Modem of modem (Chinese)

xiaoxiao2021-03-06 39

1. Modulate the AT command of the demodulator.

Hayes compatible modem command

Table 1 Modem command

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Regular use of orders

Command description

ATDT audio dial

ATDP pulse dial

ATA answer

ATH hangs

ATZ reset modem

ATX0D is connected by hand-dialing

ATS0 = 0 Turn off automatic response device

ATS0 = 2 Reconstriction after the bell

, (Comma) waiting for 2 seconds

Code Sequence (When you send this command, pause a second, then type , wait adjustment

The acknowledgment is OK). Search from the online state, enter the status, so that you can

The command is sent to the local modem without sending it to other modems.

line end of the line. In addition to A / and , add this character after all commands, if

Number or Wait to press the ENETR button, dialing will terminate.

Modem command

Command description

AT note code; except A / outside it appears before all commands

A answer

A / Repeat the last line of command.

B Set the protocol. When using a high-speed modem, the value of B can be as high as 63, see random

manual.

B, B0 CCITT V.21 / V.22 protocol (1200bps).

B1 Bell 212A protocol (1200bps US domestic); default.

B30 V.22BIS (2400 bps).

B41 V.32 (4800bps)

B52 V.32 (7200bps)

B60 V.32 (9600bps)

B64 V.FC (9600bps)

B75 V.32 BI (14400bps)

B76 V.FC (14400bps)

D Modify dial by the following. Type ATD and one or more of the following commands, plus the phone number

Code 0-9;

P pulse (dial-up with rotating dial-up phone).

R reverse dial.

S = N store phone number 0, 1, 2 or 3; for example: ATDS = 2 and press Enter

T audio.

W Waiting for dialing tone

@ Waiting to be stationary.

Each comma (typically) pause for 2 seconds (there is a register G8 in the delay of each comma).

After the dial is completed to the command state; not waiting for the modem to the modem.

For example, it is used to enter an electronic service network to view your account segment.

Example: Type ATDT456-1414;

Press ENTER to dial, wait for a while, then type ATDT5251; and press ENTER

Delivery frequency code.

! After the flash is hang up, restore (75 milliseconds, then connect). Used in PBX systems

Call transmission.

E controls the recurrence during the command state.

E, E0 did not return.

E1 characters are displayed on your monitor (default).

H telephone hook control.

H, H0 hangs (placed on hooks).

H1 off, but not signal exchange (pick up the phone, but do not try to connect).

I Returns the number and status of the modem.

I, I0 returns the modem identifier.

I1 Execute the ROM check and check and return the value.

I2 Verify the ROM check, return OK or Error.

I3 Report ROM components, including software version numbers.

I4 Report the modem capacity in the software application form.

L Listening to the audio volume (each modem has changed significantly to the low volume).

L, L0 minimum volume, but not closed (see ATM).

L1 low volume.

The volume in L2.

L3 high volume.

M listening to the speaker or off.

M, M0 listening to the horn.

M1 listening to the speaker until detected

M2 listening to the speaker is often open; the carrier signal is detected (default). Monitor the speaker switch during M3 and detect carrier signals, then close (possibly M1 noise

some).

O Returns to the online status (letter OH, not zero).

O, O0. Return to the online status (letters OH or OH zero).

O1 returns to the online status and initializes the subsequent sequence.

Q Allow or suppress results from the modem to the computer (Connect, Ring,

Busy, no carrier, etc. If the result code is sent back, some software will not

jobs.

Q, Q0 Display the result code (default).

Q1 does not display the result code.

Q2 inhibits RING.

S Read the S-Register (see a list of S-registers in Table 4).

Sn sets the current register number to N, here n = 0, 1 ... 95. If no number is specified,

The modem still considers that the register selected last selection.

Sn = V sets the value of the S-register N to V.

The SN? Reads the S-register N and returns the result to the computer, where n = 0, 1 ... 95.

V sent the result code in text or digit.

V, V0 displays the result code in digital.

V1 shows the result code in text. (default)

X Call Process Options (Extended Results, Dial Options).

X, X0 only selects the basic result code. Connect the Connect results code. Do not recognize the number or busy signal.

X1 is the same as the X0 except for all CONNECT results codes.

X2 Wait for dial tone, does not recognize busy signals. Can generate all Connect results codes.

X3 identifies busy signal but not waiting for dialing. Can generate all Connect results codes.

