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       # TRENDWARE INTERNATIONAL
       
          TEM-336P PCMCIA
       
          Card Type              Modem, Fax                              
          Chip Set               Unidentified                            
          Maximum Modem Rate     33.6Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Modulation        Bell 103A/212A                          
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.32,        
                                 V.32bis, V.34, V.34bis                  
          Fax Modulation         ITU-T V.17, V.21CH2, V.27ter, V.29      
          Protocol               
          Error                  MNP5, V.42, V.42bis                     
          Correction/Compression 
          Fax Class              Class I                                 
          Data Bus               PCMCIA                                  
       
                                                                   54927
       
          +------------------------------------------------------------+
          |                   SUPPORTED COMMAND SET                    |
          |------------------------------------------------------------|
          |                     Basic AT Commands                      |
          |------------------------------------------------------------|
          | AT, A/                                                     |
          |------------------------------------------------------------|
          | A, E, H, M, P, Q, T, V, W                                  |
          |------------------------------------------------------------|
          | &C, &F, &G, &V, &Z                                         |
          |------------------------------------------------------------|
          |                    Extended AT Commands                    |
          |------------------------------------------------------------|
          | \J, \T, \V                                                 |
          |------------------------------------------------------------|
          |                      Special Commands                      |
          |------------------------------------------------------------|
          | -C                                                         |
          |------------------------------------------------------------|
          |                        S Registers                         |
          |------------------------------------------------------------|
          | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S30 |
          |------------------------------------------------------------|
          | Note: See MHI Help File for full command documentation.    |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                  COMMUNICATION PROTOCOLS                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Bn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Selects the communication protocol for data |
          |              | calls                                       |
          |------------------------------------------------------------|
          |      Note: The B command allows the simultaneous selection |
          |      of more than one suffix, enabling multiple protocols. |
          |------------------------------------------------------------|
          |   Command    |                  Protocol                   |
          |--------------+---------------------------------------------|
          |      B0      | ITU-T V.22 at 1200bps                       |
          |--------------+---------------------------------------------|
          |      B1      | Bell 212A at 1200bps                        |
          |--------------+---------------------------------------------|
          |      B2      | V.23 at 1200/75bps                          |
          |--------------+---------------------------------------------|
          |      B3      | V.23 at 75/1200bps                          |
          |--------------+---------------------------------------------|
          |     B15      | V.21 at 300bps                              |
          |--------------+---------------------------------------------|
          |     B16      | Bell 103 at 300bps                          |
          +------------------------------------------------------------+
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
          +------------------------------------------------------------+
          |                            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                   |
          |--------------+---------------------------------------------|
          |      DL      | Re-dial last number                         |
          |--------------+---------------------------------------------|
          |      DP      | Pulse dialing enabled                       |
          |--------------+---------------------------------------------|
          |      DR      | Answer mode enabled; originate mode         |
          |              | disabled following handshake initiation.    |
          |--------------+---------------------------------------------|
          |     DS=n     | Dial stored telephone number n              |
          |--------------+---------------------------------------------|
          |      DT      | Tone dialing enabled/Pulse dialing disabled |
          |--------------+---------------------------------------------|
          |      DW      | Dialing resumed following dial tone         |
          |              | detection                                   |
          |--------------+---------------------------------------------|
          |      D,      | Dialing paused for amount of time specified |
          |              | in S8 register                              |
          |--------------+---------------------------------------------|
          |      D!      | Flash function initiated. Modem commanded   |
          |              | to go off-hook for specified time before    |
          |              | returning on-hook.                          |
          |--------------+---------------------------------------------|
          |      D@      | Wait for Quite Answer function enabled.     |
          |              | Modem waits until a "quiet answer," a       |
          |              | ring-back signal followed by silence up to  |
          |              | the time specified in S7, is received prior |
          |              | to executing the rest of the dial string.   |
          |--------------+---------------------------------------------|
          |      D;      | Modem returned to idle state after dialing. |
          |              | The semicolon can only be placed at the end |
          |              | of the dial command.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    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      | Auto-mode detection disabled                |
          |--------------+---------------------------------------------|
          |     í N1     | In originate mode, handshake begins at line |
          |              | speed designated by the S37 register. Modem |
          |              | can shift to a slower speed if necessary.   |
          |              |                                             |
          |              | In answer mode, handshake attempted with    |
          |              | the following protocols in order - V.FC,    |
          |              | V.32bis, V.32, V.22bis, V.22 or Bell 212,   |
          |              | V.21, and Bell 103                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          ON-LINE                           |
          |------------------------------------------------------------|
          | Type:         | Immediate                                  |
          |---------------+--------------------------------------------|
          | Format:       | AT [cmds] On [cmds]                        |
          |---------------+--------------------------------------------|
          | Description:  | Controls on-line command (data             |
          |               | transmission) state options.               |
          |------------------------------------------------------------|
          |      Note: The O command must be placed at the end of the  |
          |      command string.                                       |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |      O0       | On-line command mode with no retraining    |
          |               | enabled                                    |
          |---------------+--------------------------------------------|
          |      O1       | On-line command mode with retraining       |
          |               | enabled                                    |
          |---------------+--------------------------------------------|
          |      O3       | Issue a rate re-negotiate, then return to  |
          |               | on-line state                              |
          +------------------------------------------------------------+
       
