RAD DATA COMMUNICATIONS

FCD-12

Card Type                  T1 CSU/DSU
Chip Set                   Unidentified
I/O Options                AC power connector, 25-pin DTE/DCE ports (2),

                           9-pin serial port (RS-232), T1 network interface
                           via 15-pin connector
T1 Transfer Rate           1.544Mbps
T1 Protocol                Transparent, AMI, B7ZS, B8ZS
Frame Type                 D4, ESF
Data Bus                   External

[Image]

                                CONNECTIONS

         Function             Label           Function            Label

  AC power connector           CN1      CSU board connector        J2

  Serial port                  CN2      CSU board connector        J3

  25-pin DTE/DCE port -        CN3      CSU board connector        J4
  channel 2

  25-pin DTE/DCE port -        CN4      Power switch               SW2
  channel 1

  15-pin T1 port               CN5

  Note:

  Jumpers must be installed on pins 1&2 and 3&4 of connectors J3 & J4 to
  maintain signal path continuity when the CSU 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                    JP5          Pins 1 & 2
                                                              closed

      Watchdog timer disabled                   JP5          Pins 2 & 3
                                                              closed

  »   Signal ground is connected to the         JP11         Pins 2 & 3
      frame ground                                            closed

      Signal ground is not connected to         JP11         Pins 1 & 2
      the frame ground                                        closed

  »   Internal -5V enabled                      JP20         Pins 1 & 2
                                                              closed

      Grounded to pin 15 in the main link       JP20         Pins 2 & 3
      connector (CN5)                                         closed

  »   Allows connection of the line             JP23          Closed
      controlled by JP20 to pin 15 of main
      link connector (CN5) for powering
      external device

      Does not allow connection of the          JP23           Open
      line controlled by JP20 to pin 15 of
      main link connector (CN5) for
      powering external device

  »   Allows connection of internal +5V,        JP24          Closed
      via resistor, to pin 14 of main link
      connector (CN5) for powering
      external device

      Does not allow connection of              JP24           Open
      internal +5V, via resistor, to pin
      14 of main link connector (CN5) for
      powering external device

                       CHANNEL 1 INTERFACE SELECTION

               interface                             Setting

  »   RS-530, X.21, RS-449, RS-422        Interface changer board on J6

      V.35                                Interface changer board on J7

                       CHANNEL 2 INTERFACE SELECTION

               interface                             Setting

  »   RS-530, X.21, RS-449, RS-422        Interface changer board on J8

      V.35                                Interface changer board on J9

                             DIAGNOSTIC LED(S)

    LED          Color          Status               Condition

    TD1       Unidentified        On         DSU/CSU is detecting pulses
                                             from the DTE on channel 1

    TD1       Unidentified        Off         DSU/CSU is not detecting
                                            pulses from DTE on channel 1

    RD1       Unidentified        On         DSU/CSU is receiving pulses
                                             from network on channel 1

    RD1       Unidentified        Off         DSU/CSU is not receiving
                                           pulses from network on channel
                                                         1

    TD2       Unidentified        On         DSU/CSU is detecting pulses
                                             from the DTE on channel 2

    TD2       Unidentified        Off         DSU/CSU is not detecting
                                            pulses from DTE on channel 2

    RD2       Unidentified        On         DSU/CSU is receiving pulses
                                             from network on channel 2

    RD2       Unidentified        Off         DSU/CSU is not receiving
                                           pulses from network on channel
                                                         2

    RED       Unidentified        On         DSU/CSU is detecting a red
                                                  alarm condition

    RED       Unidentified        Off      DSU/CSU is not detecting a red
                                                  alarm condition

    YEL       Unidentified        On        DSU/CSU is detecting a yellow
                                                  alarm condition

    YEL       Unidentified        Off        DSU/CSU is not detecting a
                                               yellow alarm condition

            TSUnidentified        On          DSU or CSU loopback test
                                                       active

    TST       Unidentified        Off       DSU or CSU loopback test not
                                                      running

[Image]

CSU BOARD

                                CONNECTIONS

           Function             Label           Function           Label

  Mainboard connector            J5     Mainboard connector          J7

  Mainboard connector            J6

                         T1 OUTPUT LEVEL SELECTION

                Net build                    Label          Position

  »                  0dB                      SW1               1

                   -7.5dB                     SW1               2

                    -15dB                     SW1               3