3COM CORPORATION
================

   COURIER V.32BIS WITH ASL

   Modem Type             Data (synchronous/asynchronous)         
   Maximum Data Rate      14.4Kbps                                
   Data Bus               External                                
   Data Modulation        Bell 103A/212A                          
   Protocol                                                       
                          ITU-T V.22, V.22bis, V.23, V.32,        
                          V.32bis                                 
   Error                  MNP5, V.42, V.42bis                     
   Correction/Compression 

<gopher://bitreich.org/I/th99/t/0-9/54141-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Purpose      | Location |      Purpose      | Location |
   |------------------+----------+-------------------+----------|
   | Line out         |   CN1    | DC power          |   CN4    |
   |------------------+----------+-------------------+----------|
   | Line in          |   CN2    | Volume            |    R1    |
   |------------------+----------+-------------------+----------|
   | RS-232/422       |   CN3    | Power switch      |   SW2    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      MI/MIC POLARITY                       |
   |------------------------------------------------------------|
   | Setting          |         J6         |         J8         |
   |------------------+--------------------+--------------------|
   |>> Normal         | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   | Reversed         | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    TX/RX PIN ASSIGNMENT                    |
   |------------------------------------------------------------|
   | Setting                    |              SW3              |
   |----------------------------+-------------------------------|
   |>> Off                      |       Normal operation        |
   |----------------------------+-------------------------------|
   | On                         | reverse TX/RX pin assignments |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         DTR SIGNAL                         |
   |------------------------------------------------------------|
   | Setting                    |             SW1/1             |
   |----------------------------+-------------------------------|
   |>> On                       |        DTR forced high        |
   |----------------------------+-------------------------------|
   | Off                        |          DTR normal           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        RESULT CODES                        |
   |------------------------------------------------------------|
   | Setting                    |             SW1/2             |
   |----------------------------+-------------------------------|
   |>> Off                      | Verbose result codes enabled  |
   |----------------------------+-------------------------------|
   | On                         | Numeric result codes enabled  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    RESULT CODES DISPLAY                    |
   |------------------------------------------------------------|
   | Setting                    |             SW1/3             |
   |----------------------------+-------------------------------|
   |>> On                       |        Display enabled        |
   |----------------------------+-------------------------------|
   | Off                        |       Display disabled        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   ECHO COMMANDS DISPLAY                    |
   |------------------------------------------------------------|
   | Setting                    |             SW1/4             |
   |----------------------------+-------------------------------|
   |>> Off                      |      Local echo enabled       |
   |----------------------------+-------------------------------|
   | On                         |      Local echo disabled      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        AUTO ANSWER                         |
   |------------------------------------------------------------|
   | Setting              |                SW1/5                |
   |----------------------+-------------------------------------|
   |>> On                 | Modem does not answer on first ring |
   |----------------------+-------------------------------------|
   | Off                  |     Modem answers on first ring     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       CARRIER DETECT                       |
   |------------------------------------------------------------|
   | Setting                    |             SW1/6             |
   |----------------------------+-------------------------------|
   |>> Off                      |           CD normal           |
   |----------------------------+-------------------------------|
   | On                         |        CD forced high         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    RESULT CODES DISPLAY                    |
   |------------------------------------------------------------|
   | Setting |                      SW1/7                       |
   |---------+--------------------------------------------------|
   |>> Off   |   Display result codes in originate and answer   |
   |         |                      modes                       |
   |---------+--------------------------------------------------|
   | On      |       display result codes in Answer mode        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       AT COMMAND SET                       |
