modem at 14400

Good people! Tell me, plz, can the subject work according to the Kondratiev scheme
without buffering, and what needs to be done for this?

But at 9600 it works, but at 14400 it doesn’t want to :(((
The signs are: at a speed of 14400 the momed does not respond to commands at all, and if
the speed is increased to 19200, then various glitches appear in the form of errors and/or
missing characters, it connects to 14400, but reception occurs with errors.

(USRobotics 'GateWay 2000 TelePhath' 14400 modem)

That's all for me for now!

Sincerely, Roman (aka
TimeX).

The signs are as follows: at a speed of 14400 the momed does not respond to commands at all, and if
the speed is increased to 19200, then various glitches appear in the form of errors and/or
missing characters, while it connects at 14400, but reception occurs with errors.

(USRobotics 'GateWay 2000 TelePhath' modem 14400)

I have everything. Bye!

Sincerely, Roman (aka
TimeX).

16 Mar 01 22:49, Roman Timofeev wrote to All:

RT> Good people! Tell me, plz, can the subject work according to the Kondratieff
RT> scheme without buffering, and what needs to be done for this?

What does it mean with buffering?

RT> But at 9600 it works, but at 14400 it doesn’t want to :(((
RT> The signs are: at a speed of 14400 the momed does not respond to commands at all,
RT> and if increase the speed to 19200, then various glitches appear in the form of
RT> errors and/or missing characters, while connecting to 14400, but receiving
RT> comes with errors.

On 2400 without errors, then configure the modem.

˜ ◊œ”À“≈”≈Œÿ≈, 18 Õ¡“‘¡ 2001 «. Kirill Frolov … Roman Timofeev œ¬”’÷ƒ¡Ã…
"Õœƒ≈Õ Œ¡ 14400". “œƒœÃ÷¡≈Õ “¡⁄«œ◊œ“...

RT>> Ï¿ƒ… ƒœ¬“Ÿ≈! –œƒ”À¡÷…‘≈, plz, Õœ÷≈‘ Ã… ”¡¬÷ “¡¬œ‘¡‘ÿ –œ ÀœŒƒ“¡‘ÿ≈◊”Àœ 
RT>> ”»≈Õ≈ ¬≈⁄ ¬’∆≈“…⁄…“œ◊¡Œ…—, … fi‘œ ƒÃ— ‹‘œ«œ Œ’÷Œœ ”ƒ≈á‘ÿ?

KF> · fi‘œ ⁄Œ¡fi…‘ ” ¬’∆≈“…⁄…“œ◊¡Œ…≈Õ?

H’... ‹‘œ Àœ«ƒ¡ ◊”≈ ”…«Œ¡ÃŸ, …ƒ’›…≈ Œ¡ ÕœÕ≈ƒ ”œ ”»≈ÕŸ, …Ã… –œƒ–…“¡¿‘”— À +5 ˜,
…/…Ã… ¬≈∆≈“…⁄…“’¿‘”— (d0-d7):

˜œ‘ œŒœ:
(Œ≈ –œÕŒ¿ œ‘À’ƒ¡ ”»≈ÕÀ¡...)
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------------------------

RT>> · ‘œ ◊œ‘ Œ¡ 9600 - ‘—Œ≈‘, ¡ Œ¡ 14400 - Œ≈ »œfi≈‘ :(((
RT>> “…⁄Œ¡À… ‘¡À…≈: Œ¡ ”Àœ“œ”‘… 14400 ÕœÕ≈ƒ ◊œœ¬›≈ Œ≈ œ‘◊≈fi¡≈‘ Œ¡ ÀœÕ¡ŒƒŸ,
RT>> ¡ ≈”Ã… ”Àœ“œ”‘ÿ –œ◊Ÿ”…‘ÿ ƒœ 19200, ‘œ ◊ŸÃ≈⁄¡¿‘ “¡⁄ŒŸ≈ «Ã¿À… ◊ ◊…ƒ≈
RT>> œ€…¬œÀ …/…Ã… –“œ–’”À¡ ⁄Œ¡Àœ◊, ÀœŒŒ≈À‘…‘”— –“… ‹‘œÕ Œ¡ 14400, Œœ –“…£Õ
RT>> …ƒ£‘ ” œ€…¬À¡Õ….

