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       # DATA COMMUNICATIONS TECHNOLOGIES
       
          ULTRALINK V.34 INTERNAL
       
          Card Type              Modem (asynchronous)                    
          Chipset                Rockwell                                
          I/O Options            Microphone in, speaker out, voice,      
                                 speakerphone, SVD                       
          Maximum Data Rate      33.6Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Modulation        Bell 103A, 212A                         
                                                                         
                                 ITU-T V.21, V.22, V.22bis, V.23, V.32,  
                                 V.32bis, V.34                           
                                                                         
                                 Rockwell V.FC                           
          Fax Modulation         ITU-T V.17                              
          Error                  MNP5, MNP10, V.42, V.42bis              
          Correction/Compression 
          Fax Class              Class I                                 
          Data Bus               8/16 bit ISA                            
          Card Size              Full height, half length                
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |        Function        | Label |     Function      | Label |
          |------------------------+-------+-------------------+-------|
          | Telephone line out     |  CN1  | Headphone out     |  CN4  |
          |------------------------+-------+-------------------+-------|
          | Telephone line in      |  CN2  | Speaker out       |  CN5  |
          |------------------------+-------+-------------------+-------|
          | Microphone in          |  CN3  |                   |       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Setting               | Label |   Position    |
          |------------------------------------+-------+---------------|
          | í Factory configured - do not      |  J5   |  Pins 3 & 4   |
          | alter                              |       |    closed     |
          |------------------------------------+-------+---------------|
          | í Plug-N-Play enabled              |  J6   | Pins 2 & 3, 5 |
          |                                    |       |  & 6 closed   |
          |------------------------------------+-------+---------------|
          | Plug-N-Play disabled               |  J6   | Pins 1 & 2, 4 |
          |                                    |       |  & 5 closed   |
          |------------------------------------+-------+---------------|
          | í Internal speaker amplifier       |  J7   |  Pins 1 & 3   |
          | enabled                            |       |    closed     |
          |------------------------------------+-------+---------------|
          | Internal speaker amplifier         |  J7   |  Pins 2 & 4   |
          | disabled                           |       |    closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |    SERIAL PORT ADDRESS SELECTION (PLUG-N-PLAY DISABLED)    |
          |------------------------------------------------------------|
          |    Setting    |   J3/A    |   J3/B    |   J3/C   |  J3/D   |
          |---------------+-----------+-----------+----------+---------|
          | 3F8h (COM1:)  |   Open    |  Closed   |   Open   | Closed  |
          |---------------+-----------+-----------+----------+---------|
          | 2F8h (COM2:)  |   Open    |  Closed   |  Closed  |  Open   |
          |---------------+-----------+-----------+----------+---------|
          | 3E8h (COM3:)  |  Closed   |   Open    |   Open   | Closed  |
          |---------------+-----------+-----------+----------+---------|
          | 2E8h (COM4:)  |  Closed   |   Open    |  Closed  |  Open   |
          +------------------------------------------------------------+
       
       +----------------------------------------------------------------------+
       |              INTERRUPT SELECTION (PLUG-N-PLAY DISABLED)              |
       |----------------------------------------------------------------------|
       |Setting| J4/A | J4/B | J4/C | J4/D | J4/E | J4/F | J4/G | J4/H | J4/I |
       |-------+------+------+------+------+------+------+------+------+------|
       |  2/9  | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       |   3   |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       |   4   | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       |   5   | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       |   7   | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       |  10   | Open | Open | Open | Open | Open |Closed| Open | Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       |  11   | Open | Open | Open | Open | Open | Open |Closed| Open | Open |
       |-------+------+------+------+------+------+------+------+------+------|
       |  12   | Open | Open | Open | Open | Open | Open | Open |Closed| Open |
       |-------+------+------+------+------+------+------+------+------+------|
       |  15   | Open | Open | Open | Open | Open | Open | Open | Open |Closed|
       +----------------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                SUPPORTED STANDARD COMMANDS                 |
          |------------------------------------------------------------|
          |                     Basic AT Commands                      |
          |------------------------------------------------------------|
          | +++, ‘comma’, A/                                           |
          |------------------------------------------------------------|
          | A, B, E, H, L, M, N, O, P, Q, T, V, W, X, Y, Z             |
          |------------------------------------------------------------|
          | &C, &D, &F, &G, &K, &P, &Q, &R, &S, &T, &V, &W, &Y, &Z     |
          |------------------------------------------------------------|
          |                    Extended AT Commands                    |
          |------------------------------------------------------------|
          | \A, \B, \N                                                 |
          |------------------------------------------------------------|
          | %C, %E, %L, %Q                                             |
          |------------------------------------------------------------|
          |                    Special AT Commands                     |
          |------------------------------------------------------------|
          | #CID, -K, +MS                                              |
          |------------------------------------------------------------|
          |                        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, S86, S95                          |
          |------------------------------------------------------------|
          |      Note: See MHI help file for complete information.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   UNIDENTIFIED COMMANDS                    |
