(TXT) View Source
       
       # WESTERN DATACOM
       
          CRYPTOCOM V.32BIS/V.34
       
          Card Type              Fax, Modem (asynchronous)               
          Chip Set               Unidentified                            
          Maximum Data Rate      28.8Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Bus               External                                
          Fax Class              Class I & II                            
          Data Modulation        Bell 103/212A                           
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.23, V.25,  
                                 V.25bis, V.32, V.32bis. V.34            
          Fax Modulation         ITU-T V.17, V.21CH2, V.27ter, V.29      
          Protocol               
          Error                  MNP5, MNP10                             
          Correction/Compression 
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        |  Label   |   Function   |  Label  |
          |------------------------------------------------------------|
          | Line out                    |    CN1     | DC power | CN3  |
          |-----------------------------+------------+----------+------|
          | RS-232/422                  |    CN2     |          |      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |  LED  | Color  | Status |            Condition             |
          |-------+--------+--------+----------------------------------|
          | LED 1 | Yellow |   On   |           Power is on            |
          |-------+--------+--------+----------------------------------|
          | LED 1 | Yellow |  Off   |           Power is off           |
          |-------+--------+--------+----------------------------------|
          | LED 2 |  Red   |   On   |           Battery low            |
          |-------+--------+--------+----------------------------------|
          | LED 2 |  Red   |  Off   |           Batter full            |
          |-------+--------+--------+----------------------------------|
          | LED 3 | Yellow |   On   |     Encryption mode enabled      |
          |-------+--------+--------+----------------------------------|
          | LED 3 | Yellow |  Off   |     Encryption mode disabled     |
          |-------+--------+--------+----------------------------------|
          | LED 4 | Yellow |   On   |      Cellular mode enabled       |
          |-------+--------+--------+----------------------------------|
          | LED 4 | Yellow |  Off   |      Cellular mode disabled      |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |         AUTO-RETRAIN - AUTO-FALLBACK/FALL-FORWARD          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %En [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls auto-retrain mode and              |
          |              | fallback/fall-forward                       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %E0      | Auto-retrain disabled                       |
          |--------------+---------------------------------------------|
          |     %E1      | Auto-retrain enabled                        |
          |--------------+---------------------------------------------|
          |     %E2      | Auto-fallback/fall-forward enabled          |
          |--------------+---------------------------------------------|
          |     %E3      | Both auto-retrain and                       |
          |              | auto-fallback/fall-forward enabled          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S14                   |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S14=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 138                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-174                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls echo, result codes and display,    |
          |              | dial mode, and answer/originate mode.       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  1   |     0 | Command echo disabled                       |
          |      |       |                                             |
          |      |   í 1 | Command echo enabled                        |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Result codes enabled                        |
          |      |       |                                             |
          |      |     1 | Result codes disabled                       |
          |------+-------+---------------------------------------------|
          |  3   |     0 | Display result codes in numeric format      |
          |      |       |                                             |
          |      |   í 1 | Display result codes in verbose format      |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Tone dial enabled                           |
          |      |       |                                             |
          |      |     1 | Pulse dial enabled                          |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Answer mode enabled                         |
          |      |       |                                             |
          |      |   í 1 | Originate mode enabled                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S21                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S21=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 112                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-248                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects low DTR action, DCD/DSR signals,    |
          |              | and the long space disconnect function.     |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 2 -  | í 000 | Not used                                    |
          |  0   |       |                                             |
          |------+-------+---------------------------------------------|
          | 4, 3 |    00 | DTR signal ignored                          |
          |      |       |                                             |
          |      |    01 | Modem goes to command mode on low DTR       |
          |      |       |                                             |
          |      |  í 10 | Modem disconnects on low DTR; Auto-Answer   |
          |      |       | is disabled.                                |
          |      |    11 |                                             |
          |      |       | Modem is initialized on low DTR             |
          |------+-------+---------------------------------------------|
          |  5   |     0 | DCD forced high                             |
          |      |       |                                             |
          |      |   í 1 | DCD normal                                  |
          |------+-------+---------------------------------------------|
          |  6   |     0 | DSR forced high                             |
          |      |       |                                             |
          |      |   í 1 | DSR normal                                  |
          |------+-------+---------------------------------------------|
          |  7   |   í 0 | Long space disconnect function disabled     |
          |      |       |                                             |
          |      |     1 | Long space disconnect function enabled      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S22                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S22=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 119                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls speaker volume and controls, and   |
          |              | limits results codes.                       |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1, 0 |    00 | Off volume                                  |
          |      |       |                                             |
          |      |    01 | Low level volume                            |