The X4 is waiting for the dial tone before the dialing, and the signal can be identified. Can generate all Connect results code (lack

province).

The Y long interval is separated (determined that the modem is received after receiving a 1.6 second interrupt signal.

No.

Y, Y0 inhibits long interval (default).

Y1 modem After receiving the ATHO command, send a 4 second before hanging up

Broken (interval) signal.

Z hang up; reset.

Z0 reset, the stored user started file 0 from the permanent RAM.

Z1 reset, the stored user starts file 1.

Table 2 is not a command with all modems

Command description

& J jack type (depending on the options for the affiliate).

& J, & J0 RJ11, RJ41S, RF45S jack (no A each A1 line);

& J1 RJ12, RJ13 jack (while connecting the A and A1 lines while the modem picking).

& L Select leased lines or dial lines

& L, & l0 Normal dial lines (default).

& L1 rental lines.

& P Dialing pulse opening ratio

& P, & P0 39% open, 61% (United States and Canada);

& P1 33% open, 67% (United Kingdom and Hong Kong).

& Vn View the current configuration and user start file; n = 0, 1.

& Wn writes the current configuration file 0 or 1 to write the file N to the permanence RAM.

& Y uses the stored starting file when the modem is opened.

& Y, & Y0 uses the starting document 0.

& Y1 Use the starting document 1.

& Z Storage or Call Phone Number.

& Zn = x Store phone number X into the permanent existence memory N (0, 1, 2 or 3) (for example: & z1 = 9,

1-202-456-1414 refers to the storage of the phone number to the storage location).

& Zn = Dial the phone number stored in the memory location 1.

Table 3 Modem MNP, V.42 Error Correction Command

Command description

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/ A Set the largest MNP (Microcom Networking Protocol, Micro-Communication Network Association

Discussion) block size.

/ A0 64 bytes.

/ A1 128 bytes.

/ A2 192 bytes.

/ A3 256 bytes (default).

/ BN sends an interrupt signal of 0 ~ 900 milliseconds, here, n = 0 to 900 milliseconds. The default is n = 3 or

300 ms.

/ C Sets an automatic reliable (error correction) buffer.

/ C0 inhibition (default).

/ C1 up to 200 buffers of 200 data characters. If a reliable is received within 3 seconds

Character, establish a reliable communication. If you receive 200 normal characters (no words

The inquiry is established to establish a normal communication.

/ C2 suppresses automatic reliability buffering. Received a normal change character defined by% a

Connect.

/ G Modem demodulator to the XON / XOFF stream control of the modem.

/ G0 prohibits xon / xoff (default).

/ G1 allows XON / XOFF.

/ J Set the serial BPS rate adjustment.

/ J0 prohibits adjusting the serial BPS rate.

/ J1 allows adjustment of the serial BPS rate.

/ KN setting interrupt control, here, n is equal to 0 ¯ 5; the default is n = 5.

/ N Set operating mode.

/ N0 standard mode.

/ N1 direct mode.

/ N2 forced MNP mode.

/ N3 automatic reliable mode.

/ N4 forced V.42 mode.

/ O For reliable communication (letter OH, not zero).

/ Q Sets the serial port flow control (with the modem changes in the modem).

/ Q0 suppression stream control

/ Q1 two-way XON / XOFF control

/ Q2 single-way RTS / CTS control

/ Q3 two-way RTS / CTS control

/ Q4 is the same as Q1 in addition to the SON / OFF in addition to the modem.

/ Q5 is the same as / Q2, but the modem keeps CTS low until connecting

/ Q6 is low until the CTS is kept in the same way as low until the modem is connected to Q3.

/ S shows the current settings.

/ TN stationary timer (n = 0 ~ 90). By default: n = 0.

/ U Receive reliable communication

/ V Display error control and data compression

/ V0 standard Connect results.

/ V1 Connect code displays usually error control information.

/ V2 Connect code shows complete error control and data compression information

/ X xon / xoff delivery settings

/ X0 does not transfer XON / XOFF to the remote modem

/ X1 Transfer XON / XOFF to Remote Modem

/ Y switches to reliable mode

/ Z Switch to normal mode

% A set automatically reliably operates characters, here, n = 0 = 127; use with / c2.