          |------------------------------------------------------------|
          |          Command           |            Default            |
          |----------------------------+-------------------------------|
          |             \K             |         Unidentified          |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                            DIAL                            |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] D<#>;[cmds]                       |
          |--------------+---------------------------------------------|
          | Description: | Dials the telephone number indicated        |
          |              | according to any modifiers included in the  |
          |              | string.                                     |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      DL      | Re-dial last number.                        |
          |--------------+---------------------------------------------|
          |      DP      | Pulse dialing enabled.                      |
          |--------------+---------------------------------------------|
          |     DS=n     | Dial stored telephone number n.             |
          |--------------+---------------------------------------------|
          |      DT      | Tone dialing enabled.                       |
          |--------------+---------------------------------------------|
          |      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 Quiet 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^      | Calling tone toggled from current state for |
          |              | this call.                                  |
          |--------------+---------------------------------------------|
          |      D&      | Wait for prompt tone detection function     |
          |              | enabled. Waits for prompt tone for amount   |
          |              | of time specified by the S7 command.        |
          |--------------+---------------------------------------------|
          |      D;      | Modem returned to idle state after dialing. |
          |              | The semicolon can only be placed at the end |
          |              | of the dial command.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                DISPLAY CHIPSET MANUFACTURER                |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #MFR? [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Displays the voice chipset manufacturer’s   |
          |              | name.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DISPLAY CHIPSET MODEL NAME                 |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #MDL? [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Displays the model name of the modem's      |
          |              | voice chipset.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  DISPLAY CHIPSET REVISION                  |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #REV? [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Displays the revision level of the modem's  |
          |              | voice chipset.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DISPLAY INFORMATION                     |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] In [cmds]                         |
          |--------------+---------------------------------------------|
          | Description: | Displays information requested about the    |
          |              | modem.                                      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |      I0      | Displays product identification code.       |
          |--------------+---------------------------------------------|
          |      I1      | Displays least significant byte of ROM      |
          |              | checksum.                                   |
          |--------------+---------------------------------------------|
          |      I2      | Tests and displays ROM checksum result.     |
          |--------------+---------------------------------------------|
          |      I3      | Displays firmware revision.                 |
          |--------------+---------------------------------------------|
          |      I4      | Displays modem identifier.                  |
          |--------------+---------------------------------------------|
          |      I5      | Displays country code.                      |
          |--------------+---------------------------------------------|
          |      I6      | Displays data pump model and revision.      |
          |--------------+---------------------------------------------|
          |      I7      | Displays DAA code.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      DISTINCTIVE RING                      |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] -SDR=n [cmds]                   |
          |----------------+-------------------------------------------|
          | Default:       | Unidentified                              |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 7                                     |
          |----------------+-------------------------------------------|
          | Description:   | Selects which distinctive ring signals    |
          |                | the modem will respond to.                |
          |------------------------------------------------------------|
          |   Bit    | Value |                Function                 |
          |----------+-------+-----------------------------------------|
          |    0     |     0 | Do not respond to distinctive ring type |
          |          |       | 1.                                      |
          |          |     1 |                                         |
          |          |       | Respond to distinctive ring type 1.     |
          |----------+-------+-----------------------------------------|
          |    1     |     0 | Do not respond to distinctive ring type |
          |          |       | 2.                                      |
          |          |     1 |                                         |
          |          |       | Respond to distinctive ring type 2.     |
          |----------+-------+-----------------------------------------|
          |    2     |     0 | Do not respond to distinctive ring type |
          |          |       | 3.                                      |
          |          |     1 |                                         |
          |          |       | Respond to distinctive ring type 3.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         LINE SPEED                         |
          |------------------------------------------------------------|
          | Type:        | Register                                    |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] S37=n [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Selects the line speed the modem will       |
          |              | attempt to connect at.                      |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    S37=0     | Modem will connect at highest common        |
          |              | protocol.                                   |
