
MAXTECH CORPORATION

PCM228A (ATTHSM288/PCM288A)

Card Type                    Modem/Fax card
Chip Set                     Unidentified
Maximum Modem Rate           28.8Kbps
Maximum Fax Rate             14.4Kbps
Data Modulation Protocol     Bell 103/212A

                             ITU-T V.22bis, V.22, V.23, V.32, V.32terbo,
                             V.32bis, V.34
Fax Modulation Protocol      ITU-T V.27ter, V.29, V.21
Error Correction/Compression MNP5, V.42bis
Fax Class                    Class I
Data Bus                     PCMCIA

                                                                      54705

                           SUPPORTED COMMAND SET

                             Basic AT Commands

  AT, +++, A/

  A, E, H, M, P, Q, T, V, W, X, Y, Z

  &C, &F, &G, &T, &V, &W, &Y, &Z

                           Extended AT Commands

  \A, \B, \C, \G, \J, \K, \V, \X

  %A, %G

  "O, "H

  -J

                                S Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18,
  S21, S22, S23, S25

  S26, S27, S30, S37, S40, S46



  Note: See MHI Help File for full command documentation.

                         PROPRIETARY AT COMMAND SET

                            AUTO-MODE DETECTION

  Type:                  Configuration

  Format:                AT [cmds] Nn [cmds]

  Description:           Selects various options for the automatic
                         detection and negotiation of protocols during
                         the handshake process if the modem is
                         communicating with a remote modem of dissimilar
                         speed.

        Command                              Function

          N0             Auto-mode detection disabled

          N1             Auto-mode detection enabled

                            COMMUNICATIONS MODE

  Type:          Configuration

  Format:        AT [cmds] &Mn [cmds]

  Description:   Selects communications mode

    Command                                Mode

      &M0        Asynchronous mode

      &M4        Hayes auto-synchronous mode



                            COMMUNICATIONS MODE

  Type:           Configuration

  Format:         AT [cmds] &Qn [cmds]

  Description:    Selects communications mode options

    Command                                Mode

      &Q0         Asynchronous mode, serial port speed follows connect
                  speed.

      &Q4         Auto-synchronous mode

                          COMMUNICATION PROTOCOLS

  Type:          Configuration

  Format:        AT [cmds] Bn [cmds]

  Description:   Selects the communication protocol for data calls

    Command                              Protocol

       B0        CCITT mode

       B1        Bell mode

       B2        ITU-T V.23 originate mode; 75bps transmit, 1200bps
                 receive

       B3        ITU-T V.23 originate mode; 1200bps transmit, 75bps
                 receive

                           DATA SET READY (DSR)

  Type:          Configuration

  Format:        AT [cmds] &Sn [cmds]

  Description:   Selects DSR options

    Command                              Function

      &S0        DSR forced high

      &S1        DSR high only while modem is handshaking or connected

                         DATA TERMINAL READY (DTR)

  Type:          Configuration

  Format:        AT [cmds] &Dn [cmds]

  Description:   Selects modem response to DTR

    Command                              Function

      &D0        DTR override

      &D1        DTR toggle causes online command mode

      &D2        Normal DTR operations

      &D3        Resets on receipt of DTR



                                   DIAL

  Type:                  Immediate

  Format:                AT [cmds] D<#> [cmds]

  Description:           Dials telephone number according to any
                         modifiers included in the string

  Note:                  Any combination of modifiers can be used to
                         produce the desired dial functions in sequence.

        Command                              Function

          DP             Pulse dialing enabled

          DR             Answer mode enabled; originate mode disabled
                         following handshake initiation.

         DS=n            Dial stored telephone number n

          DT             Tone dialing enabled/Pulse dialing disabled

          DW             Dialing resumed following dial tone detection

          D,             Dialing paused for amount of time specified in
                         S8 register

          D!             Flash function initiated. Modem commanded to go
                         off-hook for specified time before returning
                         on-hook.

          D@             Wait for Quite Answer function enabled. Modem
                         waits until a "quiet answer," a ring-back signal
                         followed by 5 seconds of silence

          D;             Modem returned to idle state after dialing. The
                         semicolon can only be placed at the end of the
                         dial command.

