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       # 3COM CORPORATION
       
          US ROBOTICS 33.6KBPS (EXTERNAL)
       
          Card Type              Modem                                   
          Chip Set               Unidentified                            
          I/O Options            Line out, line in                       
          Maximum Modem Rate     33.6Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Modulation        Bell 103A/212A, ITU-T V.21, V.22,       
          Protocol               V.22bis,V.32, V.32bis, V.34, V.FC       
          Fax Modulation         V.17, V.21, CH2, V.27ter, V.29          
          Protocol               
          Error                  MNP2-4, V.42                            
          Correction/Compression 
          Fax Class              Class I & II                            
          Data Bus               External                                
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |    Function     | Label  |     Function     |    Label     |
          |------------------------------------------------------------|
          | RJ-11 line in        |   CN1   | 25-pin serial port | CN3  |
          |----------------------+---------+--------------------+------|
          | RJ-11 line out       |   CN2   | Power Jack         | CN4  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |   LED   |     Color      |  Status  |      Condition       |
          |---------+----------------+----------+----------------------|
          |   AA    |  Unidentified  |    On    | Auto-answer enabled  |
          |---------+----------------+----------+----------------------|
          |   AA    |   Unidentified |   Off    | Auto-answer disabled |
          |---------+----------------+----------+----------------------|
          |   AA    |  Unidentified  | Blinking |   Phone is ringing   |
          |---------+----------------+----------+----------------------|
          |   CD    |  Unidentified  |    On    |    Carrier signal    |
          |         |                |          | detected, connection |
          |         |                |          |     established      |
          |---------+----------------+----------+----------------------|
          |   CD    |  Unidentified  |   Off    |  Carrier signal not  |
          |         |                |          |       detected       |
          |---------+----------------+----------+----------------------|
          |   RD    |   Unidentified | Blinking |  Modem is receiving  |
          |         |                |          |         data         |
          |---------+----------------+----------+----------------------|
          |   RD    |  Unidentified  |   Off    |     Modem is not     |
          |         |                |          |    receiving data    |
          |---------+----------------+----------+----------------------|
          |   TR    |   Unidentified | Blinking |  Modem is receiving  |
          |         |                |          |    DTR signal/DTR    |
          |         |                |          |    override is on    |
          |---------+----------------+----------+----------------------|
          |   TR    |  Unidentified  |   Off    |     Modem is not     |
          |         |                |          | receiving DTR signal |
          |---------+----------------+----------+----------------------|
          |   CS    |  Unidentified  |    On    |  CTS signal is high  |
          |---------+----------------+----------+----------------------|
          |   CS    |  Unidentified  |   Off    |  CTS signal is low   |
          |---------+----------------+----------+----------------------|
          | ARQ/FAX |   Unidentified |    On    |  Modem established   |
          |         |                |          |    error control     |
          |---------+----------------+----------+----------------------|
          | ARQ/FAX |  Unidentified  | Blinking | Modem retransmitting |
          |         |                |          |    data/Fax mode     |
          |         |                |          |       enabled        |
          |---------+----------------+----------+----------------------|
          | ARQ/FAX |  Unidentified  |   Off    |    Modem has not     |
          |         |                |          |  established error   |
          |         |                |          |       control        |
          +------------------------------------------------------------+
       
                                                                        
       
          +------------------------------------------------------------+
          |                   SUPPORTED COMMAND SET                    |
          |------------------------------------------------------------|
          |                     Basic AT Commands                      |
          |------------------------------------------------------------|
          | AT, A/, +++                                                |
          |------------------------------------------------------------|
          | A, B, E, F, H, M, O, P, T, V                               |
          |------------------------------------------------------------|
          | &C, &G, &T, &W                                             |
          |------------------------------------------------------------|
          |                        S Registers                         |
          |------------------------------------------------------------|
          | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12,     |
          | S18, S25, S38                                              |
          |------------------------------------------------------------|
          |                                                            |
          |------------------------------------------------------------|
          |                      Special Commands                      |
          |------------------------------------------------------------|
          | #CID                                                       |
          |------------------------------------------------------------|
          |                                                            |
          |------------------------------------------------------------|
          | Note: See MHI Help File for full command documentation.    |
          +------------------------------------------------------------+
       
          For a full command summary, see 3COM CORPORATION, US ROBOTICS