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

   FOM-T1

   Modem Type               Data (synchronous/asynchronous)       
   Maximum Data Rate        2.048Mbps                             
   Data Bus                 External                              
   Data Modulation Protocol Proprietary                           

<gopher://bitreich.org/I/th99/t/P-R/51527-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |    Purpose     | Location |       Purpose       | Location |
   |----------------+----------+---------------------+----------|
   | DB-15          |   CN1    | Receive fiber       |    RX    |
   |----------------+----------+---------------------+----------|
   | AC power       |   CN2    | Coaxial connector   |   OUT    |
   |                |          | out                 |          |
   |----------------+----------+---------------------+----------|
   | Transmit fiber |    TX    | Coaxial connector   |    IN    |
   |                |          | in                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                CHASSIS TO ELECTRICAL GROUND                |
   |------------------------------------------------------------|
   | Setting                    |              JP1              |
   |----------------------------+-------------------------------|
   |>> Connected                |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   | Disconnected               |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                           INPUT                            |
   |------------------------------------------------------------|
   | Setting                       |            SW2             |
   |-------------------------------+----------------------------|
   | Grounded                      |            Off             |
   |-------------------------------+----------------------------|
   |>> Floating                    |             On             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         INTERFACE                          |
   |------------------------------------------------------------|
   | Setting                       |            SW4             |
   |-------------------------------+----------------------------|
   |>> 100 Omhs-(DB-15) T1         |       Position 1 on        |
   |-------------------------------+----------------------------|
   |>> 120 Omhs-(DB-15) E1         |       Position 2 on        |
   |-------------------------------+----------------------------|
   | 75 Omhs-(BNC) E1              |       Position 3 on        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     OPTICAL AIS SIGNAL                     |
   |------------------------------------------------------------|
   | Setting                       |            SW5             |
   |-------------------------------+----------------------------|
   |>> Off                         |            Off             |
   |-------------------------------+----------------------------|
   | On                            |             On             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                           OUTPUT                           |
   |------------------------------------------------------------|
   | Setting                       |            SW3             |
   |-------------------------------+----------------------------|
   | Grounded                      |            Off             |
   |-------------------------------+----------------------------|
   |>> Floating                    |             On             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                           RANGE                            |
   |------------------------------------------------------------|
   | Setting                       |            SW1             |
   |-------------------------------+----------------------------|
   |>> Short                       |            Off             |
   |-------------------------------+----------------------------|
   | Long                          |             On             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   |  LED   |  Color  |  Status  |          Condition           |
   |--------+---------+----------+------------------------------|
   |   L1   |   Red   |    On    |         Power is on          |
   |--------+---------+----------+------------------------------|
   |   L1   |   Red   |   Off    |         Power is off         |
   |--------+---------+----------+------------------------------|
   |   L2   |   Red   |    On    | Optical signal below -43dBm  |
   |--------+---------+----------+------------------------------|
   |   L2   |   Red   |   Off    | All link equipment operating |
   +------------------------------------------------------------+