By default: n = 13. Enter button

% C MNP Level 5 Data Compression Control

% C0 is not allowed

% C1 allows (default)

% E automatic alignment

% E0

% E1 open (default)

-J detection error control

-J, -J0 detection error control detection status

-J1 allows error control detection status

"H v.42bis data compression control

"H0 inhibits V.42BIS data compression control

"H1 can send but not receive V.42BIS data compression

"H2 can receive but do not receive V.42BIS data compression

"H3 allows two-way V.42BIS data compression

"ON Set the maximum V.42BIS string length (n = 6 ~ 250).

Table 4 S-register command

Command default value description

S0 * 00 Modem The number of bells before answering the demodulator. Range: 0 ~ 255.S0 = 0

Automatically respond automatically.

S1 00 bell count. Range: 0 ~ 255 sound

S2 43 Code Character (ASCII Character 0 ~ 127; The default is (plus sign key)). S3 13 Enter the character. (ASCII characters 0 ~ 127; default is Enter.)

S4 10 Wrap characters (ASCII 0 ~ 127).

S5 08 End of the character (ASCII characters 0 ~ 32, 127).

S6 02 Waiting for the time of the dial tone. Range: 0 ~ 255) seconds

S7 30 When dialing, wait for the carrier signal. If this time is not

The carrier signal modem will be detected. Range: 1 to 30 seconds

S8 02 Each comma is suspended. Range: 0 ~ 255

S9 06 Modem Saves a CONNECT command before carrier signal

How long is there, at 1/10 seconds. Range: 1 ~ 255

S10 14 Loss the carrier signal After the modem is waiting for how long it hangs

Take 1/10 seconds. For disturbed telephone lines, mobile phones

Intercontinental calls should be largely set. Range: 0 ~ 255

S11 * 70 The dial speed of each sound (number) is 1/100 seconds.

Range 50 ~ 255.

S12 50 is used in a 1/50 seconds for the exchange rate. Before typing

Waiting time. Range: 0 ~ 255

S16 00 Modem Test Options.

S18 * 00 disclaims the longest time for testing. Range: 0 ~ 255 seconds.

S25 * 05 DTR lost time, at 1/100 seconds. It is short than anything in this time

The west is ignored. Range: 0 ~ 255.

S26 * 01 The RTS to CTS to CTS is delayed at 1/100 seconds.

Range: 0 ~ 255.

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Title: Re: Who knows the MODEM's AT instruction set? Please tell us!

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Standard Directive MODEM Extension Instruction

A sent an Answer Tone

A / re-execute the previous instruction. Secondary instructions do not add preceding code

AT preceding code before each instruction

B b0 = automatic scanning speed, and CCITT low speed

B1 = Automatic scanning speed, and Bell low speed

D Dialing Direction

DS selection allocates four sets of numbers

E E0 = Do not respond bytes

E1 = Respond to input bytes

jumps back instruction mode by data mode

H h h0 = modem Execute on HOOK (General Status)

H1 = modem executes OFF hook (raised phone action)

I i0 = Show product number

I1 = Show checksum

I2 = internal MEMORY test

I3 = Display device ID

I4 = Show Id ID

L L1 = small volume

L2 = in the volume

L3 = big volume

M m0 = speaker mute

M1 = speaker Voice to the connection

M2 = speaker continues

M3 = condition is m1, but the dial is muted

SR? Reads the value of the telecontrol R (r = 0 ~ 28)

SR = n Set the value of the telecontrol R. (R = 0 ~ 28, n = 0 ~ 255)

P pulse dial

T audio dial

Q Q0 = Execute instructions. Response information Q1 = Execute instructions. Do not respond

V0 = in digital form. Response information

V1 = in the form of a text. Response information

X x0 = and Smart Modem 300 are compatible. Connect only Connect

X1 = The connection rate will occur after the connection.

X2 = connection rate will appear after the connection. And monitor Dial Tone.

X3 = connection rate will appear after the connection. And monitor Busy Tone.

X4 = Coincidence rate will occur after the connection. And monitor Dial Tone and Busy Tone.

Y Y0 = Before the disconnection. Do not send a BREAK signal

Y1 = Before the disconnection. Send 4 seconds BREAK signal

Z z0 = reset and reuse the zero parameter table.

Z1 = RESET and reuse the group parameter table.

MODEM extension instruction

& C & C0 = Put the DCD signal. Always identified as high

& C1 = Based on the remote delivery of Carry signals. Actual response

& D & D0 = Modem ignores DTR signals.

& D1 = When the DTR signal changes. MODEM jumps to the instruction mode.

& D2 = When the DTR signal changes. MODEM jumps to the instruction mode. And lane.

