
HAYES MICROCOMPUTER PRODUCTS, INC.

ULTRA SMARTMODEM 14400

Modem Type             Data (synchronous/asynchronous)
Maximum Data Rate      14.4Kbps
Data Bus               External
Data Modulation        Bell 103A/212A
Protocol
                       ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis

[Image]

                                CONNECTIONS

         Purpose           Location            Purpose           Location

  Line in                     CN1       RS-232                     CN4

  Line out                    CN2       Power switch               SW2

  DC power                    CN3

       COMMAND SETS

  Mode          SW1/1

   Enabled       On

  Disabled       Off

  LEASED LINE CARRIER TRANSMIT LEVEL ADJUSTMENT

  Mode                             SW1/2

   Disabled                        On

  Enabled                           Off

                               COMMAND MODE

  Mode                                      SW1/3             SW1/4

           AT command set                    Off               Off

    Asynchronous V.25 command set            Off                On

     Synchronous V.25 command set            On                Off
           w/HDLC framing

     Synchronous V.25 command set            On                 On
         w/character framing

                            MI/MIC

  Mode                       JP1                  JP2

   Disabled           Pins 1 & 2 closed   Pins 1 & 2 closed

  Enabled              Pins 2 & 3 closed   Pins 2 & 3 closed

                             DIAGNOSTIC LED(S)

    LED         Color         Status                 Condition

     HS          Red            On          Modem is operating at 4800bps
                                                     or faster

     HS          Red            Off         Modem is operating at slower
                                                    than 4800bps

     AA          Red            On              Auto-answer enabled

     AA          Red            Off             Auto-answer disabled

     AA          Red         Blinking             Line is ringing

     CD          Red            On               CD signal is high

     CD          Red            Off               CD signal is low

     OH          Red            On               Modem is off-hook

     OH          Red            Off               Modem is on-hook

     RD          Red            On            Modem is receiving data

     RD          Red            Off         Modem is not receiving data

     SD          Red            On           Modem is transmitting data

     SD          Red            Off        Modem is not transmitting data

     TR          Red            On               DTR signal is high

     TR          Red            Off              DTR signal is low

     MR          Red            On                  Power is on

     MR          Red            Off                 Power is off

                         Proprietary AT Command Set

                           COMMAND MODE OPTIONS

  Format              AT [cmds] S94=n [cmds]

  Example:            ATS94=40<CR>

  Default:            0

  Range:              0 - 15

  Unit:               Bit-mapped

  Description:        Sets various options for command set modes.

     Bit       Value                         Function

     1, 0       00      Use AT command set.

               01        Use asynchronous V.25 command set.

               10        Use synchronous V.25 command set with HDLC
                         framing.
               11
                         Use synchronous V.25 command set with character
                         framing.

      2         0       Addressed calling.

               1         Direct access calling.

      3         0       Use ASCII character set.

               1         Use EBCDIC character set.

                   RESTART REQUEST ACKNOWLEDGEMENT TIME

  Type:                Register

  Format:              AT [cmds] S81=n [cmds]

  Example:             ATS81=15<CR>

  Default:             18

  Range:               0-255

  Unit:                10 seconds

  Description:         Sets the time the transmitting modem will wait for
                       acknowledgement of its restart request before it
                       initiates a recovery.

                          RESTART REQUEST MAXIMUM

  Type:          Register

  Format:        AT [cmds] S80=n [cmds]

  Example:       ATS80=8<CR>

  Default:       1

  Range:         0-255

  Unit:          N/A

  Description:   Sets the number of times a restart request can be
                 retransmitted.

                          V.22 PROBE REJECT TIME

  Type:             Register

  Format:           AT [cmds] S97=n [cmds]

  Example:          ATS97=15<CR>

  Default:          30

  Range:            15-70

  Unit:             .1 second

  Description:      Sets the time for which the modem will reject the
                    V.22/V.22bis probe signal when in V.32 mode.

                               V.25 OPTIONS

  Format              AT [cmds] S115=n [cmds]

  Example:            ATS115=40<CR>

  Default:            0

  Range:              0 - 3

  Unit:               Bit-mapped

  Description:        Sets V.25 data mode and V.25 auto-answer mode.

     Bit       Value                        Function

      0         0      Answer after two rings

               1        Answer after number of rings set in S0.

      1         0      Select 7 data bits, even parity, and one stop
                        bit.
               1
                        Select 8 data bits, no parity, and one stop bit.

                      Proprietary V.25bis Command Set

                          RESET TO AT COMMAND SET

  Type:          Immediate

  Format:        RST

  Example:       RST<CR>

  Description:   Executes a cold reset and returns to AT command set.

