Web - Command HAYES-modem.

5m Command HAYES-Modem (C) I. Vyazanichev 
__________________________________________ 1. A general 
description of the commands Hayes'a All teams must start the 
prefix AT (or At, aT, at) and finish . There exist a few 
exceptions, which will, FLS described below. All information 
entered ne-transmits an echo back to the computer (terminal 
signal). Commands can be combined in komandnuyustroku to 
improve clarity komandnuyustroku can enter spaces, dashes, 
etc.: AT DP 8W (0572) 30-49-00, easier to understand than to 
read! ATDP8W0572304900. The command line can contain at most 40 
characters, excluding spaces and pre-fixe AT. If the string is 
longer than 40 characters, the modem returns an ERROR response 
and ignores the command line. Editing erroneous symbols command 
line carried out by pressing . For all entered 
correctly and executed the command modem responds OK. 


        2. The basic instruction set

AT - the beginning (prefix) command line.
A - Manual answer.


   The command switches the modem from the command
regime on the standby signal carrier
calling modem.

   After receiving the carrier signal, the modem
implements a procedure for a positive response
the call and acts as a switched on
procedure for an automatic response.

   If the modem is working on a dedicated communication lines, 
the carrier is responsible, without specifying frequency. In 
this case, if the automatic response (auto-answer) is disabled 
(S0 = 0) and there is a call, to obtain the necessary 
communication pass a command to ATA.


A / - modem repeats the previous command

     line.


   The team submitted without a prefix (AT) and
pressing .

Bn - a choice of communication standards:


   n = 0 CCITT V.21, V.22, V.22 bis,

   n = 1 BELL 103/202A.

Ds - automatic dialing.


   After receiving this command, the modem dials the number on 
the receiving end connection goes into transfer mode.


   The team consists of a phone number,
in the composition of which may include the following
control parameters:

s = P indicates that the digits of the phone

      numbers coming after symbol P Modem

      should dial pulse (using
      form a 0-9).

s = T indicates that the digits of the phone

      numbers coming after symbol T modem

      should raise the frequency (which is allowed

      use the characters 0-9, AD, * and

      and #).

s =, represents a break before dialing

      following figures (2s).

s =; if used as the last character

      at the command line, the modem after

      dialing goes into command

      mode.

s = @ modem waits 5 seconds of silence at

      line if it does not appear in the flow
      SRI 30s (the contents of register S7),

      modem is turned off, and responds NO

      ANSWER.

s =! if the sign! standing in front of signs on
      sequence set, the modem transitions
      goes into a state of ON HOOK (lays

      tube) at 0.5s, and then go over
      children in the state of OFF HOOK (removes

      tube).

s = S modem dials the phone number for
      painted in memory EEROM.

s = R in the record as the last character in

      command line, sets the model
      dem after dialing mode

      "Answer", but just in case

      If the modem call to the modem

      "Originate".

s = W modem waits for a response station (long

      tone) before further set of those
      lefonnogo facilities (eg access to

      automatic long-distance call).

En - Local echo ON / OFF.


   After the command returns the echo E1 modem
each character transmitted to it that lets you know how to 
really work command line.


   n = 0 echo off,

   n = 1 echo enabled.

Hn - control line.

   Command is used primarily for
After telephone:

   n = 0 disable the modem from the line

   n = 1, connect the modem to the line.

In - the production code and control

     Amount:


   n = 0 message soda product

   n = 1 count of checksum prog
          FRAMEWORK contained in the EPROM


   n = 2, the modem checks the status of internal
         an interior memory ROM and returns

         message OK or ERROR.

Ln - setting volume signal integrated
     Nogo speaker (the speaker).


   n = 0 Low

   n = 1 Low

   n = 2 average

   n = 3 high

Mn - Speaker Control (loudspeaker
     field).


   n = 0 Speaker off,

   n = 1 Speaker on only during

         dialing on and off
         the following detect carrier

   n = 2, the speaker turned on all the time

   n = 3 Speaker on after dialing

         last digits on and off
         is obtained after the discovery of bear
         ing corresponding to the modem.

Qn - control the modem's response.


   n = 0 response is included,

   n = 1 the answer is off.


   Regardless of the state of Q0 or Q1 modem
always informs the content of S-registers
product code, checksum, and test results (see the commands S, 
I, and as' T).


O - after the passage of command, the modem Present
    raivaetsya on data transfer mode and

    responsible CONNECT (if before he
    hodilsya in command mode).

