
COMPUTER PERIPHERALS, INC.

VIVA 28.8 EXTERNAL DATA/FAX

Modem Type                   Data (synchronous/asynchronous)/Fax
Maximum Data Rate            28.8Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     External
Fax Class                    Class I
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.22, V.22bis, V.23, V.32, V.32bis,
                             V.34

                             Rockwell V.FC
Fax Modulation Protocol      ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression MNP5, MNP10, V.42, V.42bis

[Image]

                                CONNECTIONS

         Purpose             Location          Purpose           Location

  Line out                     CN1       DC power                  CN4

  Line in                      CN2       Power switch              SW1

  RS-232/422                   CN3

                             DIAGNOSTIC LED(S)

    LED         Color         Status                 Condition

     HS          Red            On         Modem is operating at 2400bps

     HS          Red            Off         Modem is operating at slower
                                                    than 2400bps

     AA          Red            On              Auto-answer enabled

     AA          Red            Off             Auto-answer disabled

     AA          Red         Blinking             Phone is ringing

     CD          Red            On            Carrier signal detected

     CD          Red            Off         Carrier signal not detected

     OH          Red            On               Modem is off-hook

     OH          Red            Off               Modem is on-hook

     RD          Red            On            Modem is receiving data

     RD          Red            Off         Modem is not receiving data

     SD          Red            On           Modem is transmitting data

     SD          Red            Off        Modem is not transmitting data

     TR          Red            On               DTR signal is high

     TR          Red            Off              DTR signal is low

     MR          Red            On                  Power is on

     MR          Red            Off                 Power is off

  Note: The LEDs are Icons

                         Proprietary AT Command Set

                        AUTO FALL FORWARD/FALLBACK

  Type:          Configuration

  Format:        AT [cmds] %Gn [cmds]

  Description:   Selects auto fallback

  Command                                Function

   %G0          Fallback disabled

  %G1            Fallback enabled

                    AUTO-RETRAIN - FALLBACK/FALLFORWARD

  Type:          Configuration

  Format:        AT [cmds] %En [cmds]

  Description:   Controls auto-retrain mode and fallback/fall forward

    Command                              Function

      %E0        Auto-retrain disabled

      %E1        Auto-retrain enabled

      %E2        Fallback/fall forward enabled

      %E3        Auto-retrain enabled, modem hangs up when line quality
                 deteriorates.

                          BIT-MAPPED REGISTER S14

  Format                   AT [cmds] S14? [cmds]

  Default:                 Read-only

  Range:                   0-255

  Unit:                    Bit-mapped

  Description:             Displays echo, result codes, result code
                           display, dial mode, and answer/originate mode.

       Bit          Value                      Function

        0             0       Not used

        1              0      Command echo disabled

                      1       Command echo enabled

        2              0      Result codes enabled

                      1       Result codes disabled

        3              0      Display result codes in numeric format

                      1       Display result codes in verbose format

        4             0       Not used

        5              0      Tone dial enabled

                      1       Pulse dial enabled

        6             0       Not used

        7              0      Answer mode enabled

                      1       Originate mode enabled

                          BIT-MAPPED REGISTER S21

  Format                     AT [cmds] S21? [cmds]

  Default:                   Read-only

  Range:                     0-255

  Unit:                      Bit-mapped

  Description:               Displays jack type, CTS signal, low DTR
                             action, DCD signal, DSR signal, and the long
                             space disconnect function.

        Bit           Value                      Function

         0               0       Selects RJ-11, RJ-41S, or RJ45S jack

                        1        Selects RJ-12 or RJ-13 jack

         1              0        Not used

         2               0       CTS follows RTS

                        1        CTS forced high

       4, 3             00       DTR signal ignored

                        01       Modem goes to command mode on low DTR

                        10       Modem disconnects on low DTR.
                                 Auto-Answer is disabled
                        11
                                 Modem is initialized on low DTR

         5               0       DCD forced high

                        1        DCD normal

         6               0       DSR forced high

                        1        DSR normal

         7               0       Long Space Disconnect function disabled

                        1        Long Space Disconnect function enabled

                          BIT-MAPPED REGISTER S22

  Format                    AT [cmds] S22? [cmds]

  Default:                  Read-only

  Range:                    0-255

  Unit:                     Bit-mapped

  Description:              Displays speaker volume and controls, limits
                            results codes, and make/break pulse ratio.

