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- ============= 2400B HAYES MODEM COMMANDS LIST =============
-
-
-
- Here is a list of the S-registers used by Hayes modem. Please be aware
- that not all modems support these registers and that some modems may
- have more registers than are listed.
-
- All S register commands are entered in the "AT" commend line.
-
- Example: AT S8=2 S2=43 S7=30
-
- To read the value in any register, use
-
- AT SX? <CR>
-
- The modem should echo the value found in the regester x.
-
-
- REG Values Register function
-
- S0 0 AUTO ANSWER OFF
- 1-255 AUTO ANSWER ON, ANSWER ON INDICATED # OF RINGS
- S1 **0-255 RING COUNT (THIS IS A READ-ONLY REGISTER)
- S2 0-127 ESCAPE CHARACTER NORMALLY SET TO 43 OR "+"
- 127-255 ESCAPE FUNCTION DISABLED
- S3 0-127 END OF LINE CHARACTER NORMALLY SET TO 13 (CR)
- S4 0-127 LINE FEED CHARACTER NORMALLY SET TO 10 (LF)
- S5 0-127 BACKSPACE CHARACTER NORMALLY SET TO 8 (BS)
- S6 2-255 SEC PAUSE BEFORE DIALING (NORMALLY 2 SEC)
- S7 1-255 SEC WAIT FOR CARRIER (NORMALLY SET TO 30 SEC)
- S8 0-255 SEC PAUSE FOR COMMA IN DIAL STRING (NORMALLY SET TO 2 SEC)
- S9 1-255 .1SEC CARRIER VALIDATION TIME NORMALLY 6 (.6 SEC)
- S10 1-255 .1SEC LOSS OF CARRIER DISCONNECT DELAY NORMALLY 14 (1.4 SEC)
- S11 50-90 .1SEC BETWEEN NUMBER DIAL DELAY. UNDOCUMENTED. IMPROVE DIAL
- SPEED. I LIKE 55. THE DEFAULT IS 90.
- S12 20-255 .02SE ESCAPE SEQENCE PAUSE NORMALLY 50 (1.0 SEC)
- S13 * POWER UP ASYNC DATA FORMAT (USE CHART BELOW)
- S14 * OPTION STATUS (USE CHART BELOW)
- S16 * TEST STATUS (USE CHART BELOW)
- S18 0-255 SEC TEST TIMER (REMOTE TEST)
- S21 * OPTION STATUS (USE CHART BELOW)
- S22 * OPTION STATUS (USE CHART BELOW)
- S23 * OPTION STATUS NORMALLY 07 (USE CHART BELOW)
- S25 0-255 SEC DTR DETECT DELAY NORMALLY 5 SEC
- ASYNC MODE, SYIC AUTO-DIAL AND SYIC MANUAL DIAL MODE .05 SEC
- S26 0-255 MS RTS TO CTS DELAY (1 MS)
- S27 * OPTION STATUS (USE CHART BELOW)
-
- * REGISTERS USED BY MODEM PROCESSOR. DO NOT ALTER THESE
- ** READ ONLY REGISTERS
-
- S13 DATA FORMAT:
-
-
- POSITION VALUE FUNCTION
- BIT 0 - NOT USED
- BIT 1 - NOT USED
- BIT 2 0 PARITY OFF
- 1 PARITY ON
- BIT 3 0 ODD PARITY
- 1 EVEN PARITY
- BIT 4 0 7 DATA BITS
- 1 8 DATA BITS
- BIT 5 0 BIT 8=0
- 1 BIT 8=1
- BIT 6 - NOT USED
- BIT 7 - NOT USED
-
- S14 DATA FORMAT:
- BIT 0 - NOT USED
- BIT 1 0 LOCAL CHARACTER ECHO OFF
- 1 LOCAL CHARACTER ECHO ON
- BIT 2 0 STATUS DISPLAYS ON
