3COM CORPORATION

US ROBOTICS 56K VOICE FAXMODEM (MODEL 0026500)

Card Type                          Modem (asynchronous)
Chipset                            U.S. Robotics
I/O Options                        Voice, speakerphone, 25-pin serial port,
                                   power, RJ-45 connector, line in, line
                                   out
Maximum Data Rate                  56Kbps
Maximum Fax Rate                   14.4Kbps
Data Modulation                    Bell 103/212A

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

                                   U.S. Robotics x2
Fax Modulation                     ITU-T V.17, V.21, V.27ter, V.29
Video Modulation                   ITU-T V.80
Error Correction/Compression       MNP5, V.42, V.42bis
Fax Class                          Class I & II
Data Bus                           External

[Image]

                                CONNECTIONS

           Function             Label           Function            Label

  25-pin serial port            CN1     Line out                    CN4

  RJ-45 interface               CN2     Line in                     CN5

  AC power                      CN3     Power button                POWER

                             DIAGNOSTIC LED(S)

    LED          Color          Status                Condition

    PWR       Unidentified        On                 Power is on

    PWR       Unidentified       Off                Power is off

     SD       Unidentified        On         Modem is transmitting data

     SD       Unidentified       Off          Modem is not transmitting
                                                        data

     RD       Unidentified        On           Modem is receiving data

     RD       Unidentified       Off         Modem is not receiving data

    LINK      Unidentified        On         Modem is receiving a signal
                                                    from network

    LINK      Unidentified       Off              Modem is off-line

                      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.