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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               External                                
          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    | DC power     | CN4  |
          |---------------------------+----------+--------------+------|
          | Line out                  |   CN2    | Power switch | SW1  |
          |---------------------------+----------+--------------+------|
          | RS-232/422                |   CN3    |              |      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |  LED  | Color  |  Status  |           Condition            |
          |-------+--------+----------+--------------------------------|
          |  MR   |  Red   |    On    |          Power is on           |
          |-------+--------+----------+--------------------------------|
          |  MR   |  Red   |   Off    |          Power is off          |
          |-------+--------+----------+--------------------------------|
          |  TR   |  Red   |    On    |       DTR signal is high       |
          |-------+--------+----------+--------------------------------|
          |  TR   |  Red   |   Off    |       DTR signal is low        |
          |-------+--------+----------+--------------------------------|
          |  TD   |  Red   | Blinking |   Modem is transmitting data   |
          |-------+--------+----------+--------------------------------|
          |  TD   |  Red   |   Off    | Modem is not transmitting data |
          |-------+--------+----------+--------------------------------|
          |  RD   | Amber  | Blinking |    Modem is receiving data     |
          |-------+--------+----------+--------------------------------|
          |  RD   | Amber  |   Off    |  Modem is not receiving data   |
          |-------+--------+----------+--------------------------------|
          |  OH   |  Red   |    On    |       Modem is off-hook        |
          |-------+--------+----------+--------------------------------|
          |  OH   |  Red   |   Off    |        Modem is on-hook        |
          |-------+--------+----------+--------------------------------|
          |  CD   |  Red   |    On    |    Carrier signal detected     |
          |-------+--------+----------+--------------------------------|
          |  CD   |  Red   |   Off    |  Carrier signal not detected   |
          |-------+--------+----------+--------------------------------|
          |  AA   |  Red   |    On    |      Auto-answer enabled       |
          |-------+--------+----------+--------------------------------|
          |  AA   |  Red   |   Off    |      Auto-answer disabled      |
          |-------+--------+----------+--------------------------------|
          |  AA   |  Red   | Blinking |        Phone is ringing        |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                SUPPORTED STANDARD COMMANDS                 |
          |------------------------------------------------------------|
          |                     Basic AT Commands                      |
          |------------------------------------------------------------|
          | +++, ‘comma’, A/                                           |
          |------------------------------------------------------------|
          | A, B, 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            |
          |----------------------------+-------------------------------|
          |            S27             |         Unidentified          |
          |----------------------------+-------------------------------|
          |            S36             |               0               |
          |----------------------------+-------------------------------|
          |            S40             |              57               |
          |----------------------------+-------------------------------|
          |            S42             |               0               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        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                 |
          +------------------------------------------------------------+