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       # MAXTECH CORPORATION
       
          XVM 144E (CL-MD1414ECT)
       
          Card Type              Modem (asynchronous), fax               
          Chip Set               Unidentified                            
          Maximum Modem Rate     14.4Kbps                                
          Maximum Fax Rate       Unidentified                            
          Data Modulation        Bell 103/212A                           
          Protocol                                                       
                                 ITU-T V.21, V.22, V.22bis, V.32,        
                                 V.32bis                                 
          Fax Modulation         ITU-T V.17, V.27ter, V.29,              
          Protocol               
          Error                  MNP5, V.42, V.42bis                     
          Correction/Compression 
          Fax Class              Class I                                 
          Data Bus               External                                
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Function        | Label  |   Function    |   Label   |
          |------------------------------------------------------------|
          | DC power                   |   CN1   | Line out     | CN4  |
          |----------------------------+---------+--------------+------|
          | Serial port                |   CN2   | Power switch | SW1  |
          |----------------------------+---------+--------------+------|
          | Line in                    |   CN3   |              |      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED  |    Color     | Status |          Condition          |
          |------+--------------+--------+-----------------------------|
          |  AA  | Unidentified |   On   |     Auto-answer enabled     |
          |------+--------------+--------+-----------------------------|
          |  AA  | Unidentified |  Off   |    Auto-answer disabled     |
          |------+--------------+--------+-----------------------------|
          |  RD  | Unidentified |   On   |   Modem is receiving data   |
          |------+--------------+--------+-----------------------------|
          |  RD  | Unidentified |  Off   | Modem is not receiving data |
          |------+--------------+--------+-----------------------------|
          |  SD  | Unidentified |   On   | Modem is transmitting data  |
          |------+--------------+--------+-----------------------------|
          |  SD  | Unidentified |  Off   |  Modem is not transmitting  |
          |      |              |        |            data             |
          |------+--------------+--------+-----------------------------|
          |  CD  | Unidentified |   On   |   Carrier signal detected   |
          |------+--------------+--------+-----------------------------|
          |  CD  | Unidentified |  Off   | Carrier signal not detected |
          |------+--------------+--------+-----------------------------|
          |  OH  | Unidentified |   On   |      Modem is off-hook      |
          |------+--------------+--------+-----------------------------|
          |  OH  | Unidentified |  Off   |      Modem is on-hook       |
          |------+--------------+--------+-----------------------------|
          |  HS  | Unidentified |   On   |    Modem is operating at    |
          |      |              |        |      4800bps or faster      |
          |------+--------------+--------+-----------------------------|
          |  HS  | Unidentified |  Off   |    Modem is operating at    |
          |      |              |        |     slower than 4800bps     |
          |------+--------------+--------+-----------------------------|
          |  TR  | Unidentified |   On   |     DTR signal is high      |
          |------+--------------+--------+-----------------------------|
          |  TR  | Unidentified |  Off   |      DTR signal is low      |
          |------+--------------+--------+-----------------------------|
          | TST  | Unidentified |   On   |    Modem is in test mode    |
          |------+--------------+--------+-----------------------------|
          | TST  | Unidentified |  Off   |  Modem is not in test mode  |
          |------+--------------+--------+-----------------------------|
          |  MR  | Unidentified |   On   |         Power is on         |
          |------+--------------+--------+-----------------------------|
          |  MR  | Unidentified |  Off   |        Power is off         |
          |------------------------------------------------------------|
          | Note: The location and configuration of the diagnostic     |
          | LEDs is unidentified                                       |
          +------------------------------------------------------------+
       
                                         
       
                                         
       
                                         
       
                                         
       
                                         
       
