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       # 3COM CORPORATION
       
          US ROBOTICS 56K VOICE FAXMODEM (MODEL 0026500)
       
          Card Type              Modem (asynchronous)                    
          Chipset                U.S. Robotics                           
          I/O Options            Voice, speakerphone, 25-pin serial      
                                 port, power, RJ-45 connector, line in,  
                                 line out                                
          Maximum Data Rate      56Kbps                                  
          Maximum Fax Rate       14.4Kbps                                
          Data Modulation        Bell 103/212A                           
                                                                         
                                 ITU-T V.21, V.22, V.22bis, V.23, V.32,  
                                 V.32bis, V.34, V.34+                    
                                                                         
                                 U.S. Robotics x2                        
          Fax Modulation         ITU-T V.17, V.21, V.27ter, V.29         
          Video Modulation       ITU-T V.80                              
          Error                  MNP5, V.42, V.42bis                     
          Correction/Compression 
          Fax Class              Class I & II                            
          Data Bus               External                                
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        | Label |     Function      | Label |
          |------------------------+-------+-------------------+-------|
          | 25-pin serial port     |  CN1  | Line out          |  CN4  |
          |------------------------+-------+-------------------+-------|
          | RJ-45 interface        |  CN2  | Line in           |  CN5  |
          |------------------------+-------+-------------------+-------|
          | AC power               |  CN3  | Power button      | POWER |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED  |    Color     | Status |          Condition          |
          |------+--------------+--------+-----------------------------|
          | PWR  | Unidentified |   On   |         Power is on         |
          |------+--------------+--------+-----------------------------|
          | PWR  | Unidentified |  Off   |        Power is off         |
          |------+--------------+--------+-----------------------------|
          |  SD  | Unidentified |   On   | Modem is transmitting data  |
          |------+--------------+--------+-----------------------------|
          |  SD  | Unidentified |  Off   |  Modem is not transmitting  |
          |      |              |        |            data             |
          |------+--------------+--------+-----------------------------|
          |  RD  | Unidentified |   On   |   Modem is receiving data   |
          |------+--------------+--------+-----------------------------|
          |  RD  | Unidentified |  Off   | Modem is not receiving data |
          |------+--------------+--------+-----------------------------|
          | LINK | Unidentified |   On   | Modem is receiving a signal |
          |      |              |        |        from network         |
          |------+--------------+--------+-----------------------------|
          | LINK | Unidentified |  Off   |      Modem is off-line      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                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.