                                         
       
          +------------------------------------------------------------+
          |             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 and dial tone detection disabled;      |
          |              | result codes 0 - 4 enabled.                 |
          |--------------+---------------------------------------------|
          |      X1      | Busy and dial tone detection disabled;      |
          |              | result codes 0 - 5 & 10 enabled.            |
          |--------------+---------------------------------------------|
          |      X2      | Busy tone detection disabled, dial tone     |
          |              | detection enabled; result codes 0 - 6 & 10  |
          |              | enabled.                                    |
          |--------------+---------------------------------------------|
          |      X3      | Busy tone detection enabled, dial tone      |
          |              | detection disabled; result codes 0 - 5, 7 & |
          |              | 10 enabled.                                 |
          |--------------+---------------------------------------------|
          |     í X4     | Busy and dial tone detection enabled;       |
          |              | result codes 0 - 7 & 10 enabled.            |
          |--------------+---------------------------------------------|
          |      X5      | Busy and dial tone detection enabled;       |
          |              | result codes 0 - 7 & 10 enabled.            |
          |--------------+---------------------------------------------|
          |      X6      | Busy and dial tone detection enabled;       |
          |              | result codes 0 - 7 & 10 enabled.            |
          |--------------+---------------------------------------------|
          |      X7      | Display CONNECT or "1" for all speeds.      |
          |              | Check dial tone and busy tone               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         SOFT RESET                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Zn [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Restores modem profiles previously saved in |
          |              | non-volatile RAM using the &W command.      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      Z0      | Restore setting 0                           |
          |--------------+---------------------------------------------|
          |      Z1      | Restore setting 0                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DATA TERMINAL READY (DTR)                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Dn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects modem response to DTR               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &D0     | Modem does not respond to DTR               |
          |--------------+---------------------------------------------|
          |     &D1      | Modem goes to command mode after DTR goes   |
          |              | is off                                      |
          |--------------+---------------------------------------------|
          |     &D2      | Modem goes to command mode and disconnects  |
          |              | (hangs up) after DTR goes off; Auto-Answer  |
          |              | is disabled.                                |
          |--------------+---------------------------------------------|
          |     &D3      | Modem is initialized after DTR goes off     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        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               |
          +------------------------------------------------------------+
       
                                         
       
                                         
       
                                         
       
          +------------------------------------------------------------+
          |                    PULSE DIALING RATIO                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Pn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects pulse dial make/break ratio         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &P0     | 39/61ms at 10pps (North America)            |
          |--------------+---------------------------------------------|
          |     &P1      | 33/67ms at 10pps (Europe)                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    COMMUNICATIONS MODE                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Qn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects communications mode options         |
          |--------------+---------------------------------------------|
          |   Command    |                    Mode                     |
          |--------------+---------------------------------------------|
          |    í &Q0     | Buffered asynchronous mode, serial port     |
          |              | speed follows connect speed.                |
          |--------------+---------------------------------------------|
          |     &Q5      | Error correction mode                       |
          |--------------+---------------------------------------------|
          |     &Q8      | MNP error control mode                      |
          |--------------+---------------------------------------------|
          |     &Q9      | V.42 or MNP error control mode              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DATA SET READY (DSR)                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Sn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects DSR options                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &S0      | DSR forced high                             |
          |--------------+---------------------------------------------|
          |    í &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            |
          |--------------+---------------------------------------------|
          |     &T3      | Begin local digital loopback                |
          |--------------+---------------------------------------------|
          |     &T6      | Request remote digital loopback             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    STORE ACTIVE PROFILE                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Wn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Writes the values for the active profile    |
          |              | into the non-volatile RAM                   |
          +------------------------------------------------------------+
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                               Extended AT Commands
       
          +------------------------------------------------------------+
          |                        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      | V.42 reliable mode enabled                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     FLOW CONTROL TYPE                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Qn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Sets type of flow control used by modem     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \Q0      | Flow control disabled                       |
          |--------------+---------------------------------------------|
          |     \Q1      | Bidirectional XON/XOFF flow control enabled |
          |--------------+---------------------------------------------|
          |     \Q3      | Bidirectional RTS/CTS flow control enabled  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         BLACKLIST                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Bn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | View numbers in blacklist                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        COMPRESSION                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects data compression                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %C0      | Data compression disabled                   |
          |--------------+---------------------------------------------|
          |     %C1      | V.42bis/MNP5 enabled                        |
          +------------------------------------------------------------+
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                               S(status) -REGISTERS
       