          |      |       |                                             |
          |      |    10 | Medium level volume                         |
          |      |       |                                             |
          |      |  í 11 | High level volume                           |
          |------+-------+---------------------------------------------|
          | 3, 2 |    00 | Speaker off                                 |
          |      |       |                                             |
          |      |  í 01 | Speaker off on carrier                      |
          |      |       |                                             |
          |      |    10 | Speaker always on                           |
          |      |       |                                             |
          |      |    11 | Speaker on during handshake                 |
          |------+-------+---------------------------------------------|
          | 6 -  |   000 | Basic result codes only enabled             |
          |  4   |       |                                             |
          |      |   100 | Basic and connection speed result codes     |
          |      |       | enabled                                     |
          |      |   101 |                                             |
          |      |       | Basic and connection speed result codes and |
          |      |   110 | dialtone detection enabled                  |
          |      |       |                                             |
          |      | í 111 | All result codes except dialtone detection  |
          |      |       | enabled                                     |
          |      |       |                                             |
          |      |       | All result codes enabled                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S23                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S23=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 27                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0-63                                        |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Grants/denies remote digital loopback,      |
          |              | controls DTE rate and parity.               |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Remote digital loopback denied              |
          |      |       |                                             |
          |      |   í 1 | Remote digital loopback allowed             |
          |------+-------+---------------------------------------------|
          | 3 -  |   000 | Sets serial port speed to 300bps            |
          |  1   |       |                                             |
          |      |   001 | Sets serial port speed to 600bps            |
          |      |       |                                             |
          |      |   010 | Sets serial port speed to 1200bps           |
          |      |       |                                             |
          |      |   011 | Sets serial port speed to 2400bps           |
          |      |       |                                             |
          |      |   100 | Sets serial port speed to 4800bps           |
          |      |       |                                             |
          |      | í 101 | Sets serial port speed to 9600bps           |
          |      |       |                                             |
          |      |   110 | Sets serial port speed to 19200bps          |
          |      |       |                                             |
          |      |   111 | Sets serial port speed to 38400bps          |
          |------+-------+---------------------------------------------|
          | 5, 4 |    00 | Parity even                                 |
          |      |       |                                             |
          |      |  í 01 | Space Parity                                |
          |      |       |                                             |
          |      |    10 | Parity odd                                  |
          |      |       |                                             |
          |      |    11 | Mark or No Parity                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S27                   |
          |------------------------------------------------------------|
          | Format        | AT [cmds] S27=n [cmds]                     |
          |---------------+--------------------------------------------|
          | Default:      | 64                                         |
          |---------------+--------------------------------------------|
          | Range:        | 0-64                                       |
          |---------------+--------------------------------------------|
          | Unit:         | Bit-mapped                                 |
          |---------------+--------------------------------------------|
          | Description:  | Selects ITU-T/Bell modes.                  |
          |---------------+--------------------------------------------|
          |  Bit  | Value |                  Function                  |
          |-------+-------+--------------------------------------------|
          | 5 - 0 |   í 0 | Not used                                   |
          |-------+-------+--------------------------------------------|
          |   6   |     0 | ITU/T mode                                 |
          |       |       |                                            |
          |       |   í 1 | Bell mode                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S31                   |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] S31=n [cmds]                    |
          |----------------+-------------------------------------------|
          | Default:       | Unidentified                              |
          |----------------+-------------------------------------------|
          | Range:         | 0-194                                     |
          |------------------------------------------------------------|
          | Unit:                      | Bit-mapped                    |
          |------------------------------------------------------------|
          | Description:   | Select automode, auto-retrain, and        |
          |                | auto-fallback/fall-forward.               |
          |------------------------------------------------------------|
          |    Bit    | Value |                Function                |
          |-----------+-------+----------------------------------------|
          |     0     |   í 0 | Not used                               |
          |-----------+-------+----------------------------------------|
          |     1     |     0 | Auto-mode detection disabled, uses S37 |
          |           |       |                                        |
          |           |     1 | Auto-mode detection enabled            |
          |-----------+-------+----------------------------------------|
          |   5 - 2   |     í | Not used                               |
          |           |  0000 |                                        |
          |-----------+-------+----------------------------------------|
          |   7, 6    |    00 | Auto-retrain disabled                  |
          |           |       |                                        |
          |           |    01 | Auto-retrain enabled                   |
          |           |       |                                        |
          |           |    10 | Auto-fallback/fall-forward enabled     |
          |           |       |                                        |
          |           |  í 11 | Both auto-retrain and                  |