KF> H¡ 2400 ¬≈⁄ œ€…¬œÀ? Ӂ ƒ¡ ‘œ Œ¡”‘“¡…◊¡  Õœƒ≈Õ.

ı«’... · fi£ ◊ Œ£Õ Œ¡”‘“¡…◊¡‘ÿ-‘œ? ΡÀ…Õ… …Õ≈ŒŒœ ÀœÕ¡Œƒ¡Õ…?

ı Õ≈Œ— - ◊”£. œÀ¡!

Û ’◊¡÷≈Œ…≈Õ, ڜաŒ (aka
TimeX).

Sat 17 March 2001 02:54, Roman Timofeev wrote to All:

RT> Good people! Tell me, plz, can the subject work according to the Kondratiev
RT> scheme
RT> without buffering, and what needs to be done for this?
RT> But at 9600 it works, but at 14400 it doesn’t want to :(((
RT> The signs are: at a speed of 14400 the momed does not respond to commands at all, and
RT> if the speed is increased to 19200, then various glitches appear in the form of
RT> errors and/or missing characters, it connects at 14400, but the reception comes with
RT> errors.

Mania also has USR 14400. When the port is locked at 14400, it also does not
react to commands, but at 19200 everything is OK, I didn’t do any buffering, everything worked. and
so. The speed is stable 1200 cps, sometimes 1300...1400.

Regards, Sergey Boyko.

RT>>> Kondratiev circuit without buffering, and what needs to be done
RT>>> for this?
KF>> And what does it mean with buffering?

RT> Well... this is when all the signals going to the motherboard from the circuit are either supported
RT> to +5 V, and/or buffered (d0-d7):

Nonsense...

RT> ───MODEM─┐
RT> │
RT> A28-A22╞══resistors:3-10k══+5v
RT> │
RT> A21├─┤
RT> A11├──┤
RT> ─────────┘

THROW OUT THE RESISTORS, EVERYTHING! You can also throw out AP6, it is not necessarily needed, but in /some/
cases it helps. Addresses should not be passed through all sorts of LL1, but just
through AP5,6.
Make the wires to the modem as short as possible.

KF>> On 2400 without errors? If so, then configure the modem.
RT> Uh-huh... What should I configure in it? Which commands exactly?

Read the documentation for the modem.

RT>>>> Good people! Tell me, plz, can the subject work according to the
RT>>>> Kondratiev scheme without buffering, and what needs to be done
RT>>>> for this?

...
SB> Mania also has USR 14400. When the port is locked at 14400,
SB> also does not respond to commands, but at 19200 everything is OK. I didn’t do any buffering, everything worked
SB> and so on. The speed is consistently 1200 cps, sometimes 1300...1400.

For some modems, speeds of 14400, 16800, etc. are considered non-standard;
they cannot determine these speeds. That's why they hang.
I have the same situation - USR 33600 does not understand the speed of lock 14400. And before
there was
UMC 14400 - he understood.

With the best, Sergey!

... I will buy a cerebral cortex prosthesis with firmware against hangover.

RT> That's the whole point: it doesn't exist. But still thanx.

Here, catch it! Alexey Volyk once posted it to me.

DESCRIPTION OF HAYES-MODEM COMMANDS

1.1 General description of Hayes commands

All commands must begin with the prefix AT (or At, aT, at) and
end with . There are a few exceptions, which will be described below. All data entered is echoed back to the computer (terminal). The modem automatically adjusts its baud rate and character format to the terminal parameters.

To change the baud rate, you need to define it in the command line on the terminal. The modem agrees to the entered change and responds OK. Commands can be combined into a command line, to improve clarity, spaces, dashes, etc. can be entered into the command line: AT DP 8W (044)
430-49-00, easier to read and understand than ATDP8W0444304900.

The command line can contain no more than 40 characters, excluding spaces and AT prefix. If the line is longer than 40
characters, the modem returns an ERROR response and ignores the command
line. Editing erroneous command line characters is carried out using the key. The modem responds OK to all correctly entered and executed commands. The modem can
be configured to transmitresponse in the form of a digital code (convenient
for software maintenance of the modem). Each response is a one- or two-digit code.