       Bit           Value                      Function

       1, 0            00       On volume

                       01       Low level volume

                       10       Medium level volume

                       11       High level volume

       3, 2            00       Speaker off

                       01       Speaker off on carrier

                       10       Speaker always on

                       11       Speaker on during handshake

     6, 5, 4           000      Basic result codes only enabled

                       100      Basic and connection speed result codes
                                enabled
                       101
                                Basic and connection speed result codes
                       110      and dialtone detection enabled

                      111       All result codes except dialtone
                                detection enabled

                                All result codes enabled

                          BIT-MAPPED REGISTER S23

  Format                    AT [cmds] S23? [cmds]

  Default:                  Read-only

  Range:                    0-255

  Unit:                     Bit-mapped

  Description:              Displays remote digital loopback, DTE rate
                            and parity, and guard tone.

       Bit           Value                      Function

        0               0       Remote digital loopback denied

                       1        Remote digital loopback allowed

     3, 2, 1           000      Sets serial port speed to 0-300bps

                       001      Sets serial port speed to 600bps

                       010      Sets serial port speed to 1200bps

                       011      Sets serial port speed to 2400bps

                       100      Sets serial port speed to 4800bps

                       101      Sets serial port speed to 9600bps

                       110      Sets serial port speed to 19200bps

                      111       Sets serial port speed to 38400bps

       5,4             0        Not used

       7, 6            00       Guard tone disabled

                       01       Guard tone 550Hz enabled

                       10       Guard tone 1800Hz enabled

                          BIT-MAPPED REGISTER S27

  Format                  AT [cmds] S27? [cmds]

  Default:                Read-only

  Range:                  0-255

  Unit:                   Bit-mapped

  Description:            Displays synchronous/asynchronous mode, Line
                          type, clock source, and ITU-T/Bell modes.

       Bit          Value                      Function

     3, 1, 0         000     Asynchronous mode, serial port speed follows
                             connect speed
                     001
                             Asynchronous command mode and synchronous
                     010     connect mode

                     011     Asynchronous command mode and synchronous
                             connect mode
                     100
                             Asynchronous command mode on low DTR,
                             synchronous connect mode on high DTR

                             Hayes AutoSync&trade; mode

        2             0      Dial up line

                      1      Leased line

      5, 4            00     Internal transmit clock source

                      01     External transmit clock source

                     10      Remote transmit clock source

        6             0      CCITT mode

                      1      Bell mode

                          BIT-MAPPED REGISTER S28

  Format                    AT [cmds] S28=n [cmds]

  Default:                  Read-only

  Range:                    0-255

  Unit:                     Bit-mapped

  Description:              Displays V.23 split baud mode, V.23
                            speed/direction, pulse dialing, and MNP10
                            link negoiation.

       Bit           Value                      Function

        0               0      V.23 split baud mode disabled

                       1       V.23 split baud mode enabled

        1               0      Select 75bps transmit, 1200bps receive

                       1       Select 1200bps transmit, 75bps receive

        2              0       Not used

       4, 3            00      39ms make/61ms break at 10pps

                       01      33ms make/67ms break at 10pps

                       10      39ms make/61ms break at 20pps

                       11      33ms make/67ms break at 20pps

        5              0       Not used

       7, 6            00      Link will be negotiated at highest
                               possible speed
                       01
                               Link will be negotiated at 1200bps
                       10
                               Link will be negotiated at 4800bps

                          BIT-MAPPED REGISTER S31

  Format                AT [cmds] S31=n [cmds]

  Default:              Read-only

  Range:                0-255

  Unit:                 Bit-mapped

  Description:          Displays auto-baud function and result codes.

     Bit         Value                        Function

      0            0       Not used

      1             0      Auto-baud disabled

                   1       Auto-baud enabled

     3, 2          00      DTE speed displayed in result codes

                   01      Extended result codes enabled; DCE speed
                           displayed in result codes.
                   10
                           DCE speed displayed in result codes

                          BIT-MAPPED REGISTER S40

  Format                AT [cmds] S40=n [cmds]

  Default:              Read-only

  Range:                0-255

  Unit:                 Bit-mapped

  Description:          Displays MNP10 services, break control, and MNP
                        block size.

