RAD DATA COMMUNICATIONS

FOM-40

Modem Type               Data (synchronous)
Maximum Data Rate        2048Kbps
Data Bus                 External
Data Modulation Protocol Proprietary

[Image]

                                CONNECTIONS

         Purpose            Location           Purpose          Location

  X.21/G.703                  CN1       Digital loopback           DIG
                                        switch

  AC/DC power                 CN2       Analog loopback            ANA
                                        switch

  Receive fiber                RX       Remote loopback            REM
                                        switch

  Transmit fiber               TX       Test pattern              PATT

             ANALOG LOOPBACK

  Setting                    JP6

  Enabled             Pins 1 & 2 closed

  » Disabled          Pins 2 & 3 closed

        BAUD RATE

  Setting        SW1

  1.544Mbps       0

  1.536Mbps       1

  768Kbps         2

  384Kbps         3

  2.048Mbps       4

  1.024Mbps       5

  512Kbps         6

  256Kbps         7

  128Kbps         8

  » 64Kbps        9

  112Kbps         A

  56Kbps          B

                CD SIGNAL

  Setting                    JP2

  » CD forced high     Pins 1 &2 closed

  CD normal           Pins 2 & 3 closed

         CHASSIS TO SIGNAL GROUND

  Setting                    JP5

  » Connected         Pins 1 & 2 closed

  Disconnected        Pins 2 & 3 closed

                     CLOCK SOURCE

  Setting         JP1/A         JP1/B        JP1/C

  External       Closed         Open          Open

  » Internal      Open         Closed         Open

  Receive         Open          Open         Closed

                  RANGE

  Setting                    JP3

  Long                Pins 1 & 2 closed

  » Short             Pins 2 & 3 closed

             REMOTE LOOPBACK

  Setting                    JP7

  Enabled             Pins 1 & 2 closed

  » Disabled          Pins 2 & 3 closed

                V.54 DELAY

  Setting                    JP4

  » NO                Pins 1 & 2 closed

  YES                 Pins 2 & 3 closed

                             DIAGNOSTIC LED(S)

     LED         Color        Status                 Condition

     PWR         Green          On                  Power is on

     PWR         Green          Off                Power is off

     RTS         Yellow         On            Request to Send enabled

     RTS         Yellow         Off          Request to Send disabled

     TD          Yellow         On          Modem is transmitting steady
                                                       SPACE

     TD          Yellow         Off       Modem is not transmitting data

     TD          Yellow      Blinking       Modem is transmitting data

     RD          Yellow         On        Modem is receiving steady SPACE

     RD          Yellow         Off         Modem is not receiving data

     RD          Yellow      Blinking         Modem is receiving data

     DCD         Yellow         On            Carrier signal detected

     DCD         Yellow         Off         Carrier signal not detected

    TEST          Red           On              Modem in test mode

    TEST          Red           Off           Modem not in test mode

     ERR         Yellow         On            Errors in test pattern

     ERR         Yellow         Off              Good test pattern