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       # COMPAQ COMPUTER CORPORATION
       
          NETELLIGENT 56K ISA FAX MODEM
       
          Card Type              Modem/Fax card                          
          Chip Set               Unidentified                            
          I/O Options            Line in, phone out                      
          Maximum Modem Rate     56Kbps                                  
          Maximum Fax Rate       14.4Kbps                                
          Data Modulation        Bell 103A/212A                          
          Protocol                                                       
                                 ITU-T V34, V.32bis, V.32, V.22bis,      
                                 V.23, V.22, V.21                        
          Fax Modulation         ITU-T V.17, V.27ter, V.29, V.21, EIA    
          Protocol               T-30                                    
          Error                  MNP5, MNP10, V.42, V.42bis              
          Correction/Compression 
          Fax Class              Class I                                 
          Data Bus               16-bit ISA                              
          Card Size              Half-length                             
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        |  Label   |   Function   |  Label  |
          |------------------------------------------------------------|
          | Line out                    |    CN1     | Phone in | CN2  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        PLUG & PLAY                         |
          |------------------------------------------------------------|
          |       Setting        |JP3/A |JP3/B |JP3/C |  JP3/D  |JP3/E |
          |----------------------+------+------+------+---------+------|
          |  Plug and play mode  | Open | Open |Closed| Closed  |Closed|
          |       enabled        |      |      |      |         |      |
          |----------------------+------+------+------+---------+------|
          |  Plug and play mode  |Closed|Closed| Open |     Open| Open |
          | disabled/legacy mode |      |      |      |         |      |
          |       enabled        |      |      |      |         |      |
          |------------------------------------------------------------|
          |Note: When in plug & play mode, jumpers must be removed from|
          |JP1 and JP2.                                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    SERIAL PORT ADDRESS                     |
          |------------------------------------------------------------|
          |      Setting       |  JP1/A  |  JP1/B  |  JP1/C  |  JP1/D  |
          |--------------------+---------+---------+---------+---------|
          |    COM1 (3F8h)     |  Open   |  Open   |  Open   | Closed  |
          |--------------------+---------+---------+---------+---------|
          |   í COM2 (2F8h)    |  Open   |  Open   | Closed  |  Open   |
          |--------------------+---------+---------+---------+---------|
          |    COM3 (3E8h)     |  Open   | Closed  |  Open   |  Open   |
          |--------------------+---------+---------+---------+---------|
          |    COM4 (2E8h)     | Closed  |  Open   |  Open   |  Open   |
          +------------------------------------------------------------+
       