          +------------------------------------------------------------+
          |                   SUPPORTED COMMAND SET                    |
          |------------------------------------------------------------|
          |                     Basic AT Commands                      |
          |------------------------------------------------------------|
          | AT, ‘+++’, A/                                              |
          |------------------------------------------------------------|
          | A, B, E, H, M, O, P, Q, T, V, X, Y, Z                      |
          |------------------------------------------------------------|
          | &C, &F, &G, &T, &W, &Y, &Z                                 |
          |------------------------------------------------------------|
          |                    Extended AT Commands                    |
          |------------------------------------------------------------|
          | \A, \B, \C, \G, \J, \O, \U, \X, \Y, \Z                     |
          |------------------------------------------------------------|
          | %A, "H, -J                                                 |
          |------------------------------------------------------------|
          |                        S Registers                         |
          |------------------------------------------------------------|
          | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12,     |
          | S14, S16, S18, S21, S22, S23, S25, S26,                    |
          |------------------------------------------------------------|
          | S27, S30, S37, S90, S108, S109                             |
          |------------------------------------------------------------|
          | Note: See MHI Help File for full command documentation.    |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                    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      | Connect only at DTE rate                    |
          |--------------+---------------------------------------------|
          |     í N1     | Automatic rate negotiation                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    COMMUNICATIONS MODE                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Mn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects communications mode                 |
          |--------------+---------------------------------------------|
          |   Command    |                    Mode                     |
          |--------------+---------------------------------------------|
          |    í &M0     | Asynchronous mode                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CONFIGURATION PROFILES                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &V [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays active and stored configuration    |
          |              | profiles                                    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &V0      | Displays active and stores profile 0        |
          |--------------+---------------------------------------------|
          |     &V1      | Displays active and stored profile 1        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DATA SET READY (DSR)                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Sn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects DSR options                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    í &S0     | DSR forced high                             |
          |--------------+---------------------------------------------|
          |     &S1      | DSR is off in command mode, on in on-line   |
          |              | mode                                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 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                                     |
          |------------------------------------------------------------|
          |    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    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                            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                   |
          |--------------+---------------------------------------------|
          |      DP      | Pulse dialing enabled                       |
          |--------------+---------------------------------------------|
          |      DR      | Originate calls in answer mode              |
          |--------------+---------------------------------------------|
          |     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.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    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)                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     REPORT INFORMATION                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] In [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays information requested              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      I0      | Reports modem model and speed               |
          |--------------+---------------------------------------------|
          |      I1      | Reports ROM checksum                        |
          |--------------+---------------------------------------------|
          |      I2      | Reports internal memory test                |
          |--------------+---------------------------------------------|
          |      I3      | Reports device ID                           |
          |--------------+---------------------------------------------|
          |      I4      | Reports internal ID                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SPEAKER VOLUME                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] Ln [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Controls speaker volume                     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      L0      | Low volume setting                          |
          |--------------+---------------------------------------------|
          |      L1      | Low volume setting                          |
          |--------------+---------------------------------------------|
          |     í L2     | Medium volume setting                       |
          |--------------+---------------------------------------------|
          |      L3      | Highest volume setting                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       TRELLIS CODING                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] &Un [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls trellis coding                     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     &U0      | Trellis coding enabled                      |
          |--------------+---------------------------------------------|
          |     &U1      | Trellis coding disabled                     |
          +------------------------------------------------------------+
       
                             Extended AT Command Set
       
          +------------------------------------------------------------+
          |                   AUTO FALL FORWARD/BACK                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Gn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the auto fall forward/back         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %G0      | Enable auto fall forward/back               |
          |--------------+---------------------------------------------|
          |     %G1      | Disable auto fall forward/back              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CONNECT MODE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Nn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the type of connection the modem   |
          |              | will operate in                             |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \N0      | Normal data-link only                       |
          |--------------+---------------------------------------------|
          |     \N1      | Direct data-link only                       |
          |--------------+---------------------------------------------|
          |     \N2      | MNP data-link only                          |
          |--------------+---------------------------------------------|
          |     \N3      | V.42/MNP/Normal data-link only              |
          |--------------+---------------------------------------------|
          |     \N4      | V.42 data-link only                         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   EXTENDED RESULT CODES                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Vn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Selects extended result codes               |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     \V0      | Do not send extended responses              |
          |--------------+---------------------------------------------|
          |     \V1      | Send extended response set 1                |
          |--------------+---------------------------------------------|
          |     \V2      | Send extended response set 2                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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 |
          |--------------+---------------------------------------------|
          |     \Q2      | CTS flow control by DCE enabled             |
          |--------------+---------------------------------------------|
          |     \Q3      | Bidirectional RTS/CTS flow control enabled  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      INACTIVITY TIMER                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] \Tn [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0-9                                         |
          |--------------+---------------------------------------------|
          | Unit:        | 1 second                                    |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of time that the modem does |
          |              | not receive information before it           |
          |              | disconnects.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                MNP CLASS 5 DATA COMPRESSION                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %Cn [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the MNP class 5 data compression   |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %C0      | Disable MNP class 5 data compression        |
          |--------------+---------------------------------------------|
          |     %C1      | Enable MNP class 5 data compression         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    V.22bis AUTO-RETRAIN                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] %En [cmds]                        |
          |--------------+---------------------------------------------|
          | Description: | Controls the V.22bis auto-retrain           |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |     %E0      | V.22bis auto-retrain disabled               |
          |--------------+---------------------------------------------|
          |     %E1      | V.22bis auto-retrain enabled                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     V.42bis DATA BLOCK                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] "On [cmds]                        |
          |--------------+---------------------------------------------|
          | Default:     | 16                                          |
          |--------------+---------------------------------------------|
          | Range:       | 6-250                                       |
          |--------------+---------------------------------------------|
          | Description: | Set maximum V.42bis data block size to n.   |
          |              | Default is 16 (n=6-250)                     |
          +------------------------------------------------------------+
       
