PROMETHEUS PRODUCTS, INC.

PC PROMODEM 144E (REV.1), MAC PROMODEM 144E (REV.1)

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

                             ITU-T V.21, V.22, V.22bis, V.23, V.32,
                             V.32bis, V.34

                             Rockwell V.FC
Error Correction/Compression MNP5, V.42, V.42bis

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                                CONNECTIONS

        Function           Label             Function              Label

  Line out                      CN1      RS-232/422                 CN3

  Line in                       CN2      DC power                   CN4

                             DIAGNOSTIC LED(S)

   LED       Color      Status                   Condition

    MR        Red         On                   Modem is ready

    MR        Red         Off                 Self-test failed

    MR        Red       Blinking           Self-test in progress

    HS        Red         On         Modem is operating at highest speed
                                                 available

    HS        Red         Off        Modem is operating at slower speed
                                                 available

    AA        Red         On                Auto-answer enabled

    AA        Red         Off               Auto-answer disabled

    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

    SD        Red         On             Modem is transmitting data

    SD        Red         Off          Modem is not transmitting data

    RD        Red         On              Modem is receiving data

    RD        Red         Off           Modem is not receiving data

    TR        Red         On                 DTR signal is high

    TR        Red         Off                DTR signal is low

   PWR        Red         On                    Power is on

   PWR        Red         Off                   Power is off

                       MISCELLANEOUS TECHNICAL NOTES
           Note: This modem uses MaxFax software to send and receive
           faxes.

                         Proprietary AT Command Set

               See document V2265 for a full command summary.