After switching on, the modem (as a rule) is configured to transmit
the response in symbolic form.

1.2 Basic set of commands

AT - the beginning (prefix) of the command line
After receiving this command, the modem automatically
adjusts the transmission speed and character format to the parameters of the terminal.

A - manual response;
The command switches the modem from command mode to
modem waiting mode for the carrier signal of the calling modem.
After receiving the carrier signal, the modem implements
a positive answer to the call procedure and acts as
switched to the automatic answer procedure.
If the modem operates on leased lines, then
answers the carrier without specifying the frequency. In this case, if the automatic answer (auto-answer) is turned off (S0= 0) and
a call is in progress, then to receive communication you must send
the ATA command.

A/ - the modem repeats the previous command line;
The command is given without the prefix (AT) and pressing .

Bn - selection of the communication standard:
n = 0 CCITT V.21, V.22, V.22 bis,
n = 1 BELL 103/202A.

Ds - automaticdialing a number.
After receiving this command, the modem begins dialing
the number and, upon receiving communication, switches to transmit
mode.
The command consists of a telephone number, which may include the following control parameters:

s = P means that the digits of the telephone number
coming after the P symbol must be dialed
pulsed by the modem (characters 0-9 are used).
s = T indicates that the digits of the telephone number
coming after the symbol T must be dialed by the modem
frequency (characters
0-9, A-D, * and # are allowed).
s = , indicates a break before dialing the next
digit (2s).
s = ; if used as the last character in the command line, then after dialing the number
the modem goes into command mode.
s = @ the modem waits for 5 seconds of silence on the line,
if it does not appear within 30s (the contents of the S7 register), the modem turns off and
responds NO ANSWER.
s = ! if sign ! stands before the characters of the dialing sequence, the modem goes into the ON HOOK state (hangs up) on0.5s, and then
will again go into the OFF HOOK state (pick up
the handset).
s = S the modem dials the telephone number recorded
in the EEROM memory.
s = R when written as the last character in the command
line, sets the modem after dialing the number to the "answer" mode, but only if the modem calls to the modem "originate".
s = W the modem waits for a response from the station (long beep)
before further dialing the telephone number
(for example, access to automatic long-distance communication).

En - local echo ON/OFF;
After the E1 command, the modem returns an echo of each character
transmitted to it, which allows you to find out how the command line really works.
Command E0 blocks this function.
n = 0 echo disabled,
n = 1 echo enabled

Hn - line control;
The command is used primarily when terminating telephone communication:
n = 0 disconnecting the modem from the line,
n = 1 connecting the modem to the line.

In - production code and checksum:
n = 0 product code message,
n = 1 counting controlthe amount of the program contained in ROM (EPROM),
n = 2 the modem checks the state of the internal memory
ROM and returns an OK or ERROR message.

Ln - setting the volume of the signal of the built-in speaker (loudspeaker);
n = 0.1 low
n = 2 medium
n = 3 high

Mn - control of the speaker (loudspeaker);
n = 0 speaker is off,
n = 1 speaker is on only during dialing
and turns off after detecting carrier,
n = 2 speaker is on all the time,
n = 3 speaker is on after dialing the last digit of the number and turns off after detecting carrier
of the answering modem.

Qn - modem response control;
n = 0 response on,
n = 1 response off.
Regardless of the state of Q0 or Q1, the modem always reports the contents of the S-registers, product code, check
sum and test results (see commands S, I, as well as
&T).

O - after passing the command, the modem is configured to
data transmission mode and responds CONNECT (if before it
was in command mode work);

Sr - control of S-registers;

Sr? - reading the contents of the S-registernumber r;

Sr=nnn - input of the numeric parameter nnn into the S-register number r.
All commands modify the contents of one or more
S-registers. Some S-registers contain temporary
parameters that can only be changed with the S command;

Vn - select the modem response type;
n = 0 response in digital code,
n = 1 response in symbolic form in English.

Standard set of modem responses

Response Response Value
in symbolic digital response
code form
--------------------------------------------------------------------------

OK 0 The modem executed the command

CONNECT 1 The modem is connected at a speed of
300bps after the X0 command, it is possible to operate at a speed of
600, 1200, 2400 bps.

