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       # UNIQUE HARDWARE CO., LTD.
       
          DIGIPHONE 34F
       
          Card Type              Modem (synchronous/asynchronous)        
          Chipset                Unidentified                            
          I/O Options            Voice, speakerphone, DSVD               
          Maximum Data Rate      28.8Kbps                                
          Maximum Fax Rate       14.4Kbps                                
          Data Modulation        Bell 103A, 212A                         
                                                                         
                                 ITU-T V.21, V.22, V.22bis, V.32,        
                                 V.32bis, V.34                           
                                                                         
                                 Rockwell V.FC                           
          Fax Modulation         ITU-T V.17, V.27ter, V.29               
          Error                  MNP5, V.42, V.42bis                     
          Correction/Compression 
          Fax Class              Class I & II                            
          Data Bus               Serial                                  
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Function       | Label |      Function       | Label |
          |----------------------+-------+---------------------+-------|
          | DC power in          |  CN1  | Telephone line in   |  CN4  |
          |----------------------+-------+---------------------+-------|
          | Serial port          |  CN2  | Power switch        |  SW1  |
          |----------------------+-------+---------------------+-------|
          | Telephone line out   |  CN3  |                     |       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |  LED   | Color |  Status  |           Condition            |
          |--------+-------+----------+--------------------------------|
          | TM/FAX | Green |    On    | Modem is connected in FAX mode |
          |--------+-------+----------+--------------------------------|
          | TM/FAX | Green | Blinking |     Modem is in test mode      |
          |--------+-------+----------+--------------------------------|
          | TM/FAX | Green |   Off    | Modem is not connected in FAX  |
          |        |       |          |              mode              |
          |--------+-------+----------+--------------------------------|
          |  288   | Green |    On    |  Modem connected at 28.8Kbps   |
          |--------+-------+----------+--------------------------------|
          |  288   | Green |   Off    | Modem connected at slower than |
          |        |       |          |            28.8Kbps            |
          |--------+-------+----------+--------------------------------|
          |  144   | Green |    On    | Modem connected at 14.4Kbps or |
          |        |       |          |             faster             |
          |--------+-------+----------+--------------------------------|
          |  144   | Green |   Off    | Modem connected at slower than |
          |        |       |          |            14.4Kbps            |
          |--------+-------+----------+--------------------------------|
          |   24   | Green |    On    | Modem connected at 2400bps or  |
          |        |       |          |            1200bps             |
          |--------+-------+----------+--------------------------------|
          |   24   | Green |   Off    | Modem not connected at 2400bps |
          |        |       |          |           or 1200bps           |
          |--------+-------+----------+--------------------------------|
          |   EC   | Green |    On    |    Error correction enabled    |
          |--------+-------+----------+--------------------------------|
          |   EC   | Green |   Off    |   Error correction disabled    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DIAGNOSTIC LED(S) (CON'T)                  |
          |------------------------------------------------------------|
          |  LED  | Color  |  Status  |           Condition            |
          |-------+--------+----------+--------------------------------|
          |  AA   | Green  |    On    |      Auto-answer enabled       |
          |-------+--------+----------+--------------------------------|
          |  AA   | Green  |   Off    |      Auto-answer disabled      |
          |-------+--------+----------+--------------------------------|
          |  AA   | Green  | Blinking |        Phone is ringing        |
          |-------+--------+----------+--------------------------------|
          |  CD   | Green  |    On    |    Carrier signal detected     |
          |-------+--------+----------+--------------------------------|
          |  CD   | Green  |   Off    |  Carrier signal not detected   |
          |-------+--------+----------+--------------------------------|
          |  OH   | Green  |    On    |       Modem is off-hook        |
          |-------+--------+----------+--------------------------------|
          |  OH   | Green  |   Off    |        Modem is on-hook        |
          |-------+--------+----------+--------------------------------|
          |  OH   | Green  | Blinking | Modem is dialing in pulse mode |
          |-------+--------+----------+--------------------------------|
          |  SD   | Green  |    On    |   Modem is transmitting data   |
          |-------+--------+----------+--------------------------------|
          |  SD   | Green  |   Off    | Modem is not transmitting data |
          |-------+--------+----------+--------------------------------|
          |  RD   | Green  |    On    |    Modem is receiving data     |
          |-------+--------+----------+--------------------------------|
          |  RD   | Green  |   Off    |  Modem is not receiving data   |
          |-------+--------+----------+--------------------------------|
          |  TR   | Green  |    On    |       DTR signal is high       |
          |-------+--------+----------+--------------------------------|
          |  TR   | Green  |   Off    |       DTR signal is low        |
          |-------+--------+----------+--------------------------------|
          |  PWR  | Green  |    On    |          Power is on           |
          |-------+--------+----------+--------------------------------|
          |  PWR  | Green  |   Off    |          Power is off          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                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, &M, &P, &Q, &R, &S, &T, &V, &W, &X,    |
          | &Y, &Z                                                     |
          |------------------------------------------------------------|
          |                    Extended AT Commands                    |
          |------------------------------------------------------------|
          | \A, \B, \G, \K, \L, \N                                     |
          |------------------------------------------------------------|
          | %C, %E, %L, %Q                                             |
          |------------------------------------------------------------|
          |                    Special AT Commands                     |
          |------------------------------------------------------------|
          | #CID, +MS                                                  |
          |------------------------------------------------------------|
          |                        S-Registers                         |
          |------------------------------------------------------------|
          | S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12,     |
          | S14, S16, S18, S21, S22, S23, S25, S26                     |
          |------------------------------------------------------------|
          | S27, S29, S30, S31, S32, S33, S36, S38, S40, S41, S46,     |
          | S48, S82, S86, S95                                         |
          |------------------------------------------------------------|
          |      Note: See MHI help file for complete information.     |
          +------------------------------------------------------------+
       