       +----------------------------------------------------------------------+
       |                              INTERRUPT                               |
       |----------------------------------------------------------------------|
       |Setting|JP2/A |JP2/B |JP2/C |JP2/D |JP2/E |JP2/F |JP2/G |JP2/H |JP2/I |
       |-------+------+------+------+------+------+------+------+------+------|
       | IRQ3  |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       | IRQ4  | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       | IRQ5  | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       | IRQ7  | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       | IRQ9  | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       | IRQ10 | Open | Open | Open | Open | Open |Closed| Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       | IRQ11 | Open | Open | Open | Open | Open | Open |Closed| Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       | IRQ12 | Open | Open | Open | Open | Open | Open | Open |Closed| Open |
       |-------+------+------+------+------+------+------+------+------+------|
       | IRQ15 | Open | Open | Open | Open | Open | Open | Open | Open |Closed|
       +----------------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   SUPPORTED COMMAND SET                    |
          |------------------------------------------------------------|
          |                     Basic AT Commands                      |
          |------------------------------------------------------------|
          | AT, ‘+++’, A/                                              |
          |------------------------------------------------------------|
          | A, E, H, O, Q, R, V, W, Y, Z                               |
          |------------------------------------------------------------|
          | &C, &P, &V, &W, &Y                                         |
          |------------------------------------------------------------|
          | \K, \N                                                     |
          |------------------------------------------------------------|
          |                    Extended AT Commands                    |
          |------------------------------------------------------------|
          | %C, %E, %L                                                 |
          |------------------------------------------------------------|
          |                        S Registers                         |
          |------------------------------------------------------------|
          | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12,     |
          | S14, S16, S18, S21, S22, S23, S24, S25                     |
          |------------------------------------------------------------|
          | S26, S27, S28, S29, S30, S31, S32, S33, S36, S38, S39,     |
          | S40, S41, S46, S48, S82, S91, S92, S95                     |
          |------------------------------------------------------------|
          |                                                            |
          |------------------------------------------------------------|
          |                      Special Commands                      |
          |------------------------------------------------------------|
          | +MS                                                        |
          |------------------------------------------------------------|
          | Note: See MHI Help File for full command documentation.    |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                     REPORT INFORMATION                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] In [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays information requested              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      I0      | Reports four digit product code             |
          |--------------+---------------------------------------------|
          |      I1      | Reports ROM checksum                        |
          |--------------+---------------------------------------------|
          |      I2      | Reports results of RAM self test            |
          |--------------+---------------------------------------------|
          |      I3      | Reports firmware revision level             |
          |--------------+---------------------------------------------|
          |      I4      | Reports OEM-defined identifier string       |
          |--------------+---------------------------------------------|
          |      I5      | Reports country code                        |
          |--------------+---------------------------------------------|
          |      I6      | Reports modem data pump model               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SPEAKER VOLUME                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Ln [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Controls speaker volume                     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      L0      | Low volume setting                          |
          |--------------+---------------------------------------------|
          |     í L1     | Low volume setting                          |
          |--------------+---------------------------------------------|
          |      L2      | Medium volume setting                       |
          |--------------+---------------------------------------------|
          |      L3      | Highest volume setting                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        SPEAKER MODE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Mn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Selects various speaker options             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      M0      | Speaker disabled                            |
          |--------------+---------------------------------------------|
          |     í M1     | Speaker enabled until carrier signal        |
          |              | detected                                    |
          |--------------+---------------------------------------------|
          |      M2      | Speaker enabled                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    AUTO-MODE DETECTION                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Nn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Selects various options for the automatic   |
          |              | detection and negotiation of protocols      |
          |              | during the handshake process if the modem   |
          |              | is communicating with a remote modem of     |
          |              | dissimilar speed.                           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      N0      | Handshake begins at line speed designated   |
          |              | by the S37 register.                        |
          |--------------+---------------------------------------------|
          |      N1      | Handshake at any speed supported by both    |
          |              | modems.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             SELECT CALL PROGRESS RESULT CODES              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Xn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Enables selection of tone detection and     |
          |              | associated result code format options       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      X0      | Busy tone detection disabled; result codes  |
          |              | 0 - 5 enabled.                              |
          |--------------+---------------------------------------------|
          |      X1      | Busy tone detection disabled; result codes  |
          |              | 0 - 6 enabled.                              |
          |--------------+---------------------------------------------|
          |      X2      | Busy tone detection disabled,; result codes |
          |              | 0 - 8 enabled                               |
          |--------------+---------------------------------------------|
          |      X3      | Busy tone detection enabled; result codes   |
          |              | 0-8 enabled                                 |
          |--------------+---------------------------------------------|
          |      X4      | Busy tone detection enabled; sends all      |
          |              | messages.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DATA TERMINAL READY (DTR)                  |
          |------------------------------------------------------------|
          | Type:         | Configuration                              |
          |---------------+--------------------------------------------|
          | Format:       | AT [cmds] &Dn [cmds]                       |
          |---------------+--------------------------------------------|
          | Description:  | Selects modem response to DTR              |
          |------------------------------------------------------------|
          |      Note: The action each variant of &D causes depends on |
          |      the setting of &Q                                     |
          |------------------------------------------------------------|
          |    &Q Setting    |   &D0   |   &D1   |   &D2   |    &D3    |
          |------------------+---------+---------+---------+-----------|
          |  &Q0, &Q5, &Q6   |  NONE   | Command | Command | Command 4 |
          |                  |         |    2    |    3    |           |
          |------------------+---------+---------+---------+-----------|
          |     &Q1, &Q4     | Command | Command | Command | Command 4 |
          |                  |    1    |    2    |    3    |           |
          |------------------+---------+---------+---------+-----------|
          |     &Q2, &Q3     | Command | Command | Command | Command 3 |
          |                  |    3    |    3    |    3    |           |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |   Command 0   | Modem does not respond to DTR              |
          |---------------+--------------------------------------------|
          |   Command 1   | Modem goes to command mode after DTR goes  |
          |               | is off                                     |
          |---------------+--------------------------------------------|
          |   Command 2   | Modem goes to command mode and disconnects |
          |               | (hangs up) after DTR goes off; Auto-Answer |
          |               | is disabled.                               |
          |---------------+--------------------------------------------|
          |   Command 3   | Modem is initialized after DTR goes off    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  FACTORY DEFAULT PROFILE                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &F [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Sets values in active profile to values     |
          |              | found in the default profile                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &F0      | Sets values to factory configuration 0      |
          |--------------+---------------------------------------------|
          |     &F1      | Sets values to factory configuration 1      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        FLOW CONTROL                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Kn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Enables flow control options                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &K0      | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |    í &K3     | RTS/CTS flow control enabled                |
          |--------------+---------------------------------------------|
          |     &K4      | XON/XOFF flow control enabled               |
          |--------------+---------------------------------------------|
          |     &K5      | Transparent XON/XOFF flow control enabled   |
          |--------------+---------------------------------------------|
          |     &K6      | Unidirectional XON/XOFF flow control        |
          |              | enabled                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    COMMUNICATIONS MODE                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Qn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects communications mode options         |
          |--------------+---------------------------------------------|
          |   Command    |                    Mode                     |
          |--------------+---------------------------------------------|
          |     &Q0      | Asynchronous mode, serial port speed        |
          |              | follows connect speed.                      |
          |--------------+---------------------------------------------|
          |    í &Q5     | Error correction mode                       |
          |--------------+---------------------------------------------|
          |     &Q6      | Buffered asynchronous mode                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        RECEIVE DATA                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Rn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects RTS options                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &R0      | Not supported                               |
          |--------------+---------------------------------------------|
          |    í &R1     | CTS will drop if required by flow control   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DATA SET READY (DSR)                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Sn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects DSR options                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &S0     | DSR forced high                             |
          |--------------+---------------------------------------------|
          |     &S1      | DSR high only while modem is handshaking or |
          |              | connected                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         TEST MODES                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Tn                               |
          |--------------+---------------------------------------------|
          | Description: | Selects test options                        |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &T0      | End current test                            |
          |--------------+---------------------------------------------|
          |     &T1      | Begin local analog loopback test            |
          |--------------+---------------------------------------------|
          |     &T4      | Grant remote digital loopback request       |
          |--------------+---------------------------------------------|
          |    í &T5     | Deny remote digital loopback request        |
          |--------------+---------------------------------------------|
          |     &T6      | Request remote digital loopback             |
          |--------------+---------------------------------------------|
          |     &T7      | Request remote digital loopback and         |
          |              | self-test                                   |
          |--------------+---------------------------------------------|
          |     &T8      | Begin local analog loopback and self-test   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   STORE TELEPHONE NUMBER                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Zn=(phone #)                     |
          |--------------+---------------------------------------------|
          | Description: | Writes selected telephone numbers into the  |
          |              | non-volatile memory at location n           |
          |------------------------------------------------------------|
          |      Note: Telephone numbers can include up to 34          |
          |      characters.                                           |
          +------------------------------------------------------------+
       
