3COM CORPORATION

SPORTSTER 56K FAXMODEM (EXTERNAL)

Card Type                    Modem (asynchronous)
Chipset                      U.S. Robotics
Maximum Data Rate            56Kbps
Maximum Fax Rate             14.4Kbps
Data Modulation              Bell 103A/212A

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

                             U.S. Robotics x2
Fax Modulation               ITU-T V.17, V.21CH2, V.27ter, V.29
Error Correction/Compression MNP5, V.42, V.42bis
Fax Class                    Class I & II
Data Bus                     Serial

[Image]

                                CONNECTIONS

          Function            Label            Function             Label

  DC power in                  CN1     Telephone line in            CN3

  Serial port                  CN2     Telephone line out           CN4

                          DIAGNOSTIC LED(S)

    LED        Color      Status               Condition

     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

     SD         Red      Blinking      Modem is transmitting data

     SD         Red         Off      Modem is not transmitting data

     RD         Red      Blinking       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

                         DIAGNOSTIC LED(S) (CON'T)

      LED         Color         Status                Condition

      CS           Red            On             CTS signal is high

      CS           Red           Off              CTS signal is low

    ARQ/FAX        Red            On         Modem is connected in error
                                                   correction mode

    ARQ/FAX        Red           Off          Modem is not connected in
                                                error correction mode

    ARQ/FAX        Red         Blinking       Modem is connected in FAX
                                                   mode or modem is
                                              retransmitting data due to
                                                       errors

                      SUPPORTED STANDARD COMMANDS

                           Basic AT Commands

  +++, ‘comma’, A/

  A, B, D, E, F, H, L, M, O, P, T, V, X, Z

  &C, &D, &F, &G, &P, &R, &S, &T, &W

                              S-Registers

  S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S38

            Note: See MHI help file for complete information.

                         Proprietary AT Command Set

   See U.S. ROBOTICS SPORTSTER 56K FAXMODEM (INTERNAL) for a full command
                                  summary.