     Bit         Value                        Function

     1, 0          00      MNP10 disabled

                   01      MNP10 enabled

                   10      MNP10 enabled on originate mode only

      0             0      MNP10 disabled

                   1       MNP10 enabled

      1             0      MNP10 at 2400 and 1200bps disabled

                   1       MNP10 at 2400 and 1200bps enabled

      2             0      Power level adjustment disabled

                   1       Power level adjustment enabled

    5 - 3          000     \K0

                   001     \K1

                   010     \K2

                   100     \K3

                   101     \K4

                  110      \K5

     7, 6          00      MNP block size is 64 characters

                   01      MNP block size is 128 characters

                   10      MNP block size is 192 characters

                   11      MNP block size is 256 characters

                          BIT-MAPPED REGISTER S41

  Format                   AT [cmds] S41=n [cmds]

  Default:                 Read-only

  Range:                   0-255

  Unit:                    Bit-mapped

  Description:             Displays compression, auto-retrain, flow
                           control, stream/block mode and MNP10 fallback.

       Bit           Value                      Function

       1, 0            00      Data compression disabled

                       01      MNP5 enabled

                       10      V.42bis enabled

                      11       MNP5 and V.42bis enabled

       6, 2            00      Auto-retrain disabled

                       01      Auto-retrain enabled

                      10       %E2

        3              0       Flow control disabled

                       1       Flow control enabled

        4              0       Stream mode for MNP

                       1       Block mode for MNP

        7              0       MNP10 at 2400 and 1200bps disabled

                       1       MNP10 at 2400 and 1200bps enabled

                                BREAK SEND

  Type:          Configuration

  Format:        AT [cmds] \Bn [cmds]

  Default:       Unidentified

  Range:         0-9

  Unit:          .1 second

  Description:   Sends break to modem

                                BREAK TYPE

  Type:            Configuration

  Format:          AT [cmds] \Kn [cmds]

  Description:     Configures action of break signal

     Command        Break from DTE     Modem receives     Break received
                                             \B             from remote
                                                              modem

       \K0         Online command     Break sent to      Buffers cleared,
                   mode enabled,      remote modem and   break sent to
                   send no break to   buffered cleared   DTE
                   remote modem

       \K1         Break sent to      Break sent to      Buffers cleared,
                   remote modem and   remote modem and   break sent to
                   buffered cleared   buffered cleared   DTE

       \K2         Online command     Send break to      Break sent
                   mode enabled,      remote modem       immediately to
                   send no break to   immediately        DTE
                   remote modem

       \K3         Send break to      Send break to      Break sent
                   remote modem       remote modem       immediately to
                   immediately        immediately        DTE

       \K4         Online command     Send break with    Break sent with
                   mode enabled,      transmitted data   received data to
                   send no break to                      the DTE
                   remote modem

   \K5            Send break with    Send break with    Break sent with
                   transmitted data   transmitted data   received data to
                                                         the DTE

                        CELLULAR TRANSMISSION LEVEL

  Type:          Register

  Format:        AT [cmds] S201=n [cmds]

  Default:       10

  Range:         0-15

  Unit:          -1 dBm

  Description:   Controls cellular transmission level

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Description:   Selects data compression

    Command                              Function

      %C0        Data compression disabled

      %C1        MNP5 enabled

      %C2        V.42bis enabled

   %C3          Both MNP5 AND V.42bis enabled

                           COMPROMISE EQUALIZER

  Type:          Configuration

  Format:        AT [cmds] :En [cmds]

  Description:   Controls V.32 compromise equalizer

  Command                                Function

  :E0            Equalizer disabled

   :E1          Equalizer enabled

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Description:   Sets connect mode

    Command                              Function

      \N0        Normal mode enabled

      \N1        Direct mode enabled

      \N2        Reliable mode enabled

   \N3          Auto-reliable mode enabled

      \N4        LAPM mode enabled

      \N5        MNP mode enabled

                          FAX TRANSMISSION LEVEL

  Type:          Register

  Format:        AT [cmds] S92=n [cmds]

  Default:       10

  Range:         0-15

  Unit:          -1 dBm

  Description:   Controls fax transmission level

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Gn [cmds]

  Description:   Selects modem port flow control

    Command                              Function

   \G0          Flow control disabled

      \G1        Flow control enabled

                       FLOW CONTROL CHARACTER - XON

  Type:          Register

  Format:        AT [cmds] S32=n [cmds]

  Default:       17

  Range:         0-255

  Unit:          ASCII

  Description:   Sets the character used to represent XON

                       FLOW CONTROL CHARACTER - XOFF

  Type:          Register

  Format:        AT [cmds] S33=n [cmds]