& D3 = When the DTR signal changes. MODEM does RESET action.

& F & f = sets the factory setting value of V.42BIS mode. And use RTS / CTS process control.

& G & g0 = Different Guard Tone

& G1 = 550Hz Guard Tone

& G2 = 1800 Hz Guard Tone

& M & m0 = Non-synchronous working mode.

& O & o0 = Close Originate-Only Mode

& O1 = Set Originate-Only Mode

& P & P0 = OFF-HOOK / ON-HOOK ratio is 39/61. (US)

& P1 = OFF-HOOK / ON-HOOK ratio is 33/67. (British, Hong Kong and China)

& S & S0 = DSR signal set to ON.

& S1 = DSR signal, based on the RS-232 specification.

& V Shows MODEM parameter status table

& W & w0 = Store the current parameters used in the parameter table 0.

& W1 = Store the parameters used in the parameter table 1.

& Y & Y0 = When Power ON, take the parameters of parameter table 0

& Y1 = When Power ON, use the parameters of the parameter table 1.

& Z & Zn = set various group phone numbers

% C% C0 = Turn off MNP5, V.42BIS data compression mode

% C1 = Startup MNP5, V.42BIS data compression mode

% D% D0 = Close Clear-Down Signal

% D1 = Turn on Clear-Down Signal

% E% E0 = Close V.22BITO-RETRAIN

% E1 = Open v.22bis auto-retrain

/ A / A0 = MNP block BLOCK capacity. Maximum 64 bytes.

/ A1 = MNP Block capacity. Maximum 128 bytes.

/ A2 = MNP Block capacity. Maximum 192 bytes.

/ A3 = MNP Block capacity. Maximum 512 bytes. % C% C0 = Close MNP Class5 data compression

% C1 = Open MNP Class5 data compression

/ G / g0 = Turn off DCE process control

/ G1 = Turn on DCE process control

/ J / j0 = Close the rate adjustment between serial ports to MODEM

/ J1 = Rate adjustment between serial ports to MODEM

/ N / n0 = can only be coupled in normal mode.

/ N1 = can only be coupled in direct mode.

/ N2 = can only be coupled to MNP mode.

/ N3 = Automatically coupled in ordinary MNP /V.42 mode.

/ N4 = can only be coupled in V.42 mode.

/ Q / q0 = shutdown process control

/ Q1 = Using XON / XOFF process control

/ Q2 = use CTS one-way hardware flow control

/ Q3 = two-way hardware flow control using CTS / RTS

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AT standard instruction

============================================================================================================================================================================================================= ===========

How to use: In the command mode of communication software, enter the front code AT ?? After entering the car, if

The OK will indicate that the instruction is properly executed, such as responding to ERROR, the instruction error is incorrect.

Instruction function

-------------------------------------------------- -----------

AT per instruction preamble

A sent an Answer Tone

A / re-execute the previous instruction, this instruction is uncamored

B B0 automatic scanning speed and ccitt

B1 automatic scanning speed and Bell low speed

B2 automatic scanning speed

B3 can only connect to CCITT V.23

B4 can only connect to CCITT V.21

B5 can only connect in CCITT V.22

B6 can only connect in CCITT V.22BIS

B7 can only connect in CCITT V.32 4800BPS

B8 can only connect in CCITT V.32 9600BPS

B9 can only connect in CCITT V.32BIS

B10 can only connect in CCITT V.34 16800BPS

B11 can only connect in CCITT V.34 19200BPS

B12 can only connect in CCITT V.34 21600BPS

B13 can only connect in CCITT V.34 24000bps

B14 can only connect in CCITT V.34 26400BPS

B15 can only connect in CCITT V.34 28000bps

D Dialing Direction

DSN Selects the N-number number in MODEM memory

E E0 does not respond to the input character E1 E1 respond to the input character

jumps back instruction mode by data mode

H H0 Modem Execution on Hook

H1 MODEM Execute Off Hook

I I0 Display product number

I1 Show checksum

I2 internal reservoir test

I3 Display V.42BIS version

I4 Display product number and chip type

L1 small volume

L2 volume

L3 big volume

M M0 speaker mute

M1 speaker sounds straight to

M2 speaker continues to speak

M3 speaker sounds until the connection, mute when dialing

SR reads the reservoir R value (r = 0-28)

SR = n Set the reservoir R value is n (n = 0-255)