          |           |       | auto-fallback/fall-forward enabled     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S40                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S40=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-138                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls connect mode, break handling, and  |
          |              | flow control.                               |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          | 1, 0 |    00 | Normal mode enabled                         |
          |      |       |                                             |
          |      |    01 | MNP reliable mode enabled                   |
          |      |       |                                             |
          |      |    10 | MNP auto-reliable mode enabled              |
          |------+-------+---------------------------------------------|
          | 3, 2 |    00 | \K1                                         |
          |      |       |                                             |
          |      |    01 | \K2                                         |
          |      |       |                                             |
          |      |    10 | \K3                                         |
          |------+-------+---------------------------------------------|
          | 6 -  |     0 | Not used                                    |
          |  4   |       |                                             |
          |------+-------+---------------------------------------------|
          |  7   |     0 | Flow control disabled                       |
          |      |       |                                             |
          |      |     1 | Flow control enabled                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BIT-MAPPED REGISTER S41                   |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S41=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-5                                         |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Selects compression, and encryption mode.   |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |     0 | Data compression disabled                   |
          |      |       |                                             |
          |      |     1 | Data compression enabled                    |
          |------+-------+---------------------------------------------|
          |  1   |     0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  2   |     0 | Encryption disabled                         |
          |      |       |                                             |
          |      |     1 | Encryption enabled                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BREAK TYPE                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Kn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Configures action of break signal           |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |      \K1      | Break sent to remote modem and buffers     |
          |               | cleared                                    |
          |---------------+--------------------------------------------|
          |      \K2      | Send break to remote modem immediately     |
          |---------------+--------------------------------------------|
          |      \K3      | Send break with transmitted data           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       DCE LINE SPEED                       |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] Fn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum allowable data exchange    |
          |              | rate attempted                              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      F0      | Match DTE speed                             |
          |--------------+---------------------------------------------|
          |      F1      | 2400bps                                     |
          |--------------+---------------------------------------------|
          |      F2      | 4800bps                                     |
          |--------------+---------------------------------------------|
          |      F3      | 7200bps                                     |
          |--------------+---------------------------------------------|
          |      F4      | 9600bps                                     |
          |--------------+---------------------------------------------|
          |      F5      | 12Kbps                                      |
          |--------------+---------------------------------------------|
          |      F6      | 14.4Kbps                                    |
          |--------------+---------------------------------------------|
          |      F7      | 16.8 Kbps                                   |
          |--------------+---------------------------------------------|
          |      F8      | 19.2Kbps                                    |
          |--------------+---------------------------------------------|
          |      F9      | 21.6 Kbps                                   |
          |--------------+---------------------------------------------|
          |     F10      | 24 Kbps                                     |
          |--------------+---------------------------------------------|
          |     F11      | 26.4 Kbps                                   |
          |--------------+---------------------------------------------|
          |     F12      | 28.8Kbps                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                            DIAL                            |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] D<#> [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Dials telephone number according to any     |
          |              | modifiers included in the string            |
          |--------------+---------------------------------------------|
          | Note:        | Any combination of modifiers can be used to |
          |              | produce the desired dial functions in       |
          |              | sequence.                                   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      P       | Pulse dialing enabled                       |
          |--------------+---------------------------------------------|
          |      T       | Tone dialing enabled/Pulse dialing disabled |
          |--------------+---------------------------------------------|
          |      R       | Dial a call in answer mode.                 |
          |--------------+---------------------------------------------|
          |      W       | Dialing resumed following detection of      |
          |              | second dial tone, time specified in S7      |
          |              | register use for time-out.                  |
          |--------------+---------------------------------------------|
          |      ,       | Dialing paused for amount of time specified |
          |              | in S8 register                              |
          |--------------+---------------------------------------------|
          |      !       | Flash function initiated. Modem commanded   |
          |              | to go off-hook for .5 second before         |
          |              | returning on-hook.                          |
          |--------------+---------------------------------------------|
          |      @       | Waits for 5 seconds of silence then         |
          |              | continues.                                  |
          |--------------+---------------------------------------------|
          |      ;       | Modem returned to command state after       |
          |              | dialing. The semicolon can only be placed   |
          |              | at the end of the dial command.             |
          |--------------+---------------------------------------------|
          |      L       | Re-dial last number                         |
          |--------------+---------------------------------------------|