Sr - Control S-registers.

Sr? - Reading the contents of the S-Register

    number r.

Sr = nnn - nnn enter a numeric parameter in

    S-register number r.


   All commands modify the contents of one or more of the 
S-registers. Some S-registers contain timing parameters,

which can be changed only team S.

Vn - choose the type of answer modem.


   n = 0 response digital code

   n = 1 the answer in symbolic form by Ang
          liyskom language.


  A standard set of responses modem
__________________________________________

A response value in a symbolic digital
response as a source
__________________________________________

OK 0 Modem executed the command

CONNECT NNN 1 Modem is connected with

                speed NNNbps

RING 2 Modem has found the correct

             Ring Tone.

             The answer given is always,

             regardless of the mode

             work.

NO CARRIER 3 modem lost carrier

             or not received a response

             from the remote modem.

ERROR 4 Error in command

                stroke.Komandnaya row
                ka long 40 symbols
                fishing, or error in the control
                Roll the sum (see

                command L2).

NO DIALTONE 6 No signal

              Switching Station

              (See command X2,

              X4).

BUSY 7 rooms (channel) is busy.

NO ANSWER 8 - The answer is obtained

                If you use a

                command line UPRA
                vlyayuschego @ symbol

                if the condition is not satisfied
                dition - 5s silence (see

                team D).
__________________________________________

Xn - the choice groups answer modem connected

     with the procedure of dialing:


                   X0 X1 X2 X3 X4 message communication 1 2 2 2 
2 Delay (S6 s) Yes yes no yes no no no Waiting for a signal so

no yes Definition signal No No No Yes
yes busy numbers

Message about the connection 1 - indicates that the model
          We shall, after establishing connection

          tell CONNECT, regardless of

          speed.

Post the link 2 - indicates that the model
          We shall, after establishing connection

          provide the following response as a function of
          depending on the speed of work:

          CONNECT 2400, CONNECT 14400, and

          etc. CONNECT response means

          work with a transfer rate

          Data - 300 bps.

Tardiness (S6 s) - indicates that the modem

         of numbers before dialing the telephone
         pa, expects some of

         S-register S6 time.

            In many countries there

         requirement definition signal

         centralized before dialing the phone
         Nogo rates.

Waiting for a signal - indicates that the modem

         will wait for a signal station 5s

         and after this time you
         will give a message NO DIALTONE and ne
         reydet in batch mode.

Determination of the signal - indicates that the model
         We shall in the case of employment vyzy
         under consideration, facilities, displays a message

         BUSY, and return to command

         mode.

Yn - a way to disconnect the modem from the line.


   n = 0, the modem disconnected normally

         (See command 'D),

   n = 1, the modem is turned off after receiving
         of the signal from the line.

Z - reset the modem (the processor reads

    modem configuration from memory NOVRAM).

+ + + - Serial output.


   With this team can go from
transmission mode to command mode
modem connection without interruption. Command requires
silence before and after sending out a sequence. The magnitude 
of this time defined in register S12 (usually 50 =

1s). Decimal value of character ASCII, which is a sign sequence
output register contains the S2 (ie, typically 43
'+').


  3. An extra set of commands Hayes'a

'Cn - function signal DCD.


   n = 0, DCD signal is always active,

   n = 1, DCD signal exists from the moment

         when the modem detect carrier.

'Dn - DTR signal function in the asynchronous

      mode.


   n = 0 Modem ignores DTR,

   n = 1, since the loss of DTR modem transfer
         goes into command mode,


   n = 2, since the loss of DTR modem Zvenigorod's
         raschaet link off function

         "Auto-answer" and goes in to
         mandny mode of operation,


   n = 3, since the loss of DTR modem auto
         automatically executes a command ATZ.

         Modem detects a loss of DTR

         If the DTR signal lasts longer

         time specified in the S-Regis
         triangle S25.

'F - modem reads its configuration for
     painted in EPROM.

'Gn - on / off protection is often
     you.


   n = 0 frequency protection is turned off,

   n = 1, the modem sends the protective rate

         550 Hz,

   n = 2, the modem sends the protective rate

         1800 Hz.

'Ln - kind of communication line.


   n = 0 transfer to the dial-up

         communication


   n = 1 transfer to the permanent lines

         communication.

