U.S. ROBOTICS, INC.
===================

   SPORTSTER 56K FAXMODEM (EXTERNAL)

   Card Type              Modem (asynchronous)                    
   Chipset                U.S. Robotics, Inc.                     
   Maximum Data Rate      56Kbps                                  
   Maximum Fax Rate       14.4Kbps                                
   Data Modulation        Bell 103A/212A                          
                                                                  
                          ITU-T V.21, V.22, V.22bis, V.23, V.32,  
                          V.32bis, V.34                           
                                                                  
                          U.S. Robotics x2                        
   Fax Modulation         ITU-T V.17, V.21CH2, V.27ter, V.29      
   Error                  MNP5, V.42, V.42bis                     
   Correction/Compression 
   Fax Class              Class I & II                            
   Data Bus               Serial                                  

<gopher://bitreich.org/I/th99/t/U-Z/53741-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Function      | Label |        Function        | Label |
   |-------------------+-------+------------------------+-------|
   | DC power in       |  CN1  | Telephone line in      |  CN3  |
   |-------------------+-------+------------------------+-------|
   | Serial port       |  CN2  | Telephone line out     |  CN4  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   |  LED  | Color  |  Status  |           Condition            |
   |-------+--------+----------+--------------------------------|
   |  AA   |  Red   |    On    |      Auto-answer enabled       |
   |-------+--------+----------+--------------------------------|
   |  AA   |  Red   |   Off    |      Auto-answer disabled      |
   |-------+--------+----------+--------------------------------|
   |  AA   |  Red   | Blinking |        Phone is ringing        |
   |-------+--------+----------+--------------------------------|
   |  CD   |  Red   |    On    |    Carrier signal detected     |
   |-------+--------+----------+--------------------------------|
   |  CD   |  Red   |   Off    |  Carrier signal not detected   |
   |-------+--------+----------+--------------------------------|
   |  SD   |  Red   | Blinking |   Modem is transmitting data   |
   |-------+--------+----------+--------------------------------|
   |  SD   |  Red   |   Off    | Modem is not transmitting data |
   |-------+--------+----------+--------------------------------|
   |  RD   |  Red   | Blinking |    Modem is receiving data     |
   |-------+--------+----------+--------------------------------|
   |  RD   |  Red   |   Off    |  Modem is not receiving data   |
   |-------+--------+----------+--------------------------------|
   |  TR   |  Red   |    On    |       DTR signal is high       |
   |-------+--------+----------+--------------------------------|
   |  TR   |  Red   |   Off    |       DTR signal is low        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DIAGNOSTIC LED(S) (CON'T)                  |
   |------------------------------------------------------------|
   |   LED   | Color |  Status  |           Condition           |
   |---------+-------+----------+-------------------------------|
   |   CS    |  Red  |    On    |      CTS signal is high       |
   |---------+-------+----------+-------------------------------|
   |   CS    |  Red  |   Off    |       CTS signal is low       |
   |---------+-------+----------+-------------------------------|
   | ARQ/FAX |  Red  |    On    |  Modem is connected in error  |
   |         |       |          |        correction mode        |
   |---------+-------+----------+-------------------------------|
   | ARQ/FAX |  Red  |   Off    |   Modem is not connected in   |
   |         |       |          |     error correction mode     |
   |---------+-------+----------+-------------------------------|
   | ARQ/FAX |  Red  | Blinking |   Modem is connected in FAX   |
   |         |       |          |       mode or modem is        |
   |         |       |          |  retransmitting data due to   |
   |         |       |          |            errors             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SUPPORTED STANDARD COMMANDS                 |
   |------------------------------------------------------------|
   |                     Basic AT Commands                      |
   |------------------------------------------------------------|
   | +++, 'comma', A/                                           |
   |------------------------------------------------------------|
   | A, B, D, E, F, H, L, M, O, P, T, V, X, Z                   |
   |------------------------------------------------------------|
   | &C, &D, &F, &G, &P, &R, &S, &T, &W                         |
   |------------------------------------------------------------|
   |                        S-Registers                         |
   |------------------------------------------------------------|
   | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12,     |
   | S18, S25, S38                                              |
   |------------------------------------------------------------|
   |      Note: See MHI help file for complete information.     |
   +------------------------------------------------------------+

                     Proprietary AT Command Set

   See U.S. ROBOTICS SPORTSTER 56K FAXMODEM (INTERNAL) for a full
                          command summary.