E-TECH RESEARCH, INC.
=====================

   UFOMATE P1496MX (REV. 1)

   Card Type              Modem(asynchronous)                     
   Chip Set               Unidentified                            
   Maximum Data Rate      14.4Kbps                                
   Maximum Fax Rate       9600bps                                 
   Data Bus               External                                
   Fax Class              Class I & II                            
   Data Modulation        Bell 103A/212A                          
   Protocol                                                       
                          ITU-T V.21, V.22, V.22bis, V.23, V.32,  
                          V.32bis                                 
   Fax Modulation         ITU-T V.21CH2, V.27ter, V.29            
   Protocol               
   Error                  MNP5, V.42, V.42bis                     
   Correction/Compression 

<gopher://bitreich.org/I/th99/t/E-H/51797-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function        | Label  |   Function    |   Label   |
   |------------------------------------------------------------|
   | Line in                   |   CN1    | Power in     | CN4  |
   |---------------------------+----------+--------------+------|
   | Line out                  |   CN2    | Power switch | SW1  |
   |---------------------------+----------+--------------+------|
   | RS-232/422                |   CN3    |              |      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED | Color | Status |              Condition              |
   |-----+-------+--------+-------------------------------------|
   | TXD |  Red  |   On   |     Modem is transmitting data      |
   |-----+-------+--------+-------------------------------------|
   | TXD |  Red  |  Off   |   Modem is not transmitting data    |
   |-----+-------+--------+-------------------------------------|
   | RXD |  Red  |   On   |       Modem is receiving data       |
   |-----+-------+--------+-------------------------------------|
   | RXD |  Red  |  Off   |     Modem is not receiving data     |
   |-----+-------+--------+-------------------------------------|
   | DCD |  Red  |   On   |       Carrier signal detected       |
   |-----+-------+--------+-------------------------------------|
   | DCD |  Red  |  Off   |     Carrier signal not detected     |
   |-----+-------+--------+-------------------------------------|
   | LB  |  Red  |   On   |  Battery is low (ten minutes power  |
   |     |       |        |             remaining)              |
   |-----+-------+--------+-------------------------------------|
   | LB  |  Red  |  Off   |          Normal operation           |
   +------------------------------------------------------------+

                     Proprietary AT Command Set

   +------------------------------------------------------------+
   |                  BIT-MAPPED REGISTER S14                   |
   |------------------------------------------------------------|
   | Format:        | AT [cmds] S14=n [cmds]                    |
   |----------------+-------------------------------------------|
   | Default:       | Read only                                 |
   |----------------+-------------------------------------------|
   | Range:         | 0 - 255                                   |
   |----------------+-------------------------------------------|
   | Description:   | Displays echo canceler, answer/originate, |
   |                | remote digital loopback, dial interrupt,  |
   |                | buffer size                               |
   |------------------------------------------------------------|
   |   Bit   | Value  |                Function                 |
   |---------+--------+-----------------------------------------|
   |    0    |      0 | Not used                                |
   |------------------------------------------------------------|
   |      1      |    0 | Standard canceler enabled             |
   |             |      |                                       |
   |             |    1 | Long canceler for round trip delays   |
   |             |      | of over 36.833ms enabled              |
   |-------------+------+---------------------------------------|
   |      2      |    0 | Answer mode                           |
   |             |      |                                       |
   |             |    1 | Originate mode                        |
   |-------------+------+---------------------------------------|
   |      3      |    0 | Remotely requested remote digital     |
   |             |      | loopback disabled                     |
   |             |    1 |                                       |
   |             |      | Remotely requested remote digital     |
   |             |      | loopback enabled                      |
   |-------------+------+---------------------------------------|
   |      4      |    0 | Not used                              |
   |-------------+------+---------------------------------------|
   |      5      |    0 | Dial interrupt disabled               |
   |             |      |                                       |
   |             |    1 | Dial interrupt enabled                |
   |-------------+------+---------------------------------------|
   |      6      |    0 | Normal (2.2K)buffer size              |
   |             |      |                                       |
   |             |    1 | Small (1.5K)buffer                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BIT-MAPPED REGISTER S21                   |
   |------------------------------------------------------------|
   | Format:          | AT [cmds] S21=n [cmds]                  |
   |------------------+-----------------------------------------|
   | Default:         | 0                                       |
   |------------------+-----------------------------------------|
   | Range:           | 0 - 255                                 |
   |------------------+-----------------------------------------|
   | Description:     | Controls speed conversion and flow      |
   |                  | control                                 |
   |------------------------------------------------------------|