RING 2 The modem has detected a valid
ringing signal. A response is always issued, regardless of
the operating mode.

NO CARRIER 3 The modem lost the carrier or did not
receive a response from the remote
modem.

ERROR 4 Error incommand line.
The command line is longer than 40
characters, or there is an error in the checksum (see L2).

CONNECT 1200 5 The modem is connected at a speed of
1200 bps, (see X1,X2,X3,X4).

NO DIALTONE 6 No signal from the switching station
(see X2,X4).

BUSY 7 The number (channel) is busy.

NO ANSWER 8 The response is obtained if
the control character
@ is used in the command line and if the condition -
5s of silence (see D) is not met.

CONNECT 600 9 The modem is connected at a speed
600 bps, (see X1,X2,X3,X4).

CONNECT 2400 10 The modem is connected at a speed of
2400 bps, (see X1,X2,X3,X4).
------------------------------------------------------------

Xn - selection of modem response groups associated with the dialing procedure
numbers:

X0 X1 X2 X3 X4
Communication message 1 2 2 2 2
Late (S6 s) yes yes noyes no
Waiting for a switch signal no no yes no yes
Detection of the number's
busy signal no no no yes yes

Communication message 1 - means that the modem will report CONNECT after the connection is established, regardless of the operating speed.

Communication message 2 - means that the modem after the connection is established
will report the following response depending on the speed of operation:
CONNECT, CONNECT 600, CONNECT 1200,
CONNECT 2400.
The CONNECT response indicates operation with
data transfer speed - 300 bps

Delay (S6 s) - means that the modem is waiting before dialing
the telephone number time defined in the S-register S6. In
many countries there is a requirement to
determine the signal of the control panel
before dialing a telephone number.

Waiting for signal - means that the modem will wait
the switch for a signal from station 5s and after
this time will display the message NO
DIALTONE and switches to the command
operating mode.

Signal definition - means that the modem, if the called number is busy, will issue
the BUSY message and return to the command
operating mode.

Yn - a method for disconnecting the modem from the line.
There are two ways to disconnect the modem from the line:
- normal, when the modem receives an inactive DTR signal,
- when the modem receives a break signal from the remote modem.
The ATH0 command sends a break signal, which
lasts 4 s.
n = 0 the modem turns off normally (see command
&D),
n = 1 the modem turns off after receiving a signal from
line.

Z - modem reset (the processor reads the modem
configuration from NOVRAM).

+++ - exit sequence.
Thanks to this command, you can switch from the transmission mode to the command mode of the modem without interrupting communication. The command requires silence before and after the direction
of the exit sequence. The value of this time is defined in register S12 (usually 50 = 1s). The decimal value of the ASCII character,which is the sign of the output sequence contains register S2 (usually 43, i.e.
"+").

1.3 Additional set of commands.

&Cn - function of the DCD signal.
n = 0 the DCD signal is always active,
n = 1 the DCD signal exists from the moment when the modem
detects the carrier.

&Dn - function of the DTR signal in asynchronous operating mode.
n = 0 the modem ignores DTR,
n = 1 from the moment of loss of DTR the modem switches to command-
operating mode,
n = 2 from the moment of loss of DTR the modem stops communication,
turns off the "auto-answer" function and goes into
command operating mode,
n = 3 from the moment of loss of DTR the modem automatically implements the ATZ command. The modem detects loss of
DTR if the DTR signal lasts longer than the time
defined in the S-register S25.

&F - the modem reads its configuration written in the EPROM.

&Gn - turns on / off the protective frequency.
n = 0 the protective frequency is disabled,
n = 1 the modem sends a protective frequency of 550 Hz,
n = 2 the modem sends protective frequency 1800 Hz.

&Ln - type of communication line.
n = 0 transmission on switched linescommunications,
n = 1 transmission on permanent communication lines.

&Mn - operating mode.
n = 0 asynchronous,
n = 1 for terminals that can operate in both
synchronous and asynchronous operating modes; The modem transmits the dialing command
asynchronously, and the data transmission is synchronous,
n = 2 from the moment the DTR signal appears, the modem dials the number recorded by the &Z command in memory
NOVRAM,
n = 3 when the DTR signal is inactive, the number is dialed manually
.
After receiving the connection, from the moment the DTR signal arrives, the modem is connected to the line.