P pulse dial

T double audio dialing

Q Q0 execution instruction response message

Q1 Execute instructions do not respond to messages

V0 responding to messages in digital manner

V1 responds to messages in text

X X0 and Smart Modem300 are compatible, connecting Connect

Link rate after X1

Linking rate after X2 connection, Dial Tone

X3 connection after the connection rate and detect Busy Tone

X4 connection after the connection rate and detect Dial Tone and BUSY TONE

Y Y0 does not send the interrupt signal before the disconnection

The Y1 is disconnected to send 4 seconds interrupt signal

Z Z0 RESET and re-enable the 0th group of parameters

Z1 RESET and re-enable the first group parameters

-------------------------------------------------- ----------------

Note: Although the above instructions are defined by the His AT standard instruction, but the Modem that you use is still

May be incompatible

AT expansion instruction

Instruction function

-------------------------------------------------- -----------

& C & C0 Take DCD signals for high

& C1 actually responded in accordance with the CARRY signal from the far end

& D & D0 MODEM ignores DTR signal

& D1 When DTR signal changes, MODEM jumps to instruction mode

& D2 When DTR signal changes, MODEM jumps to the instruction mode and lashes

& D3 When DTR signal changes, Modem is reset action

& F & f Setting the factory setting value of V.43bis mode and use RTS / CTS process control

& F1 Set the factory setting value of V.43bis mode and use XON / XOFF process control

& F2 Set the factory setting value of V.43bis mode and use RTS / CTS process control

& F3 Set the factory set value of V.43bis mode and use XON / XOFF process control and & d0

action

& F4 Set the factory set value of V.43bis mode and use RTS / CTS process control and & D0

Make

& F5 Set the factory setting value of V.43bis mode, not using process control

& G & g0 No Guard Tone

& G1 550Hz Guard Tone

& G2 1800 Hz Guard Tone

& H command auxiliary instructions

& L & l0 set in a dial mode

& L1 set in a line mode

& L2 is set to boot automatic line

& M & M0 non-synchronous mode of operation

& M1 entering the synchronization mode after non-synchronous dialing

& M2 synchronization mode

& M3 manual synchronous dial mode

& O & o0 Close ORIGINATE-ONLY MODE

& O1 Set Originate-Only Mode

& P & p0 OFF-HOOK / ON-HOOK ratio is 39/61 (US)

& P1 OFF-HOOK / ON-HOOK ratio is 33/67 (British rules. Hong Kong rules)

& R & r0 CTS signal based on RTS signal

& R1 CTS signal set to ON

& S & S0 DSR signal set to ON

& S1 DSR signal based on RS-232 specification

& V Shows MODEM parameter status table

& W & W0 will currently store the parameters in the parameter table 0

& W1 will currently use the parameters in the parameter table 1

& X & X0 Synchronous pulse provides the PIN15 of Modem

& X1 Synchronous pulse is provided by the PIN24 of DTE

& X2 Synchronous pulse is provided by the received signal

& Y0 When Power ON, take the parameters of parameters 0

& Y1 When Power ON, take the parameter table 1 parameters

& Z & Zn Set various group phone numbers

% C% C0 close MNP5, V.42BIS data compression mode

% C1 starts MNP5, V.42BI data compression mode

% D% D0 Close Clear-Down Signal

% D1 launched Clear-Down signal

% E% E0 Close Auto-Retrain

% E1 Start Auto-Retrain

% L% ln setting transmission level is -ndb

% P% P0 Turn off the boot automatic dialing function

% P1 starts boot automatic dialing function

% S% S0 Turn off the backary protection and password detection function

% S1 start password detection function

% S2 starts the callback protection function

/ P / p =? Display password

/ P = n Set the password n = password (maximum 7 bit yuan)

-------------------------------------------------- ------------------

Note: Although the above instructions are defined for the Hebi standard expansion instruction, but the Modem that you use is still

May be incompatible

MNP / V.42 / V.42BIS

Instruction function

-------------------------------------------------- -----------% AU Set the auto-reliable font for n (n = 0-127) must match / c2

% C% C0 close V.42BIS / MNP compression function

% C1 Close V.42BIS / MNP compression function

/ A / A0 sets the maximum MNP Block capacity of 64 words

/ A1 sets the maximum MNP Block capacity of 128 words

/ A2 sets the maximum MNP Block capacity of 192 words

/ A3 sets the maximum MNP Block capacity of 256 words

/ C / c0 When connecting to MNP Mode does not provide buffer or not detecting a Fallback character

