MAXTECH CORPORATION
===================

   GM144E

   Modem Type                 Data (synchronous/asynchronous)/Fax 
   Maximum Data Rate          14.4Kbps                            
   Maximum Fax Rate           14.4Kbps                            
   Data Bus                   External                            
   Fax Class                  Class I & II                        
   Data Modulation Protocol   Bell 103A/212A                      
                                                                  
                              ITU-T V.22, V.22bis, V.32, V.32bis  
   Fax Modulation Protocol    ITU-T V.17, V.21CH2, V.27ter, V.29  
   Error                      MNP 5, V.42, V.42bis                
   Correction/Compression     

<gopher://bitreich.org/I/th99/t/M-O/51281-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Purpose      | Location |      Purpose      | Location |
   |------------------+----------+-------------------+----------|
   | Line out         |   CN1    | DC power          |   CN4    |
   |------------------+----------+-------------------+----------|
   | Line in          |   CN2    | Power switch      |   SW1    |
   |------------------+----------+-------------------+----------|
   | RS-232/422       |   CN3    |                   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED | Color |  Status  |             Condition             |
   |-----+-------+----------+-----------------------------------|
   | TST |  Red  |    On    |         Normal operation          |
   |-----+-------+----------+-----------------------------------|
   | TST |  Red  |  Flash   | Modem has detected and corrected  |
   |     |       |          |               error               |
   |-----+-------+----------+-----------------------------------|
   | HS  |  Red  |    On    | Modem is operating at 4800bps or  |
   |     |       |          |              faster               |
   |-----+-------+----------+-----------------------------------|
   | HS  |  Red  |   Off    | Modem is operating at slower than |
   |     |       |          |              4800bps              |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  |    On    |        Auto-answer enabled        |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  |   Off    |       Auto-answer disabled        |
   |-----+-------+----------+-----------------------------------|
   | AA  |  Red  | Blinking |         Phone is ringing          |
   |-----+-------+----------+-----------------------------------|
   | 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  |    On    |      Modem is receiving data      |
   |-----+-------+----------+-----------------------------------|
   | RD  |  Red  |   Off    |    Modem is not receiving data    |
   |-----+-------+----------+-----------------------------------|
   | SD  |  Red  |    On    |    Modem is transmitting data     |
   |-----+-------+----------+-----------------------------------|
   | SD  |  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            |
   +------------------------------------------------------------+

                     Proprietary AT Command Set

   +------------------------------------------------------------+
   |          AUTO-RELIABLE TIME BUFFER CONFIGURATION           |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $An [cmds]                        |
   |--------------+---------------------------------------------|
   | Example:     | AT $A1 &W<CR>                               |
   |--------------+---------------------------------------------|
   | Description: | Controls the handling of incoming data      |
   |              | during auto-reliable time period.           |
   |--------------+---------------------------------------------|
   |  i Command   |                  Function                   |
   |--------------+---------------------------------------------|
   |>> $A0        | Data is discarded.                          |
   |--------------+---------------------------------------------|
   |    i $A1     | Data is buffered.                           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CALLBACK ATTEMPTS                      |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] S16=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Example:     | ATS16=6<CR>                                 |
   |--------------+---------------------------------------------|
   | Default:     | 4                                           |
   |--------------+---------------------------------------------|
   | Range:       | 1-255                                       |
   |--------------+---------------------------------------------|
   | Unit:        | 1 attempt                                   |
   |--------------+---------------------------------------------|
   | Description: | Sets the maximum number of login attempts   |
   |              | after initial callback connection.          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  FAILED PASSWORD ATTEMPTS                  |
   |------------------------------------------------------------|
   | Type:        | Register                                    |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] S26?                              |
   |--------------+---------------------------------------------|
   | Example:     | ATS26?<CR>                                  |
   |--------------+---------------------------------------------|
   | Default:     | Read-only                                   |
   |--------------+---------------------------------------------|
   | Range:       | 0-255                                       |
   |--------------+---------------------------------------------|
   | Unit:        | 1 attempt                                   |
   |--------------+---------------------------------------------|
   | Description: | This register stores the number of failed   |
   |              | password attempts.                          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      DISTINCTIVE RING                      |
   |------------------------------------------------------------|
   | Format          | AT [cmds] S101=n [cmds]                  |
   |-----------------+------------------------------------------|
   | Example:        | ATS101=40<CR>                            |
   |-----------------+------------------------------------------|
   | Default:        | 0                                        |
   |-----------------+------------------------------------------|
   | Range:          | 0 - 255                                  |
   |-----------------+------------------------------------------|
   | Unit:           | Bit-mapped                               |
   |-----------------+------------------------------------------|
   | Description:    |                                          |
   |------------------------------------------------------------|
   |   Bit    | i Value |               Function                |
   |----------+---------+---------------------------------------|
   |    0     |>> 0     | Do not respond to ring type A.        |
   |          |         |                                       |
   |          |   i 1   | Respond to ring type A.               |
   |----------+---------+---------------------------------------|
   |    1     |   i 0   | Not used.                             |
   |----------+---------+---------------------------------------|
   |    2     |>> 0     | Do not respond to ring type C.        |
   |          |         |                                       |
   |          |   i 1   | Respond to ring type C.               |
   |----------+---------+---------------------------------------|
   |    3     |>> 0     | Do not respond to ring type D.        |
   |          |         |                                       |
   |          |   i 1   | Respond to ring type D.               |
   |----------+---------+---------------------------------------|
   |    4     |>> 0     | Do not respond to ring type E.        |
   |          |         |                                       |
   |          |   i 1   | Respond to ring type E.               |
   |----------+---------+---------------------------------------|
   |    5     |   i 0   | Not used.                             |
   |----------+---------+---------------------------------------|
   |    6     |>> 0     | Do not respond to ring type G.        |
   |          |         |                                       |
   |          |   i 1   | Respond to ring type G.               |
   |----------+---------+---------------------------------------|
   |    7     |>> 0     | Report RING for all ring types.       |
   |          |         |                                       |
   |          |   i 1   | Report RING n where n is the ring     |
   |          |         | type.                                 |
   +------------------------------------------------------------+