   |   Bit   |   Value    |              Function               |
   |------------------------------------------------------------|
   |  3. 2, 1, 0  |    i 0000 | Speed conversion enabled        |
   |              |           |                                 |
   |              |      0001 | Speed conversion disabled       |
   |              |           |                                 |
   |              |      0010 | Speed conversion disabled       |
   |              |           |                                 |
   |              |      0011 | Speed conversion disabled       |
   |              |           |                                 |
   |              |      0100 | Speed conversion disabled       |
   |              |           |                                 |
   |              |      0101 | Speed conversion disabled       |
   |              |           |                                 |
   |              |      0110 | Speed conversion disabled       |
   |              |           |                                 |
   |              |      0111 | Speed conversion disabled       |
   |              |           |                                 |
   |              |      1000 | Speed conversion disabled       |
   |--------------+-----------+---------------------------------|
   |  7, 6, 5, 4  |    i 0000 | XON/XOFF enabled                |
   |              |           |                                 |
   |              |      0001 | XON/XOFF passthrough enabled    |
   |              |           |                                 |
   |              |      0010 | ENQ/ACK enabled                 |
   |              |           |                                 |
   |              |      0011 | DTR/DSR enabled                 |
   |              |           |                                 |
   |              |      0100 | CTS/RTS enabled                 |
   |              |           |                                 |
   |              |      0101 | Flow control disabled           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BIT-MAPPED REGISTER S22                   |
   |------------------------------------------------------------|
   | Format:          | AT [cmds] S22=n [cmds]                  |
   |------------------+-----------------------------------------|
   | Default:         | 4                                       |
   |------------------+-----------------------------------------|
   | Range:           | 0 - 255                                 |
   |------------------+-----------------------------------------|
   | Description:     | Controls speaker and extended result    |
   |                  | codes                                   |
   |------------------------------------------------------------|
   |   Bit    |  Value   |               Function               |
   |------------------------------------------------------------|
   |  3, 2, 1, 0   | 0000 | Disabled                            |
   |               |      |                                     |
   |               | 0001 | Enable extended result codes        |
   |               |      |                                     |
   |               | 0010 | Enable extended result codes and    |
   |               |      | dial tone detect                    |
   |               | 0011 |                                     |
   |               |      | Enable extended result codes and    |
   |               |    i | busy signal detect                  |
   |               | 0100 |                                     |
   |               |      | Enable dial tone detect and busy    |
   |               |      | signal detect                       |
   |---------------+------+-------------------------------------|
   |  7, 6, 5, 4   | 0000 | Speaker disabled                    |
   |               |      |                                     |
   |               | 0001 | Speaker disabled until DCD high     |
   |               |      |                                     |
   |               | 0010 | Speaker enabled                     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BIT-MAPPED REGISTER S23                   |
   |------------------------------------------------------------|
   | Format:          | AT [cmds] S23=n [cmds]                  |
   |------------------+-----------------------------------------|
   | Default:         | 0                                       |
   |------------------+-----------------------------------------|
   | Range:           | 0 -255                                  |
   |------------------+-----------------------------------------|
   | Description:     | Controls test options, serial port      |
   |                  | speed, parity and guard tone            |
   |------------------------------------------------------------|
   |   Bit    |   Value    |              Function              |
   |------------------------------------------------------------|
   |  7, 6, 5, 4   |    0000 | Guard tone disabled              |
   |               |         |                                  |
   |               |    0001 | 550Hz guard tone enabled         |
   |               |         |                                  |
   |               |    0010 | 1800Hz guard tone enabled        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BIT-MAPPED REGISTER S28                   |
   |------------------------------------------------------------|
   | Format:           | AT [cmds] S28=n [cmds]                 |
   |-------------------+----------------------------------------|
   | Default:          | 49                                     |
   |-------------------+----------------------------------------|
   | Range:            | 0 - 255                                |
   |-------------------+----------------------------------------|
   | Description:      | Controls speaker and error correction  |
   |------------------------------------------------------------|
   |    Bit     | Value  |               Function               |
   |------------+--------+--------------------------------------|
   | 3, 2, 1, 0 |   0000 | Speaker disabled                     |
   |            |        |                                      |