/ C1 When connected to Reliable Mode, 200 flming

/ E / E0 When the connection is not responding to Normal Mode

/ E1 When the connection is in Normal Mode response information

/ G / g0 Turn off DCE process control

/ G1 start DCE process control

/ J / J0 Turn off the serial speed adjustment (keep the highest speed between DTE and Modem)

/ J1 starts serial port speed adjustment (with two MODEM speed adjustment)

/ N / N0 can only connect in a normal mode

/ N1 can only connect directly to direct data mode

/ N2 can only connect with MNP mode

/ N3 automatic adjustment MNP or normal mode

/ N4 can only connect with V.42 mode

/ N5 automatic adjustment V.42 or normal mode

/ N6 automatic adjustment V.42 or MNP or normal mode

/ O / o Initialize the Reliable mode (mating / u) in normal connection mode

/ Q / Q0 Turn off DTE process control

/ Q1 settings to process control in XON / XOFF software

/ Q2 settings as the process control in the CTS one-way hardware

/ Q3 settings in the RTS / CTS two-way hardware mode for process control

/ Q4 sets the XON / XOFF unidirectional software mode for process control (MODEM to HOST)

/ U / u In normal connection mode, recognize the Reliable mode (match / o)

/ V / v0 Displays the DCE connection speed but does not display extended mode

/ V1 Displays the DCE connection speed and display an extended mode

/ V2 Displays the DCE connection speed but does not display extended mode

/ V3 Displays the DCE connection speed does not display extended mode

/ X / x0 processed XON / XOFF but not PASS THROUGH

/ X1 Treatment XON / XOFF and Pass THROUGH

/ Y Jump from normal mode to Reliable mode

/ Z End Reliable jumps to normal mode

-------------------------------------------------- ------------------

Note: Although the above instructions are defined for CCITT standards, but the Modem that you use is still

May be incompatible

... The following is another.

AT command set

Command description

Attention code. AT is prefixed to the command, telling the modem being entering a command or command sequence,

It can be used as a prefix except for A / (repetitive) and (exit) commands. Enter separately if the modem is ready to receive commands, only the input AT will make it a determined response.

A / Repeat the previous command. A / Repeat the modem to repeat the previous command, such as redial a phone number

code. The command just implemented will be saved in the command buffer until the AT or turn the power is entered.

Both methods can clear the buffer and make the A / command, because no commands have made modems

repeat. There is no need to enter or AT because they are saved in the command buffer with the previous command.

Region. Parameters: no

A Acknowledgment command. A The modem answers the call without waiting for a ring. Suitable for manual answering calls

Or use it directly in the transmission mode to establish a contact with another modem. Parameters: no

Note: Any commands after the same command line will be ignored.

Note: Some countries may not allow the manual response call (with a command).

BN Communication Standard Options. Decide to use ITU or Bell standard. Parameters: n = 0, 1, 2, 3, 15,

16 (depending on the model of the modem)

n = 0 ITU V.22 rate is 1200 bps; V.21 rate is 300 bps

n = 1 Bell 212 A rate is 1200 bps (default)

N = 2 or 3 modem transmission time uses CCITT V.23 R1200 / T75 ASB;

CCITT V.23 T1200 / R75 is used when the modem receives

N = 15 V.21 rate is 300 bps

n = 16 Bell 103 rate is 300 bps (Compaq Presario 192-VS type and

The default value of the Compaq Presario 288-VS modem)

DN dial command. D Make the modem allocate the number after the command line. Effective dial numbers and dial

The modification program is detailed in the table behind this chapter 3-4: Dial Command Modification Dial Command Modification

in. Parameters: None. Note: In the case of pulse dialing, non-numeric characters are invalid.

EN Command Retriever. When the modem is in command mode, the EN is used to disable or enable input character.

Local back. Parameters: n = 0, 1

n = 0 Disabled Local Back

n = 1 Start local back (default)

HN hang up control options. The HN controls the latency latency. Parameters: n = 0, 1

N = 0 modem hang up (hang up) (default)

n = 1 modem picking

Note: H1 may not be allowed in some countries. In that case, ATH1 will return an error.

Code.