  Default:       19

  Range:         0-255

  Unit:          ASCII

  Description:   Sets the character used to represent XOFF

                      LEASED LINE TRANSMISSION LEVEL

  Type:          Register

  Format:        AT [cmds] S99=n [cmds]

  Default:       10

  Range:         0-15

  Unit:          -1 dBm

  Description:   Controls leased-line transmission level

                             LINE SIGNAL LEVEL

  Type:          Immediate

  Format:        AT [cmds] %L [cmds]

  Range:         9-43

  Unit:          -1dBm

  Description:   Returns received line signal level

                    MAXIMUM BLOCK SIZE FOR TRANSMISSION

  Type:          Configuration

  Format:        AT [cmds] \An [cmds]

  Description:   Sets the maximum transmittable block size

  Command                                Function

  \A0            MNP block size is 64 characters

   \A1          MNP block size is 128 characters

  \A2            MNP block size is 192 characters

      \A3        MNP block size is 256 characters

                             MNP10 COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] -Kn [cmds]

  Description:   Selects MNP10 data compression

  Command                                Function

      -K0        MNP10 disabled

   -K1          MNP10 enabled

      -K2        MNP10 enabled on originate mode only

                              MNP10 FALL-BACK

  Type:          Configuration

  Format:        AT [cmds] -Qn [cmds]

  Description:   Allows MNP10 to fall back to speeds slower than 4800bps

  Command                                Function

      -Q0        MNP10 at 2400 and 1200bps disabled

   -Q1          MNP10 at 2400 and 1200bps enabled

                          MNP10 LINK NEGOTIATION

  Type:          Configuration

  Format:        AT [cmds] *Hn [cmds]

  Description:   Sets the speed at which MNP10 link negotiation will
                 occur

  Command                                Function

   *H0          Link will be negotiated at highest possible speed

  *H1            Link will be negotiated at 1200bps

                         MNP10 POWER LEVEL ADJUST

  Type:           Configuration

  Format:         AT [cmds] )Mn [cmds]

  Description:    Controls automatic transmit power level adjustment
                  during MNP 10 link negotiation

  Command                                Function

   )M0           Power level adjustment disabled

  )M1             Power level adjustment enabled

                      REMOTE ACCESS ESCAPE CHARACTER

  Type:          Register

  Format:        AT [cmds] S202=n [cmds]

  Default:       Unidentified

  Range:         0-255

  Unit:          ASCII

  Description:   Sets the remote access escape character

                        REPORT LINE SIGNAL QUALITY

  Type:          Immediate

  Format:        AT [cmds] %Q [cmds]

  Description:   Returns line signal quality

                                SLEEP TIMER

  Type:             Register

  Format:           AT [cmds] S24=n [cmds]

  Default:          0

  Range:            0-255

  Unit:             1 second

  Description:      Maximum duration of DTE and DCE inactivity allowed
                    prior to initiating low-power sleep mode

                        SWITCHED TRANSMISSION LEVEL

  Type:          Register

  Format:        AT [cmds] S91=n [cmds]

  Default:       10

  Range:         0-15

  Unit:          -1 dBm

  Description:   Controls switched transmission level

                                TEST MODES

  Format                 AT [cmds] S16? [cmds]

  Default:               Read-only

  Range:                 0-255

  Unit:                  Bit-mapped

  Description:           Displays loopback tests, analog, digital, remote
                         digital, and self tests

      Bit         Value                       Function

       0             0       Local analog loopback not in progress

                    1        Local analog loopback in progress

       1            0        Not used

       2             0       Local digital loopback not in progress

                    1        Local digital loopback in progress

       3             0       Modem not in remote digital loopback

                    1        Remote digital loopback in progress

       4             0       Remote digital loopback not requested

                    1        Remote digital loopback requested

       5             0       Remote digital loopback w/ self-test not in
                             progress
                    1
                             Remote digital loopback w/ self-test in
                             progress

       6             0       Local analog loopback w/ self-test not in
                             progress
                    1
                             Local analog loopback w/ self-test in
                             progress

                            TRANSMISSION LEVEL

  Type:          Configuration

  Format:        AT [cmds] @Mn [cmds]

  Default:       Unidentified

  Range:         11-31

  Unit:          -1 dBm

  Description:   Sets initial transmit power level for transmission

    Command                              Function

      @M0        -26dBm

      @M1        -30dBm

    @M2-@M10     -10dBm