          |--------------+---------------------------------------------|
          |    S37=1     | Modem will connect at 300bps.               |
          |--------------+---------------------------------------------|
          |    S37=2     | Modem will connect at 300bps.               |
          |--------------+---------------------------------------------|
          |    S37=3     | Modem will connect at 300bps.               |
          |--------------+---------------------------------------------|
          |    S37=5     | Modem will connect at 1200bps.              |
          |--------------+---------------------------------------------|
          |    S37=6     | Modem will connect at 2400bps.              |
          |--------------+---------------------------------------------|
          |    S37=7     | Modem will connect with V.23                |
          |--------------+---------------------------------------------|
          |    S37=8     | Modem will connect at 4800bps.              |
          |--------------+---------------------------------------------|
          |    S37=9     | Modem will connect at 9600bps.              |
          |--------------+---------------------------------------------|
          |    S37=10    | Modem will connect at 12Kbps.               |
          |--------------+---------------------------------------------|
          |    S37=11    | Modem will connect at 14.4Kbps.             |
          |--------------+---------------------------------------------|
          |    S37=12    | Modem will connect at 7200bps.              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       MODE SELECTION                       |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #CLS=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Selects which mode the modem will operate   |
          |              | in.                                         |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    #CLS=0    | Modem will operate in data mode.            |
          |--------------+---------------------------------------------|
          |    #CLS=1    | Modem will operate in fax class 1 mode.     |
          |--------------+---------------------------------------------|
          |    #CLS=8    | Modem will operate in voice mode.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SVD BANDWIDTH                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] -SMS=a,b,c,d [cmds]               |
          |--------------+---------------------------------------------|
          | Description: | Selects the throughput levels allowed for   |
          |              | SVD mode.                                   |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |      a=0      | SVD mode disabled.                         |
          |---------------+--------------------------------------------|
          |      a=2      | SVD mode enabled.                          |
          |---------------+--------------------------------------------|
          |      a=3      | Auto-detect correct mode.                  |
          |---------------+--------------------------------------------|
          |   b,c=4800    | Sets the minimum and maximum combined      |
          |               | voice and data speed to 4800bps,           |
          |               | respectively.                              |
          |---------------+--------------------------------------------|
          |   b,c=7200    | Sets the minimum and maximum combined      |
          |               | voice and data speed to 7200bps,           |
          |               | respectively.                              |
          |---------------+--------------------------------------------|
          |   b,c=9600    | Sets the minimum and maximum combined      |
          |               | voice and data speed to 9600bps,           |
          |               | respectively.                              |
          |---------------+--------------------------------------------|
          |   b,c=12000   | Sets the minimum and maximum combined      |
          |               | voice and data speed to 12Kbps,            |
          |               | respectively.                              |
          |---------------+--------------------------------------------|
          |   b,c=14400   | Sets the minimum and maximum combined      |
          |               | voice and data speed to 14.4Kbps,          |
          |               | respectively.                              |
          |---------------+--------------------------------------------|
          |       d       | Sets the baud rate for ML288 modulation    |
          |               | mode. A setting of 0 will cause the modem  |
          |               | to auto-detect the correct mode, which is  |
          |               | the default.                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       SVD MODULATION                       |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] -SQS=m,n [cmds]                   |
          |--------------+---------------------------------------------|
          | Description: | Selects which modulation type the modem     |
          |              | will use for SVD mode.                      |
          |------------------------------------------------------------|
          |    Command    |                  Function                  |
          |---------------+--------------------------------------------|
          |      m=1      | Selects ML144 modulation.                  |
          |---------------+--------------------------------------------|
          |      m=2      | Selects ML288 modulation.                  |
          |---------------+--------------------------------------------|
          |      n=0      | Modem will not auto-detect the correct     |
          |               | modulation.                                |
          |---------------+--------------------------------------------|
          |      n=1      | Modem will auto-detect the correct         |
          |               | modulation.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                TONE GENERATOR - PHONE KEYS                 |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VTS=a                            |
          |--------------+---------------------------------------------|
          | Range:       | 0-9, A-D, #, *                              |
          |--------------+---------------------------------------------|
          | Description: | Generates the DTMF tones for the characters |
          |              | in the string for the duration set with     |
          |              | +VBT.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   TONE GENERATOR LENGTH                    |
          |------------------------------------------------------------|
          | Format       | AT [cmds] #VBT=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 10                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 40                                      |
          |--------------+---------------------------------------------|
