ZOOM TELEPHONICS, INC.

14400BPS FAXMODEM (EXTERNAL)

Card Type                    Fax, Modem (asynchronous)
Chip Set                     Unidentified
Maximum Data Rate            14.4Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     External
Fax Class                    Class I & II
Data Modulation Protocol     Bell 103/212A

                             ITU-T V.21, V.22A/B, V.22bis, V.23, V.32,
                             V.32bis
Fax Modulation Protocol      ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis

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                                CONNECTIONS

         Function           Label             Function             Label

  Line in                        CN1       DC power                 CN4

  Line out                       CN2       Power switch             SW1

  RS-232/422                     CN3

                             DIAGNOSTIC LED(S)

    LED       Color      Status                  Condition

    MSG        Red         On       Used by software applications. Faxes
                                                are waiting

    MSG        Red        Off       Used by software applications. Faxes
                                              are not waiting

    FAX        Red         On          Modem is connected in FAX mode

    FAX        Red        Off        Modem is not connected in FAX mode

   14.4        Red         On       Modem connected at 14.4Kbps (V.32bis,
                                                or FAX mode)

   14.4        Red        Off          Modem not connected at 14.4Kbps
                                           (V.32bis, or FAX mode)

    V32        Red         On       Modem connected at 9600bps or 4800bps
                                                 or faster

    V32        Red        Off         Modem not connected at 9600bps or
                                             4800bps or faster

    V42        Red         On         Error correction (V.42) enabled

    V42        Red        Off         Error correction (V.42) disabled

    DC         Red         On        Data compression (V.42bis or MNP5)
                                                  enabled

    DC         Red        Off        Data compression (V.42bis or MNP5)
                                                  disabled

    EC         Red         On        Error correction enabled using V.42
                                            or MNP4 to send data

    EC         Red        Off            Error correction disabled

    FC         Red         On       Flow control enabled and data buffers
                                                  not full

    FC         Red        Off       Flow control disabled or data buffers
                                                    full

    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

                         Proprietary AT Command Set

               See document V2023 for a full command summary.