HAYES MICROCOMPUTER PRODUCTS, INC.

OPTIMA 144B + FAX144

Modem Type                   Data (synchronous/asynchronous)/Fax
Maximum Data Rate            14.4Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     External
Fax Class                    Class I & II
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.21, V.22, V.22bis, V.32, V.32bis
Fax Modulation Protocol      V.17, V.27ter, V.29
Error Correction/Compression MNP2-5, V.42, V.42bis

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                                CONNECTIONS

         Purpose           Location            Purpose           Location

  Line in                     CN1       Line out                   CN2

   BASE I/O ADDRESS SELECTION

  Address    SW1/1      SW1/2

   COM1:       On        On

   COM2:       On        Off

   COM3:      Off        On

   COM4:      Off        Off

                           HAYES ESP™ MODE

             Mode                      SW1/3                 SW1/4

        16450 UART mode                  On                   On

        16550 UART mode                  On                   Off

    16550 UART with hardware            Off                   On
         flow control

           Disabled                     Off                   Off

                  BASE I/O ADDRESS SELECTION

       Address               JP1                  JP2

        180h           Pins 2 & 3 closed   Pins 2 & 3 closed

        188h           Pins 2 & 3 closed   Pins 1 & 2 closed

        250h           Pins 1 & 2 closed   Pins 2 & 3 closed

        258h           Pins 1 & 2 closed   Pins 1 & 2 closed