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

   ASM-40 V.35 AND X.21

   Modem Type               Data (Synchronous)                    
   Maximum Data Rate        2.048Mbps                             
   Data Bus                 External                              
   Data Modulation Protocol Proprietary                           

<gopher://bitreich.org/I/th99/t/P-R/51525-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Purpose     | Location |      Purpose       | Location |
   |-----------------+----------+--------------------+----------|
   | V.35/X.21/G.703 |   CN1    | Digital loopback   |   DIG    |
   |                 |          | switch             |          |
   |-----------------+----------+--------------------+----------|
   | AC power        |   CN2    | Analog loopback    |   ANA    |
   |                 |          | switch             |          |
   |-----------------+----------+--------------------+----------|
   | Ground          |   GND    | Remote loopback    |   REM    |
   |                 |          | switch             |          |
   |-----------------+----------+--------------------+----------|
   | Receive         |   RCV    | Test pattern       |   PATT   |
   |-----------------+----------+--------------------+----------|
   | Transmit        |   XMT    |                    |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      ANALOG LOOPBACK                       |
   |------------------------------------------------------------|
   | Setting                    |              JP4              |
   |----------------------------+-------------------------------|
   | Enabled                    |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |>> Disabled                 |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         BAUD RATE                          |
   |------------------------------------------------------------|
   | Setting                       |            SW1             |
   |-------------------------------+----------------------------|
   | 2.048Mbps                     |             0              |
   |-------------------------------+----------------------------|
   | 1.544Mbps                     |             1              |
   |-------------------------------+----------------------------|
   | 1.535Mbps                     |             2              |
   |-------------------------------+----------------------------|
   | 1.024Mbps                     |             3              |
   |-------------------------------+----------------------------|
   | 756Kbps                       |             4              |
   |-------------------------------+----------------------------|
   | 512Kbps                       |             5              |
   |-------------------------------+----------------------------|
   | 384Kbps                       |             6              |
   |-------------------------------+----------------------------|
   |>> 256Kbps                     |             7              |
   |-------------------------------+----------------------------|
   | 128Kbps                       |             8              |
   |-------------------------------+----------------------------|
   | 64Kbps                        |             9              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CHASSIS TO SIGNAL GROUND                  |
   |------------------------------------------------------------|
   | Setting                    |             JP12              |
   |----------------------------+-------------------------------|
   |>> Connected                |       Pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   | Disconnected               |       Pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        CLOCK SOURCE                        |
   |------------------------------------------------------------|
   | Setting       |    JP2/A     |    JP2/B     |    JP2/C     |
   |---------------+--------------+--------------+--------------|
   |>> Internal    |    Closed    |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   | External      |     Open     |    Closed    |     Open     |
   |---------------+--------------+--------------+--------------|
   | Loopback      |     Open     |     Open     |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     ENABLE PUSHBUTTONS                     |
   |------------------------------------------------------------|
   | Setting                       |            JP8             |
   |-------------------------------+----------------------------|
   |>> DIG, ANA, REM, PATT enabled |     Pins 1 & 2 closed      |
   |-------------------------------+----------------------------|
   | Disabled                      |     Pins 2 & 3 closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      ERROR CORRECTION                      |
   |------------------------------------------------------------|
   | Setting       |    JP7/A     |    JP7/B     |    JP7/C     |
   |---------------+--------------+--------------+--------------|
   |>> Bypass      |    Closed    |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   | Random        |     Open     |    Closed    |     Open     |
   |---------------+--------------+--------------+--------------|
   | Burst         |     Open     |     Open     |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         LINE CODE                          |
   |------------------------------------------------------------|
   | Setting       |    JP3/A     |    JP3/B     |    JP3/C     |
   |---------------+--------------+--------------+--------------|
   | AMI           |    Closed    |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   |>> HDB3        |     Open     |    Closed    |     Open     |
   |---------------+--------------+--------------+--------------|
   | B8ZS          |     Open     |     Open     |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       LINE FREQUENCY                       |
   |------------------------------------------------------------|
   | Setting                              |         SW9         |
   |--------------------------------------+---------------------|
   |>> 2048, 2024/1024, 512, 256, 128, 64 |          1          |
   |--------------------------------------+---------------------|
   | 1544/1920                            |          2          |
   |--------------------------------------+---------------------|
   | 1536, 768, 384                       |          3          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   LINE SIDE (coax cable)                   |
   |------------------------------------------------------------|
   | Setting       |  JP11/A   |  JP11/B  |  JP11/C  |  JP11/D  |
   |---------------+-----------+----------+----------+----------|
   | Balanced      |   Open    |  Closed  |  Closed  |   Open   |
   |---------------+-----------+----------+----------+----------|
   |>> Unbalanced  |  Closed   |   Open   |   Open   |  Closed  |
   |------------------------------------------------------------|
   | Note: Non-coax cable, no jumper connections selected.      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      REMOTE LOOPBACK                       |
   |------------------------------------------------------------|
   | Setting                    |              JP5              |
   |----------------------------+-------------------------------|
   | Enabled                    |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |>> Disabled                 |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      T1/E1 IMPEDANCE                       |
   |------------------------------------------------------------|
   | Setting                       |            SW10            |
   |-------------------------------+----------------------------|
   |>> 2048/1920                   |             1              |
   |-------------------------------+----------------------------|
   | 1544, 1536                    |             2              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         V.54 DELAY                         |
   |------------------------------------------------------------|
   | Setting                    |              JP6              |
   |----------------------------+-------------------------------|
   | On                         |       Pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |>> Off                      |       Pins 1 & 2 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        |
   +------------------------------------------------------------+