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       # SOUTH MOUNTAIN TELECOMMUNICATIONS
       
          SM-5743
       
          Card Type              Fax, Modem (asynchronous)               
          Chip Set               Unidentified                            
          Maximum Modem Rate     14.4Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Bus               8-bit ISA                               
          Fax Class              Class I & II                            
          Data Modulation        Bell 103A/212A                          
          Protocol                                                       
                                 ITU-T V.21,V.22, V.22bis, V.32, V.32bis 
          Fax Modulation         ITU-T V.17, V.21 ch2, V.27ter, V.29     
          Protocol               
          Error                  MNP2-5, V.42, V.42bis                   
          Correction/Compression 
          Boot ROM               Not available                           
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        |  Label   |   Function   |  Label  |
          |------------------------------------------------------------|
          | Line in                     |    CN1     | Line out | CN2  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    SERIAL PORT ADDRESS                     |
          |------------------------------------------------------------|
          |      Setting       |       SW1/1       |       SW1/2       |
          |--------------------+-------------------+-------------------|
          |   í COM1 (3F8h)    |        On         |        On         |
          |--------------------+-------------------+-------------------|
          |    COM2 (2F8h)     |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |    COM3 (3E8h)     |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |    COM4 (2E8h)     |        Off        |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         INTERRUPT                          |
          |------------------------------------------------------------|
          |      Setting       |       SW1/3       |       SW1/4       |
          |--------------------+-------------------+-------------------|
          |         2          |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |         3          |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |        í 4         |        On         |        On         |
          |--------------------+-------------------+-------------------|
          |         5          |        Off        |        Off        |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                SUPPORTED STANDARD COMMANDS                 |
          |------------------------------------------------------------|
          |                     Basic AT Commands                      |
          |------------------------------------------------------------|
          | +++, ‘comma’, A/                                           |
          |------------------------------------------------------------|
          | A, D, H, L, M, N, O, Q, V, W, X, Z                         |
          |------------------------------------------------------------|
          | &D, &F, &G, &J, &K, &V, &W, &Y, &Z                         |
          |------------------------------------------------------------|
          |                    Extended AT Commands                    |
          |------------------------------------------------------------|
          | \A, \B, \G, \K, \V, \X, %A, %C, %E, %L, %Q                 |
          |------------------------------------------------------------|
          |                        S-Registers                         |
          |------------------------------------------------------------|
          | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12,     |
          | S18, S25, S26, S46, S48                                    |
          |------------------------------------------------------------|
          |      Note: See MHI documentation for complete information. |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   UNIDENTIFIED COMMANDS                    |
          |------------------------------------------------------------|
          |           Command            |           Default           |
          |------------------------------+-----------------------------|
          |             S37              |              0              |
          |------------------------------+-----------------------------|
          |             S42              |              0              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  COMMUNICATION PROTOCOLS                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Bn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Selects the communication protocol for data |
          |              | calls                                       |
          |------------------------------------------------------------|
          |      Note: The B command allows the simultaneous selection |
          |      of more than one suffix, enabling multiple protocols. |
          |------------------------------------------------------------|
          |   Command    |                  Protocol                   |
          |--------------+---------------------------------------------|
          |      B0      | ITU-T V.22 at 1200bps                       |
          |--------------+---------------------------------------------|
          |     í B1     | Bell 212A at 1200bps                        |
          |--------------+---------------------------------------------|
          |      B2      | V.23- originate mode receive at 1200bps,    |
          |              | send at 75bps; answer mode receive at       |
          |              | 75bps, send at 1200bps                      |
          |--------------+---------------------------------------------|
          |      B3      | V.23- originate mode receive at 75bps, send |
          |              | at 1200bps; answer mode receive at 1200bps, |
          |              | send at 75bps                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CONNECT MODE                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Nn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the type of connection the modem   |
          |              | will operate in                             |
          |------------------------------------------------------------|
          |       Command        |              Function               |
          |----------------------+-------------------------------------|
          |         \N0          | Normal mode enabled                 |
          |----------------------+-------------------------------------|
          |         \N1          | Direct mode enabled                 |
          |----------------------+-------------------------------------|
          |         \N2          | MNP reliable mode enabled           |
          |----------------------+-------------------------------------|
          |         í\N4         | Auto-reliable mode enabled          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DISPLAY INFORMATION                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] In [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays information requested about the    |
          |              | modem.                                      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      I0      | Displays product identification code.       |
          |--------------+---------------------------------------------|
          |      I1      | Displays ROM checksum.                      |
          |--------------+---------------------------------------------|
          |      I3      | Displays firmware revision.                 |
          |--------------+---------------------------------------------|
          |      I4      | Displays product features.                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S30=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-90                                        |
          |--------------+---------------------------------------------|
          | Unit:        | 1 minute                                    |
          |--------------+---------------------------------------------|
          | Description: | Maximum duration of DTE and DCE inactivity  |
          |              | allowed prior to initiating hang-up         |
          |              | process.                                    |
          |--------------+---------------------------------------------|
          | Note:        | S30=0 disables the timer and allows         |
          |              | indefinite inactivity.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    V.32 - AUTO-RETRAIN                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls auto-retrain function if poor line |
          |              | quality is detected                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &B0      | Auto-retrain disabled modem hangs-up        |
          |--------------+---------------------------------------------|
          |    í &B1     | Auto-retrain enabled if line quality is     |
          |              | poor                                        |
          |--------------+---------------------------------------------|
          |     &B2      | No hang-up, no auto-retrain                 |
          +------------------------------------------------------------+