   |            | i 0001 | Speaker disabled until DCD high      |
   |            |        |                                      |
   |            |   0010 | Speaker enabled                      |
   |            |        |                                      |
   |            |   0011 | Speaker while dialing until DCD high |
   |------------------------------------------------------------|
   |   7, 6, 5, 4   |           0000 | Normal mode              |
   |                |                |                          |
   |                |           0001 | Auto MNP mode            |
   |                |                |                          |
   |                |           0010 | MNP mode                 |
   |                |                |                          |
   |                |         i 0011 | Auto V.42 mode           |
   |                |                |                          |
   |                |           0100 | LAPM mode                |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BIT-MAPPED REGISTER S29                   |
   |------------------------------------------------------------|
   | Format:           | AT [cmds] S29=n [cmds]                 |
   |-------------------+----------------------------------------|
   | Default:          | 0                                      |
   |-------------------+----------------------------------------|
   | Range:            | 0 - 255                                |
   |-------------------+----------------------------------------|
   | Description:      | Controls DTR and carrier control       |
   |------------------------------------------------------------|
   |    Bit     | Value  |               Function               |
   |------------+--------+--------------------------------------|
   | 3, 2, 1, 0 |   0000 | DTR ignored                          |
   |            |        |                                      |
   |            |   0001 | Escape command state on low DTR,     |
   |            |        | remain off hook                      |
   |            |   0010 |                                      |
   |            |        | Go on hook and auto answer disabled  |
   |            |   0011 |                                      |
   |            |        | Reset on low DTR                     |
   |------------------------------------------------------------|
   |   7, 6, 5, 4   |   0000 | DCD forced high                  |
   |                |        |                                  |
   |                |   0001 | DCD follows remote modem         |
   |                |        |                                  |
   |                |   0010 | Conforms to Computer Systems     |
   |                |        | Interface                        |
   |                |   0011 |                                  |
   |                |        | Conforms to Port Contender       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        BUFFER SIZE                         |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $Bn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls buffer size                        |
   |------------------------------------------------------------|
   |    Command     |                 Function                  |
   |----------------+-------------------------------------------|
   |     i $B0      | Normal buffer size (2.2K)                 |
   |----------------+-------------------------------------------|
   |      $B1       | Reduce buffer size to 1.5K                |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                          CANCELER                          |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $An [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls echo canceler length               |
   |------------------------------------------------------------|
   |    Command    |                  Function                  |
   |---------------+--------------------------------------------|
   |      $A0      | Standard canceler enabled                  |
   |---------------+--------------------------------------------|
   |     i $A1     | Long canceler for round trip delays of     |
   |               | over 36.833ms enabled                      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       CARRIER DETECT                       |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] &Cn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls DCD, Computer Systems Interface    |
   |              | and Port Contender                          |
   |------------------------------------------------------------|
   |    Command    |                  Function                  |
   |---------------+--------------------------------------------|
   |     i &C0     | DCD forced high                            |
   |---------------+--------------------------------------------|
   |      &C1      | DCD follows remote modem                   |
   |---------------+--------------------------------------------|
   |      &C2      | Conforms to Computer Systems Interface     |
   |---------------+--------------------------------------------|
   |      &C3      | Conforms to Port Contender                 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        COMPRESSION                         |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $Cn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls data compression                   |
   |------------------------------------------------------------|
   |    Command     |                 Function                  |
   |----------------+-------------------------------------------|
   |      $C0       | Data compression disabled                 |
   |----------------+-------------------------------------------|
   |     i $C1      | Data compression enabled                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CONNECT/SPEED MESSAGE                    |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $Xn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls connect and speed message          |
   |              | displayed                                   |
   |------------------------------------------------------------|
