TELEBIT CORPORATION

TRAILBLAZER PLUS/T2000

Card Type                    Modem (synchronous/asynchronous)
Processor                    Motorola 68000
Processor Speed              Unidentified
Chipset                      Unidentified
Maximum Data Rate            18Kbps
Data Bus                     Serial
Data Modulation              Bell 103A/212A

                             ITU-T V.22, V.22bis

                             Telebit PEP
Error Correction/Compression MNP3

[Image]

                                CONNECTIONS

        Function          Label              Function              Label

  DC power                    CN1      Talk/Data switch             SW1

  RS-232/422                  CN2      Configuration A/B switch     SW2

  Line in                     CN3      Power switch                 SW3

  Line out                    CN4

            Note: The exact locations of SW1 and SW2 are unidentified

                        USER CONFIGURABLE SETTINGS

                  Setting                     Label          Position

  1MB ROMs installed                            E1          Pins 1 & 2
                                                              closed

  512KB ROMs installed                          E1          Pins 2 & 3
                                                              closed

            Note: When installing 512KB ROMs, the chips should be
            installed in the holes of the sockets furthest from the CPU.

                             DIAGNOSTIC LED(S)

    LED           Color           Status               Condition

    FST       Unidentified          On        Modem is using PEP protocol

    FST       Unidentified          Off          Modem is not using PEP
                                                       protocol

    SLW       Unidentified          On          Modem is using Bell 103,
                                               Bell 212, V.22, or V.22bis
                                                       protocol

    SLW       Unidentified          Off         Modem is not using Bell
                                                103, Bell 212, V.22, or
                                                   V.22bis protocol

    OH        Unidentified          On             Modem is off-hook

    OH        Unidentified          Off            Modem is on-hook

    RD        Unidentified          On          Modem is receiving data

    RD        Unidentified          Off       Modem is not receiving data

    SD        Unidentified          On        Modem is transmitting data

    SD        Unidentified          Off        Modem is not transmitting
                                                         data

    CTS       Unidentified          On            CTS signal is high

    CTS       Unidentified          Off            CTS signal is low

    DTR       Unidentified          On            DTR signal is high

    DTR       Unidentified          Off            DTR signal is low

    MR        Unidentified          On                Power is on

    MR        Unidentified          Off              Power is off

                         Proprietary AT Command Set

                      The command set is unidentified.