IN requires identification options. Inquire about the product identification code, ROM checksum / or ROM

Calibration status. Parameters: n = 0, 1, 2, 4, 9

n = 0 Returns the firmware version.

n = 1 calculate and display ROM checksum (such as 12AB)

n = 2 Execute the ROM check, calculate and check the checksum, display the determination or error.

n = 4 Returns the software version of the data incentive.

n = 9 return to the country code

Ln speaker volume option. Use LN to control the volume of the speaker during fax and data communication.

Parameters: n = 0, 1, 2, 3

N = 0 speaker low volume

N = 1 speaker low volume

N = 2 speaker in the volume (default)

N = 3 speaker high volume

Note: To completely close the speaker, use the Mo command.

Mn Speaker Control Options. Use MN to control the on / off of the speaker during the fax and data communication.

Parameters: n = 0, 1, 2, 3 (depending on the model of the modem) n = 0 speaker close

n = 1 speaker open until the carrier (default)

n = 2 Modem speakers have been open when short-hook

n = 3 Dial The speaker is opened until the carrier is detected.

NN modulation information exchange. When the local modem is connected to the remote modem, if both communication

Different speeds, you can use the NN to control whether the local modem is executed to perform a negotiation signal exchange.

Parameters: n = 0, 1

N = 0 Send or acknowledge, the exchange is only used by the communication standard specified by the S37 and ATB commands.

N = 1 When sending or answering, the communication standard specified by the S37 and ATB commands is swapped.

The speed of exchange may be reduced (default).

ON online command. ON to force the modem to online.

Parameters: n = 0, 1, 3 (depending on the model of the cleaning system)

n = 0 into online way

n = 1 Enter the online way and initialize the equalizer reforming.

n = 3 enters online and issue a communication rate again before returning online data.

Note: "Exit" to the command mode can be used to return online ways.

P pulse dial. P Set the dial to the pulse, all calls will keep the pulse mode until

Call the audio dial mode (t command). This command can also be used as a dial modification program. (Please refer to this chapter

The table below 3-4: Dial command modifies the program. ) Parameters: no

Note: Some countries may not have a pulse dial, in which case, the P command will be ignored.

Qn results code suppression. Qn allows the modem to send result code. Parameters: n = 0, 1

N = 0 Enable result code (default)

n = 1 Disable return result code (odor noise)

SN selects the S register. Sn points the pointer to a S register, where "N" is the register number. in

Before selecting another register, the n value can be used to read it, and AT = modification can be used.

Parameters: No range: n = 0-29, 31-33, 35, 37, 89

SR = N write S register. SR = n Set the register R to N. These registers are available in this command

change. Parameters: no

Range: r = 0-29, 31-33, 35, 37 and 89 (register number) n = 0-255 (value)

Note: Write reserved registers or read-only registers may cause unpredictable results. Relevant storage

For a complete list of entries, see Chapter 4, S Registers.

SN? Read the S register. SN? Report by n specified register value, N can be any effective S storage

. Parameters: no

Range: n = 0-29, 31-33, 35, 37 and 89

Note: The value is reported in decimal format. To illustrate the bit image register value, convert the ten into the value to

Binary.

T audio dial. T Set the dial mode to audio, all calls will keep the audio method until

Pulse mode (p command). This command can also be used as a dial modification program.

(See the table behind this chapter 3-4: Dial Command Modifying Program.) Parameters: None

VN results code format option. VN determines the type of result code. Parameters: n = 0, 1

n = 0 results code Send (Short Format or Digital) in digital form

n = 1 result code Send (long format [text] or redundant format) in words (default)

XN results code setting / call schedule. XN Select the result code set and dial function. VN command decision

The resulting code is sent in a word or digital form. See the results code definitions in the appendix.

Parameters: n = 0-7 (depending on the model of the modem)

n = 0 Enable Connect Results Code, disable the connection XXXX result code.

Do not detect the occupancy signal and dialing audio.

n = 1 Modem enters the blind dial-by-case state, enabling Connect XXXX results code.

Do not detect the occupancy signal and dialing audio.

n = 2 Modem waiting for dialing audio before dialing, enabling Connect XXXX Results

code. The occupied signal is not detected.

n = 3 Modem Enter the blind dial-up state and enables Connect XXXX result code.

If the occupancy signal is detected, the modem emits a buysiness result code.

n = 4 modem waiting for dialing audio before dialing, enabling Connect XXXX Results

code. If an occupancy signal is detected, the modem emits a buysy result code (default).

Z Reset Command Options. Z Reset the parameters and command sequences of the command and S register to the default value,

Restore factory settings.

exits the code sequence. The character set in the register S2 is transmitted three times in a very fast speed.