   |    Command    |                  Function                  |
   |---------------+--------------------------------------------|
   |      $X0      | Normal connect and DCE speed message       |
   |               | enabled                                    |
   |---------------+--------------------------------------------|
   |      $X1      | Normal connect and DTE speed message       |
   |               | enabled                                    |
   |---------------+--------------------------------------------|
   |     i $X2     | Extended connect and DCE speed message     |
   |               | enabled                                    |
   |---------------+--------------------------------------------|
   |      $X3      | Extended connect and DTE speed message     |
   |               | enabled                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       DIAL INTERRUPT                       |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $Kn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls dial interrupt                     |
   |------------------------------------------------------------|
   |    Command     |                 Function                  |
   |----------------+-------------------------------------------|
   |      $K0       | Dial interrupt disabled                   |
   |----------------+-------------------------------------------|
   |     i $K1      | Dial interrupt enabled                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DISPLAY STORED INFORMATION                 |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] &Vn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Displays stored phone numbers,              |
   |              | configuration profiles and S registers      |
   |------------------------------------------------------------|
   |    Command    |                  Function                  |
   |---------------+--------------------------------------------|
   |      &V0      | Display stored phone numbers               |
   |---------------+--------------------------------------------|
   |      &V1      | Display current configuration profiles     |
   |---------------+--------------------------------------------|
   |      &V2      | Display contents of S registers            |
   |---------------+--------------------------------------------|
   |      &V3      | Display stored profiles briefly            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         DSR SIGNAL                         |
   |------------------------------------------------------------|
   | Format:          | AT [cmds] S27=n [cmds]                  |
   |------------------+-----------------------------------------|
   | Default:         | 0                                       |
   |------------------+-----------------------------------------|
   | Range:           | 0 - 255                                 |
   |------------------+-----------------------------------------|
   | Description:     | Controls DSR signal                     |
   |------------------------------------------------------------|
   |   Bit    |  Value  |               Function                |
   |------------------------------------------------------------|
   |      7       |    i | DSR forced high                      |
   |              | 0000 |                                      |
   |              |      | DSR follows remote modem             |
   |              | 0001 |                                      |
   |              |      | Conforms to Computer Systems         |
   |              | 0010 | Interface                            |
   |              |      |                                      |
   |              | 0011 | Conforms to Port Contender           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        EQUALIZATION                        |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $Qn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls compromise equalization            |
   |------------------------------------------------------------|
   |       Command        |              Function               |
   |----------------------+-------------------------------------|
   |         $Q0          | 0dB equalization                    |
   |----------------------+-------------------------------------|
   |         $Q1          | 2dB equalization                    |
   |----------------------+-------------------------------------|
   |        i $Q2         | 4dB equalization                    |
   |----------------------+-------------------------------------|
   |         $Q3          | 6dB equalization                    |
   |----------------------+-------------------------------------|
   |         $Q4          | 8dB equalization                    |
   |----------------------+-------------------------------------|
   |         $Q5          | 10dB equalization                   |
   |----------------------+-------------------------------------|
   |         $Q6          | 12dB equalization                   |
   |----------------------+-------------------------------------|
   |         $Q7          | 14dB equalization                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        FLOW CONTROL                        |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $Fn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls XON/XOFF, ENQ/ACK, DTR/DSR and     |
   |              | CTS/RTS flow control                        |
   |------------------------------------------------------------|
   |      Command       |               Function                |
   |--------------------+---------------------------------------|
   |        $F0         | XON/XOFF enabled                      |
   |--------------------+---------------------------------------|
   |        $F1         | XON/XOFF passthrough enabled          |
   |--------------------+---------------------------------------|
   |        $F2         | ENQ/ACK enabled                       |
   |--------------------+---------------------------------------|
   |        $F3         | DTR/DSR enabled                       |
   |--------------------+---------------------------------------|