                            Proprietary AT Command Set
       
          +------------------------------------------------------------+
          |                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.                              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         DSVD MODE                          |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] -SSE=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Select whether the modem will use DSVD      |
          |              | mode.                                       |
          |--------------+---------------------------------------------|
          |   Command    |                  Function                   |
          |--------------+---------------------------------------------|
          |   í -SSE=0   | DSVD mode disabled.                         |
          |--------------+---------------------------------------------|
          |    -SSE=1    | DSVD mode enabled.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       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=2    | Modem will operate in fax class 2 mode.     |
          |--------------+---------------------------------------------|
          |    #CLS=8    | Modem will operate in voice mode.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       TONE DETECTION                       |
          |------------------------------------------------------------|
          | Format:        | AT [cmds] #VTD=x,y,z [cmds]               |
          |----------------+-------------------------------------------|
          | Default:       | x,y,z 3F                                  |
          |----------------+-------------------------------------------|
          | Range:         | 0 - 3F (hexadecimal)                      |
          |----------------+-------------------------------------------|
          | Description:   | Sets which tones the tone detection will  |
          |                | report.                                   |
          |----------------+-------------------------------------------|
          | Note:          | The value of x sets the tone detection    |
          |                | modes in voice transmit mode, y sets them |
          |                | in voice receive mode, and z sets them in |
          |                | voice command mode.                       |
          |------------------------------------------------------------|
          |   Bit   | Value  |                Function                 |
          |---------+--------+-----------------------------------------|
          |    0    |      0 | DTMF tones are not detected.            |
          |         |        |                                         |
          |         |    í 1 | DTMF tones are detected.                |
          |------------------------------------------------------------|
          |      1      |    0 | V.25 1300Hz calling tone is not       |
          |             |      | detected.                             |
          |             |  í 1 |                                       |
          |             |      | V.25 1300Hz calling tone is detected. |
          |-------------+------+---------------------------------------|
          |      2      |    0 | T.30 1100Hz fax tone is not detected. |
          |             |      |                                       |
          |             |  í 1 | T.30 1100Hz fax tone is detected.     |
          |-------------+------+---------------------------------------|
          |      3      |    0 | V.25/T.30 2100Hz answer tone is not   |
          |             |      | detected.                             |
          |             |  í 1 |                                       |
          |             |      | V.25/T.30 2100Hz answer tone is       |
          |             |      | detected.                             |
          |-------------+------+---------------------------------------|
          |      4      |    0 | Bell 2225Hz answer tone is not        |
          |             |      | detected.                             |
          |             |  í 1 |                                       |
          |             |      | Bell 2225Hz answer tone is detected.  |
          |-------------+------+---------------------------------------|
          |      5      |    0 | Call progress tones are not detected. |
          |             |      |                                       |
          |             |  í 1 | Call progress tones are detected.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               TONE GENERATOR - DIRECT ENTRY                |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VTS=[m, n, x]                    |
          |--------------+---------------------------------------------|
          | Range:       | m 200-3000, n 200-3000, x 0-255             |
          |--------------+---------------------------------------------|
          | Unit:        | m 1 Hz, n 1 Hz, x .1 second                 |
          |--------------+---------------------------------------------|
          | Description: | Generates a dual-frequency tone for         |
          |              | duration x at frequencies m and n.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             TONE GENERATOR - TIMED PHONE KEYS              |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VTS={a, n}                       |
          |--------------+---------------------------------------------|
          | Range:       | a 0-9, A-D, #, *; x 0-255                   |
          |--------------+---------------------------------------------|
          | Unit:        | n .1 second                                 |
          |--------------+---------------------------------------------|
          | Description: | Generates the DTMF tone for duration x for  |
          |              | the character a.                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                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 BUFFER SPACE                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VSK=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 255                                         |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | 1 byte                                      |