- 1 STATUS DISPLAYS OFF
- BIT 3 0 STATUS CODES SENT
- 1 STATUS MESSAGES SENT
- BIT 4 0 MODEM RESPONDS TO COMMANDS
- 1 MODEM IGNORES COMMANDS
- BIT 5 0 TONE-DIALING
- 1 PULSE-DIALING
- BIT 6 - NOT USED
- BIT 7 0 ANSWER MODE
- 1 ORIGINATE MODE
-
- S16 DATA FORMAT:
- BIT 0 0 ANALOG LOOP OFF
- 1 ANALOG LOOP ACTIVE
- BIT 1 - NOT USED
- BIT 2 0 DIGITAL LOOP OFF
- 1 DIGITAL LOOP ACTIVE
- BIT 3 0 REMOTE DIGITAL LOOP REQUESTED BY OTHER MODEM IS OFF
- 1 REMOTE DIGITAL LOOP REQUESTED BY OTHER MODEM IS ACTIVE
- BIT 4 0 REMOTE DIGITAL LOOP OFF
- 1 REMOTE DIGITAL LOOP ACTIVE
- BIT 5 0 SELF TEST RDL OFF
- 1 SELF TEST RDL ACTIVE
- BIT 6 0 SELF TEST ANALOG LOOP OFF
- 1 SELF TEST ANALOG LOOP ACTIVE
- BIT 7 - NOT USED
-
- S21 DATA FORMAT:
- BIT 0 0 RJ11/RJ41/45 JACK TYPE
- 1 RJ12/FJ13 JACK TYPE
- BIT 1 - NOT USED
- BIT 2 0 CTS FOLLOWS RTS
- 1 CTS FORCED ON
- BIT 3&4 0 MODEM IGNORES DTR
- 1 MODEM ASSUMES COMMAND STATE WHEN DTR TURNS OFF
- 2 MODEM ASSUMES COMMAND STATE AND DISABLES AUTO-ANSWER
- WHEN DTR TURNS OFF
- 3 MODEM RESETS WHEN DTR TURNS OFF
- BIT 5 0 DCD FORCED ON
- 1 DCD FOLLOWS CARRIER
- BIT 6 0 DSR FORCED ON
- 1 DSR BEHAVES NORMALLY
- BIT 7 0 LONG SPACE DISCONNECT DISABLED
- 1 LONG SPACE DISCONNECT ENABLED
-
- S22 DATA FORMAT:
- BIT 0&1 1 LOW SPEAKER VOLUME
- 2 MEDIUM SPEAKER VOLUME
- 3 HIGH SPEAKER VOLUME
- BIT 2&3 0 SPEAKER ALWAYS OFF
- 1 SPEAKER ON UNTIL CARRIER DETECTED
- 2 SPEAKER ALWAYS ON
- 3 SPEAKER OFF DURING DIALING THEN ON UNTIL CARRIER DETECTED
- BIT 4&5&6 0 X COMMAND IN EFFECT
- 4 X 1 COMMAND IN EFFECT
- 5 X 2 COMMAND IN EFFECT
- 6 X 3 COMMAND IN EFFECT
- 7 X 4 COMMAND IN EFFECT
- BIT 7 0 39/61 MAKE/BREAK RATIO (PULSE DIALING)
- 1 33/67 MAKE/BREAK RATIO
-
- S23 DATA FORMAT:
- BIT 0 0 REMOTE DIGITAL LOOP REQUEST DENIED
- 1 REMOTE DIGITAL LOOP REQUEST GRANTED
- BIT 1&2 0 0-300 BPS
- 1 600 BPS
- 2 1200 BPS
- 3 2400 BPS
- BIT 3 - NOT USED
- BIT 4&5 0 EVEN PARITY
- 1 PARITY BIT ALWAYS 0
- 2 ODD PARITY
- 3 PARITY BIT ALWAYS 1
- BIT 6&7 0 NO GUARD TONES
- 1 550 HZ GUARD TONE
- 2 1800 HZ GUARD TONE
-
- S27 DATA FORMAT:
- BIT 0&1 0 ASYNCRONOUS MODE
- 1 ASYNC/SYNC MODE
- 2 SYNC AUTO-DIAL
- 3 SYNC MANUAL DIAL
- BIT 2 0 PUBLIC PHONE LINE
- 1 LEASED LINE
- BIT 3 - NOT USED
- BIT 4&5 0 INTERNAL CLOCK USED
- 1 EXTERNAL CLOCK USED
- 2 SLAVED CLOCK USED
- BIT 6 0 CCITT V.22 PROTOCOL (1200 BPS)
- 1 BELL 212A (1200 BPS)
- BIT 7 - NOT USED
- OTHER MODEM COMMANDS:
- AT STANDARD LEAD IN SEQUENCE (ATTENTION)
- ATA FORCE ANSWER
- ATD DIAL (ATD ###-#####)
- P PULSE (ATDP ###-####)
- T TONE (ATDT ###-####)
- ATE1 ENABLE LOCAL CHARACTER ECHO
- ATE0 DISABLE LOCAL CHARACTER ECHO
- ATH1 FORCE LINE CONNECT
- ATH0 FORCE LINE DISCONNECT
- ATI ECHO VERSION TYPE
- ATL1 SPEAKER VOLUME LOW
- ATL2 SPEAKER VOLUME MEDIUM
- ATL3 SPEAKER VOLUME HIGH
- ATM0 SPEAKER ALWAYS OFF
- ATM1 SPEAKER ON EXCEPT WHILE CARRIER PRESENT
- ATM2 SPEAKER ALWAYS ON
- ATM3 SPEAKER ON EXCEPT WHILE DIALING AND CARRIER PRESENT
- ATO GO ONLINE AFTER ESCAPE OR WHILE IN COMMAND MODE
- ATQ0 STATUS DISPLAY ON
- ATQ1 STATUS DISPLAY OFF
- ATV0 STATUS MESSAGES SENT
- ATV1 STATUS CODES SENT
- ATX0 "CONNECT" (CODE 1) ALL SPEEDS NO DIAL TONE DETECTION
- ATX1 "CONNECT" (CODE 1) 0-300 BPS OR "CONNECT 1200" FOR 1200 OR
- "CONNECT 2400" FOR 2400 BPS NO DIAL TONE DETECTION
- ATX2 WAIT FOR DIAL TONE (CONNECT SPEEDS SHOWN AS FOR X1)
- ATX3 DETECT BUSY SIGNAL (CONNECT SPEEDS SHOWS AS FOR X1)
- ATX4 WAIT FOR DIAL TONE, DETECT BUSY SIGNAL (CONNECT SPEEDS SHOWS AS FOR X1)
-
- ATZ RESET TO POWER UP CONDITION (CLEARS ALL REGISTERS)
-
-
-
- 2400 MODEM SPECIAL COMMANDS: (* = FACTORY SETTING STANDARD)
- ATB0 CCITT V.22 AT 1200 BPS
- ATB1 BELL 212A AT 1200 BPS *
-
- AT &F RESTORE TO FACTORY CONFIGURATION
- AT &G NO GUARD TONE *
- AT &G1 550 HZ GUARD TONE
- AT &G2 1800 HZ GUARD TONE
- AT &J RJ11/RJ41S/RJ45 JACK *
- AT &J2 RJ12/RJ13 JACK
- AT &L REGULAR PHONE LINE *
- AT &L1 LEASED LINE
- AT &M ASYNC OPERATION *
- AT &M1 ASYNC/SYNC OPERATION
- AT &M2 SYNC AUTO DIAL
- AT &M3 SYNC MANUAL DIAL
- AT &P 39/61 PULSE MAKE/BREAK RATIO *
- AT &P1 33/67 PULSE MAKE/BREAK RATIO
- AT &T4 GRANT RDL TEST REQUEST *
- AT &T5 DENY RDL TEST REQUEST
- AT &W WRITE CURRENT REGISTERS TO NON-VOL-MEMORY (KEEP FOR POWER UP)
- AT &X SYNC CLOCK INTERNAL *
- AT &X1 SYNC CLOCK EXTERNAL
- AT &X2 SYNC CLOCK SLAVED
- AT &Z STORE DIAL COMMAND LINE
-
- DATA INTERFACE (2400)
- AT &C DCD ALWAYS ON *
- AT &C1 DCD ON WHILE CARRIER PRESENT
- AT &D DTR IGNORED *
- AT &D1 DTR FAIL DISCONNECT ENABLED (MODEM RETURNS TO COMMAND MODE)
- AT &D2 DTR FAIL DISCONNECT ENABLED (MODEM RETURNS TO COMMAND MODE, TURN
- AUTO ANSWER OFF)
- AT &D3 DTR FAIL DISCONNECT ENABLED (RESET MODEM)
-
-
- This information provided to you by David Scheall. I can be reached at
- CompuServ 71360,2662 or at GEnie by sending mail to address D.Scheall.
- I hope you find this usefull!