          +------------------------------------------------------------+
          |                      V.34 MODULATION                       |
          |------------------------------------------------------------|
          | Format       | AT [cmds] S28=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Default:     | 1                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-255                                       |
          |--------------+---------------------------------------------|
          | Description: | Controls the V.34 modulation                |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S28=0     | Disabled                                    |
          |--------------+---------------------------------------------|
          |  S28=1-255   | Enabled                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                ERROR CORRECTION NEGOTIATION                |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S36=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects the action of the modem if it fails |
          |              | to connect with the error-correction        |
          |              | protocol set in &Q.                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   S36=0, 2   | Hang up                                     |
          |--------------+---------------------------------------------|
          |   S36=1, 3   | Attempt a direct connection                 |
          |--------------+---------------------------------------------|
          |   S36=4, 6   | Attempt a connection at MNP2-4; if that     |
          |              | fails, hang up.                             |
          |--------------+---------------------------------------------|
          |   S36=5, 7   | Attempt a connection at MNP2-4; if that     |
          |              | fails, attempt a direct connection.         |
          +------------------------------------------------------------+
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
          +------------------------------------------------------------+
          |                       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                   |
          |--------------+---------------------------------------------|
          |   í S37=0    | Maximum modem speed                         |
          |--------------+---------------------------------------------|
          |    S37=2     | 1200/75bps                                  |
          |--------------+---------------------------------------------|
          |    S37=3     | 300bps                                      |
          |--------------+---------------------------------------------|
          |    S37=5     | 1200bps                                     |
          |--------------+---------------------------------------------|
          |    S37=6     | 2400bps                                     |
          |--------------+---------------------------------------------|
          |    S37=7     | 4800bps                                     |
          |--------------+---------------------------------------------|
          |    S37=8     | 7200bps                                     |
          |--------------+---------------------------------------------|
          |    S37=9     | 9600bps                                     |
          |--------------+---------------------------------------------|
          |    S37=10    | 12000bps                                    |
          |--------------+---------------------------------------------|
          |    S37=11    | 14400bps                                    |
          |--------------+---------------------------------------------|
          |    S37=12    | 16800bps                                    |
          |--------------+---------------------------------------------|
          |    S37=13    | 19200bps                                    |
          |--------------+---------------------------------------------|
          |    S37=14    | 21600bps                                    |
          |--------------+---------------------------------------------|
          |    S37=15    | 24000bps                                    |
          |--------------+---------------------------------------------|
          |    S37=16    | 26400bps                                    |
          |--------------+---------------------------------------------|
          |    S37=17    | 28800bps                                    |
          |--------------+---------------------------------------------|
          |    S37=18    | 31200bps                                    |
          |--------------+---------------------------------------------|
          |    S37=19    | 33600bps                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       DIAL LINE RATE                       |
          |------------------------------------------------------------|
          | Type:              | Register                              |
          |--------------------+---------------------------------------|
          | Format             | AT [cmds] S38=n [cmds]                |
          |--------------------+---------------------------------------|
          | Description:       | 56K dial line rate selection          |
          |------------------------------------------------------------|
          |  Command   |                   Function                    |
          |------------+-----------------------------------------------|
          |  í S38=0   | 56K disabled                                  |
          |------------+-----------------------------------------------|
          |   S38=1    | 56K enabled, auto-speed selection, maximum    |
          |            | modem speed                                   |
          |------------+-----------------------------------------------|
          |   S38=2    | 32000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=3    | 34000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=4    | 36000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=5    | 38000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=6    | 40000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=7    | 42000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=8    | 44000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=9    | 46000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=10   | 48000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=11   | 50000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=12   | 52000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=13   | 54000bps                                      |
          |------------+-----------------------------------------------|
          |   S38=14   | 56000bps                                      |
          +------------------------------------------------------------+
       
                                         
       
                                         
       
          +------------------------------------------------------------+
          |                        SLEEP TIMER                         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format       | AT [cmds] S89 [cmds]                        |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 60                                      |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Sleep mode control timer                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      0       | Disable sleep mode                          |
          |--------------+---------------------------------------------|
          |    5 - 60    | Number of seconds of inactivity before      |
          |              | entering sleep mode                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         TRANSMISSION LEVEL (JAPANESE VERSION ONLY)         |
          |------------------------------------------------------------|
          | Type        | Register or Configuration                    |
          |-------------+----------------------------------------------|
          | Format      | AT [cmds] S91=n [cmds]                       |
          |-------------+----------------------------------------------|
          | Default     | 14                                           |
          |-------------+----------------------------------------------|
          | Range       | 6 - 15                                       |
          |-------------+----------------------------------------------|
          | Unit        | -1 dBm                                       |
          |-------------+----------------------------------------------|
          | Description | Sets the signal level for transmission over  |
          |             | leased-lines                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                FEATURE NEGOTIATION OPTIONS                 |
          |------------------------------------------------------------|
          | Type:                        | Register                    |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] S48=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects active error correction and         |
          |              | compression protocols                       |
          |------------------------------------------------------------|
          |    Command     |                 Function                  |
          |----------------+-------------------------------------------|
          |     S48=7      | Detection negotiation and XID negotiation |
          |                | enabled                                   |
          |----------------+-------------------------------------------|
          |    S48=128     | Fall-back to options set in S36           |
          +------------------------------------------------------------+