   |------------------------------------------------------------|
   | Setting                    |             SW1/8             |
   |----------------------------+-------------------------------|
   |>> On                       |    AT command set enabled     |
   |----------------------------+-------------------------------|
   | Off                        |    AT command set disabled    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        ESCAPE CODE                         |
   |------------------------------------------------------------|
   | Setting |                      SW1/9                       |
   |---------+--------------------------------------------------|
   |>> Off   |  Disconnect, go to command mode and display NO   |
   |         |    CARRIER when escape character is received     |
   |---------+--------------------------------------------------|
   | On      |  Go to command mode and display OK result code   |
   |         |        when escape character is received         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        USER PROFILE                        |
   |------------------------------------------------------------|
   | Setting                    |            SW1/10             |
   |----------------------------+-------------------------------|
   |>> Off                      |      Use stored profile       |
   |----------------------------+-------------------------------|
   | On                         |      Use factory default      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         VOICE/DATA                         |
   |------------------------------------------------------------|
   |            Setting            |            SW4             |
   |------------------------------------------------------------|
   | Note: for switch functions see table for register S32.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED | Color |  Status  |             Condition             |
   |-----+-------+----------+-----------------------------------|
   | HS  |  Red  |    On    | Modem is operating at 4800bps or  |
   |     |       |          |              faster               |
   |-----+-------+----------+-----------------------------------|
   | HS  |  Red  |   Off    | Modem is operating at slower than |
   |     |       |          |              4800bps              |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  |    On    |        Auto-answer enabled        |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  |   Off    |       Auto-answer disabled        |
   |-----+-------+----------+-----------------------------------|
   | CD  |  Red  |    On    |      Carrier signal detected      |
   |-----+-------+----------+-----------------------------------|
   | CD  |  Red  |   Off    |    Carrier signal not detected    |
   |-----+-------+----------+-----------------------------------|
   | OH  |  Red  |    On    |         Modem is off-hook         |
   |-----+-------+----------+-----------------------------------|
   | OH  |  Red  |   Off    |         Modem is on-hook          |
   |-----+-------+----------+-----------------------------------|
   | RX  |  Red  | Blinking |      Modem is receiving data      |
   |-----+-------+----------+-----------------------------------|
   | RX  |  Red  |   Off    |    Modem is not receiving data    |
   |-----+-------+----------+-----------------------------------|
   | TX  |  Red  | Blinking |    Modem is transmitting data     |
   |-----+-------+----------+-----------------------------------|
   | TX  |  Red  |   Off    |  Modem is not transmitting data   |
   |-----+-------+----------+-----------------------------------|
   | TR  |  Red  |    On    |        DTR signal is high         |
   |-----+-------+----------+-----------------------------------|
   | TR  |  Red  |   Off    |         DTR signal is low         |
   |-----+-------+----------+-----------------------------------|
   | MR  |  Red  |    On    |            Power is on            |
   |-----+-------+----------+-----------------------------------|
   | MR  |  Red  |   Off    |           Power is off            |
   |-----+-------+----------+-----------------------------------|
   | MR  |  Red  | Blinking |       Retraining/test mode        |
   |-----+-------+----------+-----------------------------------|
   | RS  |  Red  |    On    |        RTS signal is high         |
   |-----+-------+----------+-----------------------------------|
   | RS  |  Red  |   Off    |         RTS signal is low         |
   |-----+-------+----------+-----------------------------------|
   | CS  |  Red  |    On    |        CTS signal is high         |
   |-----+-------+----------+-----------------------------------|
   | CS  |  Red  |   Off    |         CTS signal is low         |
   |-----+-------+----------+-----------------------------------|
   | EC  |  Red  |    On    |       Error control enabled       |
   |-----+-------+----------+-----------------------------------|
   | EC  |  Red  |   Off    |      Error control disabled       |
   |-----+-------+----------+-----------------------------------|
   | EC  |  Red  | Blinking |   Modem is retransmitting data    |
   |-----+-------+----------+-----------------------------------|
   | SYN |  Red  |    On    |         Synchronous mode          |
   |-----+-------+----------+-----------------------------------|
   | SYN |  Red  |   Off    |         Asynchronous mode         |
   +------------------------------------------------------------+

                     Proprietary AT Command Set

           See document V1264 for a full command summary.