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] &Kn [cmds]

  Description:   Enables flow control options

    Command                              Function

      &K0        Flow control disabled

      &K3        RTS/CTS flow control enabled

      &K4        XON/XOFF flow control enabled

                                 LINE TYPE

  Type:          Configuration

  Format:        AT [cmds] &Ln [cmds]

  Description:   Selects line type

    Command                             Line Type

      &L0        Switched line (PSTN/Dial-up)

                                  ON-LINE

  Type:               Immediate

  Format:             AT [cmds] On [cmds]

  Description:        Controls on-line command (data transmission) state
                      options.

      Command                              Function

         O0           On-line command mode with no retraining enabled

         O1           On-line command mode with retraining enabled

       O3-O13         On-line command mode with new user defined rate as
                      specified by register S62



                            PULSE DIALING RATIO

  Type:          Configuration

  Format:        AT [cmds] &Pn [cmds]

  Description:   Selects pulse dial make/break ratio

    Command                              Function

      &P0        39/61ms at 10pps (North America)

      &P1        33/67ms at 10pps (Europe)

                            REPORT INFORMATION

  Type:          Immediate

  Format:        AT [cmds] In [cmds]

  Description:   Displays information requested

    Command                              Function

       I0        Reports four digit product code

       I1        Reports ROM checksum

       I2        Reports internal memory test

       I3        Reports firmware ID

       I4        Reserved

                                  RTS/CTS

  Type:          Configuration

  Format:        AT [cmds] &Rn [cmds]

  Description:   Selects RTS/CTS options

    Command                              Function

      &R0        Reserved

      &R1        CTS forced high, RTS is ignored.

                              SPEAKER VOLUME

  Type:          Configuration

  Format:        AT [cmds] Ln [cmds]

  Description:   Controls speaker volume

    Command                              Function

       L0        Low volume setting

       L1        Low volume setting

       L2        Medium volume setting

       L3        Highest volume setting

                            V.32 - AUTO-RETRAIN

  Type:                  Configuration

  Format:                AT [cmds] &Bn [cmds]

  Description:           Controls auto-retrain function if poor line
                         quality is detected

        Command                              Function

          &B0            Auto-retrain disabled modem hangs-up

          &B1            Auto-retrain enabled if line quality is poor.
                         Hang-up after reaching threshold set in register
                         S7

          &B2            Tolerate any line quality



                          EXTENDED AT COMMAND SET

                                COMPRESSION

  Type:          Configuration

  Format:        AT [cmds] %Cn [cmds]

  Description:   Selects data compression

    Command                              Function

      %C0        Data compression disabled

      %C1        MNP5 enabled

                               CONNECT MODE

  Type:          Configuration

  Format:        AT [cmds] \Nn [cmds]

  Description:   Controls the type of connection the modem will operate
                 in

    Command                              Function

      \N0        Normal mode enabled

      \N1        Direct mode enabled

      \N2        Reliable mode enabled

      \N3        Auto-reliable mode enabled

      \N4        V.42 reliable mode enabled

                                 FIRMWARE

  Type:          Configuration

  Format:        AT [cmds] -Vn [cmds]

  Description:   Display modem firmware virsion

                             FLOW CONTROL TYPE

  Type:          Configuration

  Format:        AT [cmds] \Qn [cmds]

  Description:   Sets type of flow control used by modem

    Command                              Function

      \Q0        Flow control disabled

      \Q1        Bi-directional XON/XOFF flow control enabled

      \Q2        CTS flow control by DCE enabled

      \Q3        Bi-directional RTS/CTS flow control enabled



                             INACTIVITY TIMER

  Type:                  Configuration

  Format:                AT [cmds] \Tn [cmds]

  Range:                 0-90

  Unit:                  1 second

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

                         V.42bis - DICTIONARY SIZE

  Type:          Configuration

  Format:        AT [cmds] "Nn [cmds]

  Description:   Select V.42 dictionary size

    Command                              Function

      "N0        Select 512 bytes

      "N1        Select 1024 bytes

      "N2        Select 1536 bytes

                            S (STATUS) REGISTERS

                            AUTOMATIC FALLBACK

  Type:          Register

  Format         AT [cmds] S43=n [cmds]