          | Unit:        | 0.1 second                                  |
          |--------------+---------------------------------------------|
          | Description: | Sets the length of DTMF tones that are      |
          |              | generated.                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        VOICE DEVICE                        |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VLS=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Selects the I/O device for the DSP chip.    |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í #VLS=0   | Telephone line and handset used for voice   |
          |              | I/O.                                        |
          |--------------+---------------------------------------------|
          |    #VLS=1    | Telephone handset used for voice I/O.       |
          |--------------+---------------------------------------------|
          |    #VLS=2    | Internal speaker only used for voice I/O.   |
          |--------------+---------------------------------------------|
          |    #VLS=3    | External microphone only used for voice     |
          |              | I/O.                                        |
          |--------------+---------------------------------------------|
          |    #VLS=4    | Telephone line and handset used for voice   |
          |              | I/O; internal speaker enabled.              |
          |--------------+---------------------------------------------|
          |    #VLS=6    | Speakerphone used for voice I/O.            |
          |--------------+---------------------------------------------|
          |    #VLS=7    | Handset muted by disconnecting handset or   |
          |              | speakerphone from telephone line.           |
          |--------------+---------------------------------------------|
          |    #VLS=8    | Connects caller ID relay for recording of   |
          |              | conversation over handset.                  |
          |--------------+---------------------------------------------|
          |    #VLS=9    | Connects handset (or speakerphone) to DSP   |
          |              | chip for recording or playback.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                VOICE - DISPLAY BUFFER SIZE                 |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VBQ? [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Displays the size of the voice buffer.      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              VOICE - LOCAL SERIAL PORT SPEED               |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #BDR=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 0                                           |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 48                                      |
          |--------------+---------------------------------------------|
          | Unit:        | 2400bps                                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the speed of the local serial port     |
          |              | when in voice mode. A value of 0 indicates  |
          |              | that the modem should auto-detect the       |
          |              | correct serial port speed.                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 VOICE RE-RING DETECT TIME                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VRA=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 70                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 -255                                      |
          |--------------+---------------------------------------------|
          | Unit:        | 10 mS                                       |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum time the modem will wait   |
          |              | for the remote station to ring again before |
          |              | it assumes that it has gone off-hook.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   VOICE RING DETECT TIME                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VRN=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 70                                          |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | .1 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Sets the maximum time the modem will wait   |
          |              | for the remote station to ring before it    |
          |              | assumes that it went off-hook before it     |
          |              | rang.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    VOICE SAMPLE QUALITY                    |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VBS=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Selects the number of bits per sample that  |
          |              | the modem records.                          |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    #VBS=2    | Modem records 2 bits per sample in ADPCM    |
          |              | encoding.                                   |
          |--------------+---------------------------------------------|
          |    #VBS=4    | Modem records 4 bits per sample in ADPCM    |
          |              | encoding.                                   |
          |--------------+---------------------------------------------|
          |    #VBS=8    | Modem records 8 bits per sample in PCM      |
          |              | encoding.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    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.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             VOICE SILENCE DETECTION THRESHOLD              |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VSS=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Sets the threshold of sensitivity that the  |
          |              | modem uses to determine silence detection.  |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |    #VSS=0    | Silence detection disabled.                 |
          |--------------+---------------------------------------------|
          |    #VSS=1    | Minimum silence detection sensitivity.      |
          |--------------+---------------------------------------------|
          |    #VSS=2    | Standard silence detection sensitivity.     |
          |--------------+---------------------------------------------|
          |    #VSS=3    | Maximum silence detection sensitivity.      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     VOICE VOLUME LEVEL                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VGT=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 128 - 228                                   |
          |--------------+---------------------------------------------|
          | Unit:        | Unidentified                                |
          |--------------+---------------------------------------------|
          | Description: | Sets the volume level when playing back     |
          |              | audio signals.                              |
          +------------------------------------------------------------+