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       # EVEREX SYSTEMS, INC.
       
          EMAC-MD1200 (EV-936)
       
          Card Type                    Modem (asynchronous)              
          Chipset                      Unidentified                      
          I/O Options                  Speakerphone                      
          Maximum Data Rate            1200bps                           
          Data Modulation              Bell 103A/212A                    
                                                                         
                                       ITU-T V.21, V.22                  
          Error Correction/Compression None                              
          Data Bus                     Serial                            
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        | Label |     Function      | Label |
          |------------------------+-------+-------------------+-------|
          | Speakerphone button    |  BT1  | DC power in       |  CN4  |
          |------------------------+-------+-------------------+-------|
          | Mute button            |  BT2  | Microphone        |  MIC  |
          |------------------------+-------+-------------------+-------|
          | Telephone line out     |  CN1  | Volume control    |  R1   |
          |------------------------+-------+-------------------+-------|
          | Telephone line in      |  CN2  | Power switch      |  SW2  |
          |------------------------+-------+-------------------+-------|
          | RS-232/422 port        |  CN3  |                   |       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |                 Setting                 | Label | Position |
          |-----------------------------------------+-------+----------|
          | í Modem ignores DTR                     | SW1/1 |   Off    |
          |-----------------------------------------+-------+----------|
          | Modem disconnects and does not accept   | SW1/1 |    On    |
          | commands on low DTR; auto-answer is     |       |          |
          | disabled                                |       |          |
          |-----------------------------------------+-------+----------|
          | í Verbose result code format enabled.   | SW1/2 |   Off    |
          |-----------------------------------------+-------+----------|
          | Numeric result code format enabled.     | SW1/2 |    On    |
          |-----------------------------------------+-------+----------|
          | í Result codes enabled                  | SW1/3 |   Off    |
          |-----------------------------------------+-------+----------|
          | Result codes disabled                   | SW1/3 |    On    |
          |-----------------------------------------+-------+----------|
          | í Command echo enabled                  | SW1/4 |   Off    |
          |-----------------------------------------+-------+----------|
          | Command echo disabled                   | SW1/4 |    On    |
          |-----------------------------------------+-------+----------|
          | í Auto-answer disabled                  | SW1/5 |   Off    |
          |-----------------------------------------+-------+----------|
          | Auto-answer after first ring            | SW1/5 |    On    |
          |-----------------------------------------+-------+----------|
          | í CD signal forced high                 | SW1/6 |   Off    |
          |-----------------------------------------+-------+----------|
          | CD signal normal                        | SW1/6 |    On    |
          |-----------------------------------------+-------+----------|
          | í Modem is connected to RJ-11 or RJ-14  | SW1/7 |   Off    |
          | jack                                    |       |          |
          |-----------------------------------------+-------+----------|
          | Modem is connected to RJ-12 or RJ-13    | SW1/7 |    On    |
          | jack                                    |       |          |
          |-----------------------------------------+-------+----------|
          | í Command set enabled                   | SW1/8 |   Off    |
          |-----------------------------------------+-------+----------|
          | Command set disabled                    | SW1/8 |    On    |
          |-----------------------------------------+-------+----------|
          | í Modem uses Bell 212A at 1200bps       | SW1/9 |   Off    |
          |-----------------------------------------+-------+----------|
          | Modem uses ITU-T V.22 at 1200bps        | SW1/9 |    On    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED | Color |  Status  |             Condition             |
          |-----+-------+----------+-----------------------------------|
          | SPL |  Red  |    On    |   Modem is in speakerphone mode   |
          |-----+-------+----------+-----------------------------------|
          | SPL |  Red  |   Off    | Modem is not in speakerphone mode |
          |-----+-------+----------+-----------------------------------|
          | ML  |  Red  |    On    |       Speakerphone is muted       |
          |-----+-------+----------+-----------------------------------|
          | ML  |  Red  |   Off    |     Speakerphone is not muted     |
          |-----+-------+----------+-----------------------------------|
          | RI  |  Red  |    On    |         Phone is ringing          |
          |-----+-------+----------+-----------------------------------|
          | RI  |  Red  |   Off    |       Phone is not ringing        |
          |-----+-------+----------+-----------------------------------|
          | HS  |  Red  |    On    |   Modem is operating at 1200bps   |
          |-----+-------+----------+-----------------------------------|
          | HS  |  Red  |   Off    |   Modem is operating at 300bps    |
          |-----+-------+----------+-----------------------------------|
          | AA  |  Red  |    On    |        Auto-answer enabled        |
          |-----+-------+----------+-----------------------------------|
          | AA  |  Red  |   Off    |       Auto-answer disabled        |
          |-----+-------+----------+-----------------------------------|
          | CD  |  Red  |    On    |      Carrier signal detected      |
          |-----+-------+----------+-----------------------------------|
          | CD  |  Red  |   Off    |    Carrier signal not detected    |
          |-----+-------+----------+-----------------------------------|
          | OH  |  Red  |    On    |         Modem is off-hook         |
          |-----+-------+----------+-----------------------------------|
          | OH  |  Red  |   Off    |         Modem is on-hook          |
          |-----+-------+----------+-----------------------------------|
          | RD  |  Red  | Blinking |      Modem is receiving data      |
          |-----+-------+----------+-----------------------------------|
          | RD  |  Red  |   Off    |    Modem is not receiving data    |
          |-----+-------+----------+-----------------------------------|
          | TD  |  Red  | Blinking |    Modem is transmitting data     |
          |-----+-------+----------+-----------------------------------|
          | TD  |  Red  |   Off    |  Modem is not transmitting data   |
          |-----+-------+----------+-----------------------------------|
          | TR  |  Red  |    On    |        DTR signal is high         |
          |-----+-------+----------+-----------------------------------|
          | TR  |  Red  |   Off    |         DTR signal is low         |
          |-----+-------+----------+-----------------------------------|
          | MR  |  Red  |    On    |            Power is on            |
          |-----+-------+----------+-----------------------------------|
          | MR  |  Red  |   Off    |           Power is off            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                SUPPORTED STANDARD COMMANDS                 |
          |------------------------------------------------------------|
          |                     Basic AT Commands                      |
          |------------------------------------------------------------|
          | +++, ‘comma’, A/                                           |
          |------------------------------------------------------------|
          | A, B, E, F, H, L, M, O, Q, V, X, Y, Z                      |
          |------------------------------------------------------------|
          | &C, &D, &G, &L, &P, &T                                     |
          |------------------------------------------------------------|
          |                        S-Registers                         |
          |------------------------------------------------------------|
          | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12,     |
          | S14, S18, S21, S22, S23, S27                               |
          |------------------------------------------------------------|
          |      Note: See MHI help file for complete information.     |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                   TRANSMIT EQUALIZATION                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Un [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Selects how much transmit equalization the  |
          |              | modem will use.                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      U0      | Modem will use the average amount of        |
          |              | transmit equalization.                      |
          |--------------+---------------------------------------------|
          |      U1      | Modem will use the maximum amount of        |
          |              | transmit equalization.                      |
          |--------------+---------------------------------------------|
          |     í U2     | Modem auto-detects correct amount of        |
          |              | transmit equalization during handshaking.   |
          +------------------------------------------------------------+
       
         See EVEREX SYSTEMS, INC EMAC-MD2400 (EV-945) for a full command
                                     summary.