   |       i $F4        | CTS/RTS enabled                       |
   |--------------------+---------------------------------------|
   |        $F5         | Flow control disabled                 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      INACTIVITY TIMER                      |
   |------------------------------------------------------------|
   | Type        | Configuration                                |
   |-------------+----------------------------------------------|
   | Format      | AT [cmds] S36=n [cmds]                       |
   |-------------+----------------------------------------------|
   | Default     | 0                                            |
   |-------------+----------------------------------------------|
   | Range       | 0 - 255                                      |
   |-------------+----------------------------------------------|
   | Unit        | 1 minute                                     |
   |-------------+----------------------------------------------|
   | Description | Sets length of time the modem waits before   |
   |             | disconnect if no data sent or received       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         LINE SPEED                         |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] S37=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Description: | Controls speed at which modem attempts to   |
   |              | connect                                     |
   |------------------------------------------------------------|
   |    Command    |                  Function                  |
   |---------------+--------------------------------------------|
   |    i S37=0    | Line speed follows DTE speed. If DTE is    |
   |               | over 9600bps, attempt connect at 14.4Kbps  |
   |---------------+--------------------------------------------|
   |     S37=1     | Connect at V.23 75/1200bps                 |
   |---------------+--------------------------------------------|
   |     S37=2     | Not used                                   |
   |---------------+--------------------------------------------|
   |     S37=3     | Connect at 300bps                          |
   |---------------+--------------------------------------------|
   |     S37=4     | Not used                                   |
   |---------------+--------------------------------------------|
   |     S37=5     | Connect at 1200bps                         |
   |---------------+--------------------------------------------|
   |     S37=6     | Connect at 2400bps                         |
   |---------------+--------------------------------------------|
   |     S37=7     | Connect at 4800bps                         |
   |---------------+--------------------------------------------|
   |     S37=8     | Not used                                   |
   |---------------+--------------------------------------------|
   |     S37=9     | Connect at 9600bps                         |
   |---------------+--------------------------------------------|
   |    S37=10     | Not used                                   |
   |---------------+--------------------------------------------|
   |    S37=11     | Not used                                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         LINE SPEED                         |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] &Ln [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls speed at which modem attempts to   |
   |              | connect                                     |
   |------------------------------------------------------------|
   |    Command    |                  Function                  |
   |---------------+--------------------------------------------|
   |     i &L0     | Line speed follows DTE speed. If DTE is    |
   |               | over 9600bps, attempt connect at 14.4Kbps  |
   |---------------+--------------------------------------------|
   |      &L1      | Connect at V.23 75/1200bps                 |
   |---------------+--------------------------------------------|
   |      &L2      | Not used                                   |
   |---------------+--------------------------------------------|
   |      &L3      | Connect at 300bps                          |
   |---------------+--------------------------------------------|
   |      &L4      | Not used                                   |
   |---------------+--------------------------------------------|
   |      &L5      | Connect at 1200bps                         |
   |---------------+--------------------------------------------|
   |      &L6      | Connect at 2400bps                         |
   |---------------+--------------------------------------------|
   |      &L7      | Connect at 4800bps                         |
   |---------------+--------------------------------------------|
   |      &L8      | Not used                                   |
   |---------------+--------------------------------------------|
   |      &L9      | Connect at 9600bps                         |
   |---------------+--------------------------------------------|
   |     &L10      | Not used                                   |
   |---------------+--------------------------------------------|
   |     &L11      | Not used                                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                           PARITY                           |
   |------------------------------------------------------------|
   | Format:        | AT [cmds] S30=n [cmds]                    |
   |----------------+-------------------------------------------|
   | Default:       | 0                                         |
   |----------------+-------------------------------------------|
   | Range:         | 0 - 255                                   |
   |----------------+-------------------------------------------|
   | Description:   | Controls parity                           |
   |------------------------------------------------------------|
   |   Bit   |  Value   |               Function                |
   |------------------------------------------------------------|
   |    1, 0     |       00 | Parity even                       |