  Range:         0-127

  Unit:          ASCII

  Description:   Sets automatic fallback character. Default=13

                            AUTORELIABLE BUFFER

  Type:          Register

  Format         AT [cmds] S48=n [cmds]

  Range:         0-2

  Unit:          Unidentified

  Description:   Controls autoreliable buffer

                          BIT-MAPPED REGISTER S19

  Format         AT [cmds] S19=n [cmds]

  Unit:          Bit-mapped

  Description:   Controls autosync options. Default=26

                          BIT-MAPPED REGISTER S20

  Format         AT [cmds] S20=n [cmds]

  Range:         0-255

  Unit:          Bit-mapped

  Description:   Controls autosync HDLC address. Default=255



                          BIT-MAPPED REGISTER S44

  Format             AT [cmds] S44=n [cmds]

  Unit:              Bit-mapped

  Description:       Determines V.42bis status and automatic fall
                     forward/fallback. Default=7

                          BIT-MAPPED REGISTER S51

  Format         AT [cmds] S51=n [cmds]

  Unit:          Bit-mapped

  Description:   Determines flow control options. Default=3

                          BIT-MAPPED REGISTER S54

  Format         AT [cmds] S54=n [cmds]

  Unit:          Bit-mapped

  Description:   Determines V.23, error correction result code

                               BREAK OPTION

  Type:          Register

  Format         AT [cmds] S52=n [cmds]

  Range:         0-5

  Unit:          Unidentified

  Description:   Controls break options. Default=5

                               BTLZ OPTIONS

  Type:          Register

  Format         AT [cmds] S58=n [cmds]

  Range:         6-64

  Unit:          Bytes

  Description:   Sets BTLZ string length. Default=32

                              CONNECT MESSAGE

  Type:          Register

  Format         AT [cmds] S41=n [cmds]

  Range:         0-2

  Unit:          Unidentified

  Description:   Determines connect message. Default=0

                            DTE RATE SELECTION

  Type:          Register

  Format         AT [cmds] S72=n [cmds]

  Range:         0-18

  Unit:          Unidentified

  Description:   Selects DTE rate



                              DTE RATE STATUS

  Type:          Register

  Format         AT [cmds] S62=n [cmds]

  Range:         0-17

  Unit:          Unidentified

  Description:   Determines DTE rate status. Default=16

                           MNP5 ERROR CORRECTION

  Type:          Register

  Format         AT [cmds] S59=n [cmds]

  Range:         0-1

  Unit:          Unidentified

  Description:   Sets MNP5 error correction

                             POWER-UP PROFILE

  Type:          Register

  Format         AT [cmds] S98=n [cmds]

  Range:         0, 1

  Unit:          Unidentified

  Description:   Sets power-up profile

                             ROUND TRIP DELAY

  Type:          Register

  Format         AT [cmds] S65=n [cmds]

  Range:         Unidentified

  Unit:          .1second

  Description:   Sets round trip time delay. Default=100

                            SLEEP TIMER/PCMCIA

  Type:                  Register

  Format                 AT [cmds] S47=n [cmds]

  Range:                 0-255

  Unit:                  Unidentified

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

                               V.32 RETRAIN

  Type:          Register

  Format         AT [cmds] S42=n [cmds]

  Range:         0-2

  Unit:          Unidentified

  Description:   Controls V.32 retrain. Default=1



                          V.42bis DICTIONARY SIZE

  Type:          Register

  Format         AT [cmds] S57=n [cmds]

  Range:         0-2

  Unit:          Unidentified

  Description:   Sets the maximum V.42bis dictionary size. Default=2

                          V.42 MAXIMUM BLOCK SIZE

  Type:          Register

  Format         AT [cmds] S49=n [cmds]

  Range:         63, 127, 191, 255

  Unit:          Unidentified

  Description:   Sets the maximum block size in V.42 mode. Default=255

                           V.42/MNP/NORMAL MODES

  Type:          Register

  Format         AT [cmds] S53=n [cmds]

  Range:         0-4

  Unit:          Unidentified

  Description:   Controls V.42/MNP/Normal modes. Default=3

