3COM CORPORATION

AUTO DIAL S-100

Card Type                Modem (asynchronous)
Chip Set                 U.S. Robotics
Maximum Data Rate        1200bps
Data Bus                 External
Data Modulation Protocol Bell 103/212A

                                                                      54168

                                CONNECTIONS

         Function           Label             Function             Label

  Line out                       CN1       DC power                 CN4

  Line in                        CN2       Power switch             SW1

  RS-232/422                     CN3

                        USER CONFIGURABLE SETTINGS

                    Setting                        Label      Position

  Factory configured                                J1       Unidentified

  10-bit character transmission                     J2       Unidentified

  11-bit character transmission                     J2       Unidentified

  Equalize for dial-up phone lines                  J5       Unidentified

  Equalize for dedicated phone lines                J5       Unidentified

                             ADDRESS SELECTION

    Setting        S6/A        S6/B        S6/C        S6/D         J6

     00/01         Off         Off         Off         Off         Off

     0E/0F         Off         Off         Off         Off          On

     10/11         Off         Off         Off          On         Off

     1E/1F         Off         Off         Off          On          On

     20/21         Off         Off          On         Off         Off

     2E/2F         Off         Off          On         Off          On

     30/31         Off         Off          On          On         Off

     3E/3F         Off         Off          On          On          On

     40/41         Off          On         Off         Off         Off

     4E/4F         Off          On         Off         Off          On

     50/51         Off          On         Off          On         Off

     5E/5F         Off          On         Off          On          On

     60/61         Off          On          On         Off         Off

     6E/6F         Off          On          On         Off          On

     70/71         Off          On          On          On         Off

     7E/7F         Off          On          On          On          On

     80/81          On         Off         Off         Off         Off

     8E/8F          On         Off         Off         Off          On

     90/91          On         Off         Off          On         Off

     9E/9F          On         Off         Off          On          On

     A0/A1          On         Off          On         Off         Off

     AE/AF          On         Off          On         Off          On

     B0/B1          On         Off          On          On         Off

     BE/BF          On         Off          On          On          On

     C0/C1          On          On         Off         Off         Off

     CE/CF          On          On         Off         Off          On

     D0/D1          On          On         Off          On         Off

     DE/DF          On          On         Off          On          On

     E0/E1          On          On          On         Off         Off

     EE/EF          On          On          On         Off          On

     F0/F1          On          On          On          On         Off

     FE/FF          On          On          On          On          On

            Note: J6 ‘Off’ position in table corresponds to ‘Up’ position
            on board. J6 ‘On’ position corresponds to ‘Down’ position.

  MISCELLANEOUS TECHNICAL NOTES

  Note: Diagram not available.

                         Proprietary AT Command Set

               See document V2252 for a full command summary.