   |             |          |                                   |
   |             |       01 | Parity space                      |
   |             |          |                                   |
   |             |       10 | Parity odd                        |
   |             |          |                                   |
   |             |       11 | Parity null                       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                          PROTOCOL                          |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $En [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls protocol used                      |
   |------------------------------------------------------------|
   |      Command      |                Function                |
   |-------------------+----------------------------------------|
   |        $E0        | Normal mode                            |
   |-------------------+----------------------------------------|
   |        $E1        | Auto MNP mode                          |
   |-------------------+----------------------------------------|
   |        $E2        | MNP mode                               |
   |-------------------+----------------------------------------|
   |       i $E3       | Auto V.42 mode                         |
   |-------------------+----------------------------------------|
   |        $E4        | LAPM mode                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                          RETRAIN                           |
   |------------------------------------------------------------|
   | Format:          | AT [cmds] S15=n [cmds]                  |
   |------------------+-----------------------------------------|
   | Default:         | 5                                       |
   |------------------+-----------------------------------------|
   | Range:           | 0 -255                                  |
   |------------------+-----------------------------------------|
   | Description:     | Controls number of retrains per minute  |
   |                  | allowed                                 |
   |------------------------------------------------------------|
   |    Bit    |  Value  |               Function               |
   |-----------+---------+--------------------------------------|
   | 3, 2, 1,  |    0000 | Not used                             |
   |     0     |         |                                      |
   |------------------------------------------------------------|
   |  7, 6, 5, 4   |    i | Disconnect If more than four        |
   |               | 0000 | retrain attempts in three minutes   |
   |               |      |                                     |
   |               | 0001 | Disconnect If more than four        |
   |               |      | retrain attempts in four minutes    |
   |               | 0010 |                                     |
   |               |      | Disconnect If more than four        |
   |               | 0011 | retrain attempts in five minutes    |
   |               |      |                                     |
   |               | 0100 | Unlimited retrain allowed           |
   |               |      |                                     |
   |               |      | Retrain disabled                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       RETRAIN LIMIT                        |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] &En [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls number of retrains per minute      |
   |              | allowed                                     |
   |------------------------------------------------------------|
   |    Command     |                 Function                  |
   |----------------+-------------------------------------------|
   |     i &E0      | Disconnect If more than four retrain      |
   |                | attempts in three minutes                 |
   |----------------+-------------------------------------------|
   |      &E1       | Disconnect If more than four retrain      |
   |                | attempts in four minutes                  |
   |----------------+-------------------------------------------|
   |      &E2       | Disconnect If more than four retrain      |
   |                | attempts in five minutes                  |
   |----------------+-------------------------------------------|
   |      &E3       | Unlimited retrain allowed                 |
   |----------------+-------------------------------------------|
   |      &E4       | Retrain disabled                          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      SPEED CONVERSION                      |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $Sn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls speed conversion                   |
   |------------------------------------------------------------|
   |    Command     |                 Function                  |
   |----------------+-------------------------------------------|
   |      $S0       | Speed conversion enabled                  |
   |----------------+-------------------------------------------|
   |  i $S1 - $S8   | Speed conversion disabled                 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        TEST STATUS                         |
   |------------------------------------------------------------|
   | Format       | AT [cmds] S16=n [cmds]                      |
   |--------------+---------------------------------------------|
   | Default:     | Read-only                                   |
   |--------------+---------------------------------------------|
   | Range:       | 0 - 255                                     |
   |--------------+---------------------------------------------|
   | Unit:        | Bit-mapped                                  |
   |--------------+---------------------------------------------|
   | Description: | Contains status of loopback tests           |
   |--------------+---------------------------------------------|
   | Bit  | Value |                  Function                   |
   |------+-------+---------------------------------------------|
   |  0   |     0 | Local analog loopback test disabled         |