          |     S=n      | Dial stored telephone number n              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %C0      | Data compression disabled                   |
          |--------------+---------------------------------------------|
          |     %C1      | Data compression enabled                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CONNECT MODE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Nn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the type of connection the modem   |
          |              | will operate in                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \N0      | Normal mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N2      | MNP reliable mode enabled                   |
          |--------------+---------------------------------------------|
          |     \N3      | MNP auto-reliable mode enabled              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    ENCRYPTION/SECURITY                     |
          |------------------------------------------------------------|
          | Type:          | Configuration                             |
          |----------------+-------------------------------------------|
          | Format:        | AT [cmds] $In [cmds]                      |
          |----------------+-------------------------------------------|
          | Description:   | Sets up encryption and password for a     |
          |                | secure connection. n=0-1                  |
          |------------------------------------------------------------|
          |      Note: After the command is issued use the keypad on   |
          |      the modem to enter the PIN number. This will be       |
          |      retained unitl ATZ is issued or the modem is turned   |
          |      off. The modem will now be in encryption mode.        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                ENCRYPTION/SECURITY - BYPASS                |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] $B1 [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Used to bypass encryption/security to make  |
          |              | a connection with another modem without     |
          |              | this feature. The modem will prompt the     |
          |              | user to enter a PIN to bypass, use the key  |
          |              | pad on the modem.                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FLOW CONTROL                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Gn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects modem port flow control             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \G0      | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |     \G1      | Flow control enabled                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FLOW CONTROL                        |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S39? [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Displays the current flow control           |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      0       | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |      3       | RTS/CTS flow control enabled                |
          |--------------+---------------------------------------------|
          |      4       | XON/XOFF flow control enabled               |
          |--------------+---------------------------------------------|
          |      5       | Transparent XON/XOFF flow control enabled   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     LINE SIGNAL LEVEL                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %L [cmds]                         |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 9-43                                        |
          |--------------+---------------------------------------------|
          | Unit:        | -dBm                                        |
          |--------------+---------------------------------------------|
          | Description: | Returns a value which indicates the         |
          |              | received line signal level                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    LINE SIGNAL QUALITY                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Q [cmds]                         |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0-127                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Unidentified                                |
          |--------------+---------------------------------------------|
          | Description: | Returns a value which indicates line signal |
          |              | quality                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      LIST S-REGISTERS                      |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %R [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Display all S-registers (Block format)      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         TEST MODES                         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S16=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-125                                       |
          |--------------+---------------------------------------------|
          | Unit:        | Bit-mapped                                  |
          |--------------+---------------------------------------------|
          | Description: | Controls loopback tests, analog, digital,   |
          |              | remote digital, and self tests.             |
          |--------------+---------------------------------------------|
          | Bit  | Value |                  Function                   |
          |------+-------+---------------------------------------------|
          |  0   |   í 0 | Local analog loopback not in progress       |
          |      |       |                                             |
          |      |     1 | Local analog loopback in progress           |
          |------+-------+---------------------------------------------|
          |  1   |   í 0 | Not used                                    |
          |------+-------+---------------------------------------------|
          |  2   |   í 0 | Local digital loopback not in progress      |
          |      |       |                                             |
          |      |     1 | Local digital loopback in progress          |
          |------+-------+---------------------------------------------|
          |  3   |   í 0 | Modem not in remote digital loopback        |
          |      |       |                                             |
          |      |     1 | Remote digital loopback in progress         |
          |------+-------+---------------------------------------------|
          |  4   |   í 0 | Remote digital loopback not requested       |
          |      |       |                                             |
          |      |     1 | Remote digital loopback requested           |
          |------+-------+---------------------------------------------|
          |  5   |   í 0 | Remote digital loopback w/ self-test not in |
          |      |       | progress                                    |
          |      |     1 |                                             |
          |      |       | Remote digital loopback w/ self-test in     |
          |      |       | progress                                    |
          |------+-------+---------------------------------------------|
          |  6   |   í 0 | Local analog loopback w/ self-test not in   |
          |      |       | progress                                    |
          |      |     1 |                                             |
          |      |       | Local analog loopback w/ self-test in       |
          |      |       | progress                                    |
          +------------------------------------------------------------+