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

[Image]

                                CONNECTIONS

        Function            Label            Function            Label

  Power connector            CN1       Network interface via      CN3
                                       RJ-48 connector

  DTE/DCE port (quick        CN2
  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 from       S1/7           On
       DTE

       Modem responds to local analog             S1/7           Off
       loopback requests from DTE

  »    Modem ignores loopback requests from       S1/8           On
       remote

       Modem responds to loopback requests        S1/8           Off
       from remote

                           TRANSMIT CLOCK SOURCE

                  Source                         S1/1           S1/2

  »    Transmit clock derived from receive       Off             On
           line signal. Dedicated DDS
                   operation

       Transmit clock derived from receive        On             On
        line signal. Allows remote device
             to initiate loopback.

       Transmit clock generated internally       Off             Off

           Transmit clock derived from            On             Off
               terminal interface

                          LOOPBACK TEST SELECTOR

                  Function                      Label         Position

     Remote digital loopback initiated           SW4              1

  Normal operation. Loopback not activated       SW4              2

      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