                               EXTENDED AT COMMANDS
       
          +------------------------------------------------------------+
          |                         BREAK TYPE                         |
          |------------------------------------------------------------|
          | Type:               | Configuration                        |
          |---------------------+--------------------------------------|
          | Format:             | AT [cmds] \Kn [cmds]                 |
          |---------------------+--------------------------------------|
          | Description:        | Configures action of break signal    |
          |------------------------------------------------------------|
          |  Command  |  Break from  | Break received | Break from DTE |
          |           |  DTE during  |  from remote   | during DIRECT  |
          |           |  NORMAL or   |  modem during  |      mode      |
          |           |   MNP mode   |  NORMAL mode   |                |
          |-----------+--------------+----------------+----------------|
          |    \K0    | Online       | Buffers        | Send break to  |
          |           | command mode | cleared, break | remote modem,  |
          |           | enabled,     | sent to DTE    | online command |
          |           | send no      |                | mode enabled   |
          |           | break to     |                |                |
          |           | remote modem |                |                |
          |-----------+--------------+----------------+----------------|
          |    \K1    | Break sent   | Buffers        | Send break to  |
          |           | to remote    | cleared, break | remote modem,  |
          |           | modem and    | sent to DTE    | online command |
          |           | buffered     |                | mode enabled   |
          |           | cleared      |                |                |
          |-----------+--------------+----------------+----------------|
          |    \K2    | Online       | Break sent     | Send break to  |
          |           | command mode | immediately to | remote modem   |
          |           | enabled,     | DTE            |                |
          |           | send no      |                |                |
          |           | break to     |                |                |
          |           | remote modem |                |                |
          |-----------+--------------+----------------+----------------|
          |    \K3    | Send break   | Break sent     | Send break to  |
          |           | to remote    | immediately to | remote modem,  |
          |           | modem        | DTE            | online command |
          |           | immediately  |                | mode enabled   |
          |-----------+--------------+----------------+----------------|
          |    \K4    | Online       | Break sent     | Send break to  |
          |           | command mode | with received  | remote modem   |
          |           | enabled,     | data to the    |                |
          |           | send no      | DTE            |                |
          |           | break to     |                |                |
          |           | remote modem |                |                |
          |-----------+--------------+----------------+----------------|
          |    \K5    | Send break   | Break sent     | Send break to  |
          |           | with         | with received  | remote modem   |
          |           | transmitted  | data to the    |                |
          |           | data         | DTE            |                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        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                         |
          |--------------+---------------------------------------------|
          |     \N1      | Direct mode enabled                         |
          |--------------+---------------------------------------------|
          |     \N2      | Reliable mode enabled                       |
          |--------------+---------------------------------------------|
          |     \N3      | Auto-reliable mode enabled                  |
          |--------------+---------------------------------------------|
          |     \N4      | LAPM reliable mode enabled                  |
          |--------------+---------------------------------------------|
          |     \N5      | MNP reliable mode enabled                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      CONNECT MESSAGES                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects the operating mode the modem uses   |
          |              | while connected                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \V0      | Connect messages are controlled by command  |
          |              | settings X, W, and S95                      |
          |--------------+---------------------------------------------|
          |     \V1      | Connect messages are displayed in single    |
          |              | line format                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    LINE SIGNAL QUALITY                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Q [cmds]                         |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | -1 dBm                                      |
          |--------------+---------------------------------------------|
          | Description: | Returns a value which indicates line signal |
          |              | quality                                     |
          |------------------------------------------------------------|
          |      Note: Values 0-7 indicate no retrain. 8-255 retrain   |
          |      performed if enabled by %E1                           |
          +------------------------------------------------------------+
       