'Mn - mode of operation.


   n = 0 asynchronous

   n = 1 for terminals that can be pa
         bot as in synchronous and in

         asynchronous mode; coma
         NDU dialing modem sends

         asynchronously, and the transfer of data -

         synchronously

   n = 2, since the advent of the signal DTR,

         modem dials the number of recorded

         team 'Z memory NOVRAM,

   n = 3 for inactive signal DTR of
         exhaust oneself manual dialing.

         After obtaining the compound with

         moment of receiving the DTR signal

         modem connects to the line.

'Pn - setting the pulse rate.


   n = 0 fill factor of the closure
         of / range 39/61%

   n = 1 filling factor of the closure
         of / range 33/67%.

'Rn - managing dependencies RTS / CTS:


   n = 0 CTS signal occurs after the signal
         signal RTS This variant is manifested
         us to during the simulation

         Half-duplex operation.

         These appear to will do
         of the CTS signal is ignored.

   n = 1, the modem ignores RTS, for an asset
         Mr. CTS immediately after connecting

         modem. During an asynchronous transition
         redachi data (the command 'M0) signal
         signal CTS is always active.

'Sn - function signal DSR:


   n = 0 DSR signal is active,

   n = 1 DSR activated after the end
         stage of communication.

'Tn - test your modem.


   n = 0 end of the current test,

   n = 1, the beginning of the local analog loop,

   n = 2 is not used,

   n = 3, the top local digital loop

   n = 4 modem agrees to early digital
         rovoy loop, which passes

         remote modem,

   n = 5, the modem does not provide an external memory device
         Wu consent

   n = 6 Remote Digital Home

         loop

   n = 7, the modem generates a loop RDL, but for
         to generate and transmit testing
         RATE signal

   n = 8 analog loop associated with

         internal test.

'W - modem reads its configuration from the PA
     myati RAM and writes it into memory

     NOVRAM.

'Z - record phone numbers in memory

     NOVRAM, (maximum 33 characters).



         4. Description of the S-registers.


   A description of S-registers used directly when working with 
the modem. For descriptions of individual S-Registers indicated 
two options: 

Range - means the range of parameters

          stored in S-register. Value - the value indicates the 
factory 

          parameter recorded in the S-regi
          tends from the manufacturer.

S0 - Number of ring signals


   Range: 0 - 255

   Bandwidth: 0


   Number of ring signals, which
modem waits before answering the call to the telephone line:


   S0 = 0 autoreply off

   S0> 0 autoreply is enabled

S1 - Counter ring signals (information
     parameter)


   Range: 0 - 255


   The contents of S-register increases
every time the modem receives the signal
call from the telephone line and after
8s after the signal response is reset.

   This case - the only acting purely informational role, its 
contents can be read only. 

S2 - return character


   Range: 0 - 255

   Bandwidth: 043 (ASCII '+')


   Contains a decimal character code ASCII,
which is a sign sequence
return (see'+++').

   In the case where S2> 127 is
blocking the return sequence.

S3 - Symbol 


   Range: 0 - 127

   Bandwidth: 013


   Contains a decimal character code ASCII,
which is a sign .

S4 - Symbol <LF>


   Range: 0 - 127

   Bandwidth: 010


   Contains a decimal character code ASCII,
which is a sign of a new line <LF>.

S5 - Symbol 


   Range: 0 - 32, 127

   Bandwidth: 008


   Contains a decimal character code ASCII,
which is a sign of "slaughtering" (backspase) .

S6 - Timeout statement station


   Range: 2 - 255

   Bandwidth: 2 s

S7 - Waiting for a signal carrier


   Range: 1 - 155

   Bandwidth: 30 s

S8 - The time interval at a set


   Range: 0 - 255

   Bandwidth: 2 s

S9 - Response Time DCD


   Range: 0 - 255

   Bandwidth: 5 (x1/10s = 0,6 s)


   Time delay activation signal DCD
the advent of the carrier.

S10 - Delay in the end after loss

      Carrier


   Range: 1 - 255

   Bandwidth: 14 (x1/10s = 1,4 s)

S11 - not used

S12 - The time required for the sequence of Silence
      sequence return


   Range: 20 - 255

   Bandwidth: 050 (x20ms = 1,0 ms)


   Contents of the register determines 1/50s
the time required to transfer to the silence and
after a sequence of return (see
'+++').

S13 - not used


                  . . .

P.S. Here are the only standard

    team. Modems from different manufacturers

    may have many other teams,

    description of which should be seen in

    documentation for the modem.
__________________________________________