
COMPUTER PERIPHERALS, INC.

VIVA 24M

Modem Type                   Data (synchronous/asynchronous)
Maximum Data Rate            2400bps
Data Bus                     External
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.21, V.22, V.22bis
Error Correction/Compression MNP5

[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         Blinking          Loopback tests enabled

     MR          Red            On                  Power is on

     MR          Red            Off                 Power is off

  Note: The LEDs are Icons.

                         Proprietary AT Command Set

                           ACCEPT RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \U

  Example:       AT \U <CR>

  Description:   Accepts remote modems request for reliable link.

                     AUTO-RELIABLE FALLBACK CHARACTER

  Type:              Configuration

  Format:            AT [cmds] %An [cmds]

  Example:           AT %A0 <CR>

  Default:           Unidentified

  Range:             0-127

  Unit:              ASCII

  Description:       Sets the character used as the auto-reliable
                     fallback character. %A0 will disable this function.

                  AUTO-RELIABLE TIME BUFFER CONFIGURATION

  Type:            Configuration

  Format:          AT [cmds] \Cn [cmds]

  Example:         AT \C0 &W<CR>

  Description:     Controls the handling of incoming data during
                   auto-reliable time period.

     Command                              Function

   \CO            Data is discarded.

       \C1         Data is buffered.

       \C2         Data is discarded, sets to normal mode and sends
                   auto-reliable character to serial port.

                                BREAK SEND

  Type:          Configuration

  Format:        AT [cmds] \Bn [cmds]

  Example:       AT \B3 <CR>

  Default:       3

  Range:         1-9

  Unit:          .1 second

  Description:   Sends break to modem.

                                   BREAK TYPE

  Type:          Configuration

  Format:        AT [cmds] \Kn [cmds]

  Example:       AT \K5 <CR>

  Description:   Configures action of break signal.

    Command      Break from DTE     Break from      Break from         Modem
                                        DTE        remote modem    receives \B
                 Reliable/Normal
                      mode         Direct mode

  \K0            Enter command     Send break to   Buffers         Buffers
                 mode, do not      remote modem    cleared and     cleared and
                 send break to     immediately,    break sent to   break sent to
                 remote modem.     then enter      DTE.            remote modem.
                                   command mode.

  \K1            Buffers cleared   Send break to   Buffers         Buffers
                 and break sent    remote modem    cleared and     cleared and
                 to remote         immediately.    break sent to   break sent to
                 modem.                            DTE.            remote modem.

  \K2            Enter command     Send break to   Send break to   Send break to
                 mode, do not      remote modem    DTE             remote modem
                 send break to     immediately,    immediately.    immediately.
                 remote modem.     then enter
                                   command mode.

  \K3            Send break to     Send break to   Send break to   Send break to
                 remote modem      remote modem    DTE             remote modem
                 immediately.      immediately.    immediately.    immediately.

  \K4            Enter command     Send break to   Break sent      Send break to
                 mode, do not      remote modem    with received   remote modem
                 send break to     immediately,    data to the     with
                 remote modem.     then enter      DTE.            transmitted
                                   command mode.                   data.

   \K5          Send break with   Send break to   Break sent      Send break to
                 transmitted       remote modem    with received   remote modem
                 data.             immediately.    data to the     with
                                                   DTE.            transmitted
                                                                   data.

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Example:       AT %C1 <CR>

  Description:   Selects data compression.

    Command                              Function

  %C0            Data compression disabled.

   %C1          Data compression enabled.

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Example:       AT \N1 <CR>

  Description:   Sets connect mode.

  Command                                Function

  \N0            Normal mode enabled.

   \N1          Direct mode enabled.

  \N2            Reliable mode enabled.

  \N3            Auto-reliable mode enabled.

                         CONVERT TO RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \Y

  Example:       AT \Y <CR>

  Description:   Initiates reliable mode link.

                      DISPLAY CURRENT COMMAND STATUS

  Type:          Immediate

  Format:        AT [cmds] \S [cmds]

  Example:       AT \S <CR>

  Description:   Displays current setting of modem commands.

                                 ECHO DATA

  Type:          Configuration

  Format:        AT [cmds] \En [cmds]

  \Example:      AT \E0 <CR>

  Description:   Enables modem to echo received data.

    Command                              Function

   \E0          Data echo disabled.

      \E1        Data echo enabled.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] \Gn [cmds]

  Example:       AT \G0 <CR>

  Description:   Selects modem port flow control.

    Command                              Function

   \G0          Flow control disabled.

      \G1        Flow control enabled.

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] \Qn [cmds]

  Example:       AT \Q0 <CR>

  Description:   Sets type of flow control used by modem.

  Command                                Function

   \Q0          Flow control disabled.

  \Q1            XON/XOFF flow control enabled.

  \Q2            CTS flow control to DTE enabled.

  \Q3            RTS/CTS flow control enabled.

                             INACTIVITY TIMER

  Type:             Configuration

  Format:           AT [cmds] \Tn [cmds]

  Example:          AT\T0 <CR>

  Default:          0

  Range:            0-90

  Unit:             1 minute

  Description:      Sets the length of time that the modem does not
                    receive information before it disconnects.

  Note: \T0 will disable inactivity timer.

                             LOCK SERIAL PORT

  Type:          Configuration

  Format:        AT [cmds] \Jn [cmds]

  Example:       AT \J1 <CR>

  Description:   Sets operation of serial port speed.

  Command                                Function

      \J0        Serial speed locked.

   \J1          Serial speed follows connect speed.

                    MAXIMUM BLOCK SIZE FOR TRANSMISSION

  Type:          Configuration

  Format:        AT [cmds] \An [cmds]

  Example:       AT \A3 %C1<CR>

  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.

                             MNP RESULT CODES

  Type:          Configuration

  Format:        AT [cmds] \Vn [cmds]

  Example:       AT \V1 <CR>

  Description:   Selects MNP result codes.

  Command                                Function

   \V0          MNP result codes disabled.

  \V1            MNP result codes enabled.

                           MNP STREAM/BLOCK MODE

  Type:          Configuration

  Format:        AT [cmds] \Ln [cmds]

  Example:       AT \L0 <CR>

  Description:   Selects the transfer mode for MNP.

    Command                              Function

   \L0          Stream mode for MNP enabled.

      \L1        Block mode for MNP enabled.

                         ON-LINE IN RELIABLE MODE

  Type:          Immediate

  Format:        AT [cmds] \O

  Example:       AT \O <CR>

  Description:   Returns to on-line and requests reliable mode
                 connection.

                            SWITCH TO MNP MODE

  Type:          Immediate

  Format:        AT [cmds] \Z

  Example:       AT \Z <CR>

  Description:   Switches to normal mode from MNP mode.

                           XON/XOFF PASS-THROUGH

  Type:          Configuration

  Format:        AT [cmds] \Xn [cmds]

  Example:       AT \X0 <CR>

  Description:   Selects whether XON/XOFF signals are sent to remote
                 modem.

  Command                                Function

   \X0          XON/XOFF signals trapped by local modem.

  \X1            XON/XOFF passed through local modem.