   |      |       |                                             |
   |      |     1 | Local analog loopback test enabled          |
   |------+-------+---------------------------------------------|
   |  1   |     0 | Not used                                    |
   |------+-------+---------------------------------------------|
   |  2   |     0 | Local digital loopback test disabled        |
   |      |       |                                             |
   |      |     1 | Local digital loopback test enabled         |
   |------+-------+---------------------------------------------|
   |  3   |     0 | Remotely requested remote digital loopback  |
   |      |       | enabled                                     |
   |      |     1 |                                             |
   |      |       | Remotely requested remote digital loopback  |
   |      |       | disabled                                    |
   |------+-------+---------------------------------------------|
   |  4   |     0 | Locally requested remote digital loopback   |
   |      |       | test not in progress                        |
   |      |     1 |                                             |
   |      |       | Locally requested remote digital loopback   |
   |      |       | test in progress                            |
   |------+-------+---------------------------------------------|
   |  5   |     0 | Remote digital loopback with local          |
   |      |       | self-test disabled                          |
   |      |     1 |                                             |
   |      |       | Remote digital loopback with local          |
   |      |       | self-test enabled                           |
   |------+-------+---------------------------------------------|
   |  6   |     0 | Local analog loopback with local self-test  |
   |      |       | disabled                                    |
   |      |     1 |                                             |
   |      |       | Local analog loopback with local self-test  |
   |      |       | enabled                                     |
   |------+-------+---------------------------------------------|
   |  7   |     0 | Not used                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     TRANSMISSION LEVEL                     |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $Tn [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Controls transmission level                 |
   |------------------------------------------------------------|
   |         Command         |             Function             |
   |-------------------------+----------------------------------|
   |        $T0 - $T2        | -4dBm                            |
   |-------------------------+----------------------------------|
   |           $T3           | -6dBm                            |
   |-------------------------+----------------------------------|
   |           $T4           | -8dBm                            |
   |-------------------------+----------------------------------|
   |          i $T5          | -10dBm                           |
   |-------------------------+----------------------------------|
   |           $T6           | -12dBm                           |
   |-------------------------+----------------------------------|
   |           $T7           | -14dBm                           |
   |-------------------------+----------------------------------|
   |           $T8           | -16dBm                           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       V.42bis TIMER                        |
   |------------------------------------------------------------|
   | Type        | Configuration                                |
   |-------------+----------------------------------------------|
   | Format      | AT [cmds] S24=n [cmds]                       |
   |-------------+----------------------------------------------|
   | Default     | 75                                           |
   |-------------+----------------------------------------------|
   | Range       | 0 - 255                                      |
   |-------------+----------------------------------------------|
   | Unit        | Unidentified                                 |
   |-------------+----------------------------------------------|
   | Description | Sets the time the modem waits for V.42bis    |
   |             | parameter negotiation before fallback to MNP |
   |             | or normal mode                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     BITS PER CHARACTER                     |
   |------------------------------------------------------------|
   | Type:        | Configuration                               |
   |--------------+---------------------------------------------|
   | Format:      | AT [cmds] $Ln [cmds]                        |
   |--------------+---------------------------------------------|
   | Description: | Sets character length while in data mode    |
   |------------------------------------------------------------|
   |        Command        |              Function              |
   |-----------------------+------------------------------------|
   |          $L0          | Not used                           |
   |-----------------------+------------------------------------|
   |          $L1          | 6 data bits, 1 stop bit            |
   |-----------------------+------------------------------------|
   |          $L2          | 7 data bits, 1 stop bit            |
   |-----------------------+------------------------------------|
   |         i $L3         | 8 data bits, 1 stop bit            |
   |-----------------------+------------------------------------|
   |          $L4          | 5 data bits, 2 stop bits           |
   |-----------------------+------------------------------------|
   |          $L5          | 6 data bits, 2 stop bits           |
   |-----------------------+------------------------------------|
   |          $L6          | 7 data bits, 2 stop bits           |
   |-----------------------+------------------------------------|
   |          $L7          | 8 data bits, 2 stop bits           |
   +------------------------------------------------------------+