                               S(STATUS) -REGISTERS
       
          +------------------------------------------------------------+
          |                          AUTOSYNC                          |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S19=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets Auto-Sync options                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       AUTOSYNC HDLC                        |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S20=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets Auto-Sync HDLC addresses               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       DCE LINE SPEED                       |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S37=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum allowable data exchange    |
          |              | rate attempted during handshake process.    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S37=0     | Speed of last connection                    |
          |--------------+---------------------------------------------|
          |    S37=1     | 300bps                                      |
          |--------------+---------------------------------------------|
          |    S37=2     | 300bps                                      |
          |--------------+---------------------------------------------|
          |    S37=3     | 300bps                                      |
          |--------------+---------------------------------------------|
          |    S37=4     | Reserved                                    |
          |--------------+---------------------------------------------|
          |    S37=5     | V.22 1200bps                                |
          |--------------+---------------------------------------------|
          |    S37=6     | V.22bis 2400bps                             |
          |--------------+---------------------------------------------|
          |    S37=7     | V.23                                        |
          |--------------+---------------------------------------------|
          |    S37=8     | V.32/V.32bis 4800bps                        |
          |--------------+---------------------------------------------|
          |    S37=9     | V.32/V.32bis 9600bps                        |
          |--------------+---------------------------------------------|
          |    S37=10    | V.32bis 12.0Kbps                            |
          |--------------+---------------------------------------------|
          |    S37=11    | V.32bis 14.4Kbps                            |
          |--------------+---------------------------------------------|
          |    S37=12    | V.32bis 7200bps                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CONNECTION FAILURE CODES                  |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S86? [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Reports codes which correspond to the       |
          |              | possible causes of a connection failure     |
          |--------------+---------------------------------------------|
          |    Value     |                   Meaning                   |
          |--------------+---------------------------------------------|
          |      0       | Normal hang up                              |
          |--------------+---------------------------------------------|
          |      4       | Carrier signal lost                         |
          |--------------+---------------------------------------------|
          |      5       | No error-control detected for remote modem  |
          |              | during feature negotiation                  |
          |--------------+---------------------------------------------|
          |      9       | No common protocol found                    |
          |--------------+---------------------------------------------|
          |      12      | No failure - remote modem disconnected      |
          |              | normally                                    |
          |--------------+---------------------------------------------|
          |      13      | Remote modem failed to respond after 10     |
          |              | re-transmissions same message               |
          |--------------+---------------------------------------------|
          |      14      | Violation of negotiated protocol caused     |
          |              | failure                                     |
          +------------------------------------------------------------+
       
          +----------------------------------------------------+
          |           MISCELLANEOUS TECHNICAL NOTES            |
          |----------------------------------------------------|
          | Information on register S202 currently unavailable |
          +----------------------------------------------------+