&Pn - setting the pulse coefficient.
n = 0 duty cycle short circuit / interval
39/61%,
n = 1 duty cycle short circuit / interval
33/67%.

&Rn - control of RTS/CTS dependencies:
n = 0 the CTS signal comes after the RTS signal. This
option appears during simulation
of a half-duplex operating mode. Data appearing before the CTS signal is received is ignored.
n =1 modem ignores RTS, with active CTS immediately
after connecting the modem. During asynchronous data transfer (command &M0), the CTS
signal is always active.

&Sn - functions of the DSR signal:
n = 0 the DSR signal is active,
n = 1 DSR is activated after the end of the connection establishment phase.

&Tn - modem tests.
n = 0 end of the current test,
n = 1 start of the local analog loop,
n = 2 not used,
n = 3 start of local digital loop,
n = 4 modem agrees to start digital loop,
which is transmitted by remote modem,
n = 5 modem does not give consent to external device,
n = 6 start of remote digital loop,
n = 7 modem generates RDL loop, and then generates
and transmits a testing signal,
n = 8 analog loop connected to the internal test
volume.

&W - the modem reads its configuration from RAM memory and writes
it to NOVRAM memory. Access to S-registers in memory
NOVRAM.

&X - selection of reference time for transmission.
n = 0 modem generates time base - timer signal 114 (15th pin),
n = 1 modem receives the time base for transmission from
the computer: timer signal 113 (14th piece-
rivers),
n = 2 modem receives the time base for transmission from
the line, from the carrier.

&Z - recording the telephone number in the NOVRAM memory,
(maximum 33 characters).

2.0 Description of S-registers.

A description of the S-registers is given directly used
when working with the modem.

To describe individual S-registers, two parameters are indicated:
- range - denotes the range of parameters stored in the S-register.
- value - denotes the factory value of the parameter,
described in the S-register by the manufacturer.

S0 - Number of ring tones
Range: 0 - 255
Value: 000
Number of ring tones that the modem waits for before answering a telephone line call:
S0 = 0 auto-answer disabled
S0 > 0 auto-answer enabled

S1 - Ring tones counter (information parameter)
Range: 0 - 255
Value: -------
The contents of the S-register is incremented each time the modem
receives a ringing signal from the telephone line line and after 8s
after the response signal is reset.
This register is the only one that performs purelyinformational role, its contents can only be read.

S2 - Return character
Range: 0 - 255
Value: 043 (ACSII "+")
Contains the decimal code of the ASCII character, which is the
return character/see "+++"/.
In the case where S2 > 127 a blocking occurs return sequence.

S3 - Character
Range: 0 - 127
Value: 013 (ASCII "" or Ctrl-M (^M))
Contains the decimal code of the ASCII character, which is the
character .

S4 - Character
Range: 0 - 127
Value: 010 (ASCII "" or Ctrl-J (^J))
Contains the decimal code of the ASCII character that is
newline .

S5 - Character
Range: 0 - 32, 127
Value: (ASCII "" or Ctrl-H (^H))
Contains the decimal code ASCII character which is
the backspase .

S6 - Station Announcement Wait Time
Range: 2 - 255
Value: 002 s

S7 - Carrier Signal Wait
Range: 1 - 155
Value: 030 s

S8 - Dial Interval Time
Range: 0 - 255
Value: 002 s

S9 - DCD response time
Range: 0 -255
Value: 005 (x1/10s = 0.6s)
Delay time for activation of the DCD signal due to the presence of
carrier.

S10 - Release delay after loss of carrier
Range: 1 - 255
Value: 014 (x1/10s = 1.4s)

S11 - Not used

S12 - Required silence time for return sequence
Range: 20 - 255
Value: 050 (x 20ms = 1.0ms)
The contents of the register determine in 1/50s the time of required
silence in transmission before and after the return sequence
(see '+++').

S13 - Not used

For SIMM everything... Beep!
Nikolay G. Arhipoff >