The tunator (see S12), the modem is temporarily returned to the command mode. The default value of the exit character is ,

In the documentation, if you specify the , enter the characters in the register S2 in the register S2.

Exit the code sequence Do not start with AT, do not press Enter after delivery.

Note: To return online, use the ATO command.

• S register content. AT? Returns the content of the last S register.

Table 3-2: Advanced Features Order

Command description

& CN data carrier detection options. AT & CN Controls DCD Options. Parameters: n = 0, 1

n = 0 DCD is always open (ON) state; the data carrier state from the remote modem is ignored.

n = 1 DCD is detected when the data carrier is opened (ON); when the data carrier is detected

DCD is closed (OFF) (default).

& DN Data Terminal Ready Options. AT & DN Control DTR option. Parameters: n = 0, 1, 2, 3

n = 0 Modem ignores DTR (default).

n = 1 Modem detects that the DTR is turned to the command mode when the DTR is turned off.

n = 2 Modem Harm, enter the command mode, and detect DTR by turning off

Disable automatic response when you change.

n = 3 Modem Enter the initialization state when the DTR is detected by the Turn-off turnover.

& Mn asynchronous communication method. Parameters: n = 0

n = 0 asynchronous mode

& Qn asynchronous communication method. Parameters: n = 0, 5, 6

n = 0 asynchronous mode

n = 5 Error Control mode (default)

n = 6 asynchronous mode

& TN test command selection. AT & TN Select one of the 8 test commands. Parameters: n = 0, 1

n = 0 terminate any test in progress.

n = 1 Initialize the local simulation loopback (ALB). If you are making a call, you will return a

Error message.

-CN data call audio. Data call sound is an audio with a frequency of 1300 Hz. Its step is 0.5

Second open, 2 seconds close. This audio is specified in ITUV.25 as allowed to determine remote data / fax /

Audio. Parameters: n = 0, 1

n = 0 Disable data call audio (default)

n = 1 Enable data call audio

Note: The default value varies with the country.

Table 3-3: Fax (At F) Command (omitted)

Table 3-4: Dial Command Modification Program Modification Description

L Redial the last number. L Command Modem Rediscount the last number dial in the self-boot.

This should be the first command after ATD; otherwise the modem will ignore the character.

P pulse dial. P Command Modem uses a pulse dial until the audio dial (T) is selected.

The dial / interval ratio of the pulse is selected by & page. Note: Some countries may not have pulse dials.

In that case, the P command will be ignored.

T audio dial. T Command Modem uses audio dialing until the pulse dial (P) is selected,

The continuous and interval time of audio is set by register S11.

W Wait for dialing audio. W pause the modem until the second dialing audio is detected, detected

After dialing the audio, start the phone number immediately. Dial or use certain long distance calls through PBX

This may be quite useful in the case of service. The longest wait time is set in register S7.

; (Semicolon) returns to the command mode. The semicolon (;) mandatory modem is continuously opened after dialing

Keep in the command mode. The semicolon must be placed at the end of the dial command.

@ (In characters) Waiting for the static noise response command. @ 字使调解解下下下下处理

Look for a bell after quotation of quarantine. The S7 register determines the longest wait time. If detected

To the static response, the dial-up modification after this command will be executed. If you detected the occupancy letter

No., the modem returns a buysy result code and enter the hanging process while suspended

Further implementation of the command.

! (Exclamation number) Quickly hang up the picking command. The exclamation number (!) Makes the modem in the hang-up status of 0.5 seconds.

Then return the hook state, some PBX systems use this command to access such as call forwarding and

Special features such as call transfer.

, (Comma) dialthrough during dialing. Comma (,) makes the modem suspend a specified time during dialing period

The duration is set by the register S8.

^ (Denhade) Disables data call audio transmission. This command is only valid for the current call.

0 to 9 dial numbers. Valid numbers of pulse or audio dialing.

A, B, C, D, #, * dial-up characters. Only valid characters for audio dialing. A, B, C and D are double

The audio multi-frequency (DTMF) system is added to the four keys on the 369 # key.

Note: They will be ignored in countries that disable these characters.

Note: Telephone numbers (dial strings) are entered or without spaces or other punctuation symbols. T and P modified commands

You can appear anywhere in the dial string; therefore, if your country allows this feature, the signal is sent

Sending methods may change after passing several numbers.

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