U.S. ROBOTICS, INC.

PASSWORD 300 MODEM

Modem Type             Data (synchronous/asynchronous)
Maximum Data Rate      300bps
Data Bus               External
Data Modulation        Bell 103A/212A
Protocol

[Image]

                                CONNECTIONS

        Purpose           Location            Purpose            Location

  Line in                   CN1       RS-232/422                   CN3

  DC power                  CN2       Power switch                 SW2

    CHARACTER LENGTH

  Setting       J2

  » 10-bit      Off

  11-bit        On

                        TRANSMIT AND RECEIVE SIGNAL

  Setting                            J3                      J4

  » Normal pin assignment     Pins 1 & 2 closed       Pins 1 & 2 closed

  Tx/Rx pins reversed         Pins 2 & 3 closed       Pins 2 & 3 closed

                                AUTO ANSWER

  Setting                                             SW1/1

  » Modem answers on first ring                        Off

  Modem does not answer on first ring                  On

           CARRIER DETECT

  Setting               SW1/2

  » CD normal            Off

  CD forced high         On

              DTR SIGNAL

  Setting                SW1/4

  » DTR normal            Off

  DTR forced high          On

  FACTORY CONFIGURED SETTINGS

     Jumper         Setting

     SW1/3            N/A

       J1             N/A