          |--------------+---------------------------------------------|
          | Description: | Sets the amount of data the modem can send  |
          |              | into the buffer after the XOFF signal is    |
          |              | sent.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        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=5    | Headset used for voice I/O.                 |
          |--------------+---------------------------------------------|
          |    #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 - DISPLAY COMPRESSION TYPE              |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VCI? [cmds]                      |
          |--------------+---------------------------------------------|
          | Description: | Displays the type of compression currently  |
          |              | in use.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              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 RECEIVE                        |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VRX                              |
          |--------------+---------------------------------------------|
          | Description: | Commands the modem to begin receiving voice |
          |              | data.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   VOICE RING DETECT TIME                   |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VRN=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | Unidentified                                |
          |--------------+---------------------------------------------|
          | Unit:        | Unidentified                                |
          |--------------+---------------------------------------------|
          | 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.                                   |
          |--------------+---------------------------------------------|
          |   í #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                   |
          |--------------+---------------------------------------------|
          | í #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 TIME                |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VSP=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | Unidentified                                |
          |--------------+---------------------------------------------|
          | Range:       | 0 - 255                                     |
          |--------------+---------------------------------------------|
          | Unit:        | .1 second                                   |
          |--------------+---------------------------------------------|
          | Description: | Sets the minimum amount of silence that the |
          |              | modem will detect.                          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             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 TIMING MARK                      |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VTM=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Description: | Configures timing mark placement.           |
          |------------------------------------------------------------|
          |    Command     |                 Function                  |
          |----------------+-------------------------------------------|
          |     #VTM=0     | Timing marks disabled.                    |
          |----------------+-------------------------------------------|
          |    #VTM=10     | Timing marks enabled at 1 second          |
          |                | intervals.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  VOICE TRANSMISSION LEVEL                  |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #TL=hhhh [cmds]                   |
          |--------------+---------------------------------------------|
          | Default:     | 3F44 for phone line, 7FFF for handset or    |
          |              | speaker                                     |
          |--------------+---------------------------------------------|
          | Range:       | 0000 - 7FFF                                 |
          |--------------+---------------------------------------------|
          | Unit:        | Unidentified (hexadecimal)                  |
          |--------------+---------------------------------------------|
          | Description: | Sets the transmission level for sending     |
          |              | audio in voice mode.                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       VOICE TRANSMIT                       |
          |------------------------------------------------------------|
          | Type:        | Immediate                                   |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VTX                              |
          |--------------+---------------------------------------------|
          | Description: | Commands the modem to begin transmitting    |
          |              | voice data.                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     VOICE VOLUME LEVEL                     |
          |------------------------------------------------------------|
          | Type:        | Configuration                               |
          |--------------+---------------------------------------------|
          | Format:      | AT [cmds] #VGT=n [cmds]                     |
          |--------------+---------------------------------------------|
          | Default:     | 153                                         |
          |--------------+---------------------------------------------|
          | Range:       | 128 - 228                                   |
          |--------------+---------------------------------------------|
          | Unit:        | Unidentified                                |
          |--------------+---------------------------------------------|
          | Description: | Sets the volume level when playing back     |
          |              | audio signals.                              |
          +------------------------------------------------------------+
       
        See UNIQUE HARDWARE, INC. FAXSENGER 34 for a full command summary.