|
   |   REM    | Unidentified |   On   | Remote synchronization  |
   |          |              |        |          lost           |
   |----------+--------------+--------+-------------------------|
   |   REM    | Unidentified |  Off   | Remote synchronization  |
   |          |              |        |           OK            |
   |----------+--------------+--------+-------------------------|
   |      TST | Unidentified |   On   |  Device loopback test   |
   |          |              |        |         active          |
   |----------+--------------+--------+-------------------------|
   |   TST    | Unidentified |  Off   |  device loopback test   |
   |          |              |        |       not running       |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/t/P-R/54853-2.png>
   

   LTU BOARD

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function       | Label |      Function       | Label |
   |----------------------+-------+---------------------+-------|
   | Mainboard connector  |  J5   | Mainboard connector |  J7   |
   |----------------------+-------+---------------------+-------|
   | Mainboard connector  |  J6   |                     |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Setting                 | Label  | Position |
   |----------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  |  JP5   |   Open   |
   |---+------------------------------------+--------+----------|
   |>> | Factory configured - do not alter  |  JP6   |   Open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  E1 OUTPUT LEVEL SELECTIO                  |
   |------------------------------------------------------------|
   |             Net build              |  Label  |  Position   |
   |------------------------------------+---------+-------------|
   |>> |              0dB               |   SW1   |      1      |
   |---+--------------------------------+---------+-------------|
   |   |             -7.5dB             |   SW1   |      2      |
   |---+--------------------------------+---------+-------------|
   |   |             -15dB              |   SW1   |      3      |
   +------------------------------------------------------------+