                          STANDARD AT# VOICE COMMAND SET
       
          +------------------------------------------------------------+
          |                         BEEP TONE                          |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VBP [cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Generate beep tone                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         VOICE MODE                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VCL=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Voice mode selection. Default is 0          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    COMMAND MODE SILENCE                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VSCD=n [cmds]                    |
          |--------------+---------------------------------------------|
          | Description: | Command mode silence detection. Default is  |
          |              | 0                                           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    INPUT PIN SELECTION                     |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] #VGPS=n [cmds]                    |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 7                                       |
          |--------------+---------------------------------------------|
          | Description: | Input pin function selection. Default is 0  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    INPUT PIN CHARACTER                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VGPC=n [cmds]                    |
          |--------------+---------------------------------------------|
          | Description: | Input pin character selection. Default is 0 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         INPUT PINS                         |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VIN                              |
          |--------------+---------------------------------------------|
          | Description: | Read general purpose input pins             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    INITIALIZE PARAMETER                    |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VIP=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Initialize parameter. Default is 0          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   RELAY/SPEAKER CONTROL                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VLN=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Relay/speaker control. Default is 0         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        OUTPUT PINS                         |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] #VOUT=n [cmds]                    |
          |--------------+---------------------------------------------|
          | Description: | Write to output pins. Default is 0          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    TELEPHONE EMULATION                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VPH                              |
          |--------------+---------------------------------------------|
          | Description: | Telephone emulation mode                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         PLAY LEVEL                         |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VPL=n                            |
          |--------------+---------------------------------------------|
          | Description: | Play level. Default is 0                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         PLAY MODE                          |
          |------------------------------------------------------------|
          | Format:      | AT [cmds] #VPY                              |
          |--------------+---------------------------------------------|
          | Description: | Play mode                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        RECORD MODE                         |
          |------------------------------------------------------------|
          | Format       | AT [cmds] #VRD                              |
          |--------------+---------------------------------------------|
          | Description: | Record mode                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        RECORD LEVEL                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VRL=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 127                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the recording level                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                RECORDING SILENCE THRESHOLD                 |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VSL=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 127                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the recording silence threshold level  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SAMPLING MODE                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VSM=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | CL1                                         |
          |--------------+---------------------------------------------|
          | Description: | Sets the sampling mode                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  RECORD "Q" SILENCE TIME                   |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VSQT=n [cmds]                    |
          |--------------+---------------------------------------------|
          | Default:     | 60                                          |
          |--------------+---------------------------------------------|
          | Description: | Record "q" silence time.                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    VOICE SAMPLING RATE                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VSR=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the sampling rate used when recording  |
          |              | voice signals.                              |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |  #VSR=7200   | Selects a sampling rate of 7.2KHz.          |
          |--------------+---------------------------------------------|
          |  #VSR=11025  | Selects a sampling rate of 11.025KHz in PCM |
          |              | encoding only.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  RECORD "s" SILENCE TIME                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VSST=n [cmds]                    |
          |--------------+---------------------------------------------|
          | Default:     | 60                                          |
          |--------------+---------------------------------------------|
          | Description: | Record the "s" silence time                 |
          +------------------------------------------------------------+