Notes:In Reference Column, "AT" is omitted when AT command is referred to (Snnbx) Means cross reference to S-register nn bit number x
| Command | | Function and description |
|---|
| A/ | | Re-execute last command |
| A> | | Repeat last command continuously |
| <any key> | | Terminate current connection attempt |
| +++ | | Escape sequence code, entered in data state, wait for modem to return to command state |
| ATA | | Force answer mode (S39b2) |
| ATBn | Bn | Handshake option (S28b7) |
| B0 | Select CCITT V.22 for 1200 bps |
| | B1 | Select Bell 212A standard for 1200 bps |
| ATD | | Dial number and options that follows (S38b0, S35b4) |
| | P | Pulse dial (S23b1) |
| | T | Tone dial (S23b1) |
| | , | Pause for a time specified in S6 |
| | ; | Return to command state after dialing |
| | ! | Hook flash, call transfer |
| | W | Wait for second dial tone |
| | @ | Wait for a 5-second silence before proceeding, otherwise return 'NO ANSWER' |
| | R | Reverse frequencies (Originate a call in answer mode) (S17b5) |
| ATDL | | Dial last number |
| ATDSn | n=0-9 | Dial number stored in NVRAM at position n |
| ATEn | | Command mode local echo of keyboard commands. (S23b0) |
| | E0 | Echo off |
| | E1 | Echo on |
| ATHn | | On/off hook control |
| | H0 | Hang up (on hook) |
| | H1 | Go off hook |
| ATIn | | Display inquiry |
| | I0 | Display product code |
| | I1 | Display product info. & results of ROM checksum |
| I2 | | Link status report
|
| ATLn | n=0-7 *4 | Speaker volume control (S24b5) |
| ATMn | | Speaker control |
| | M0 | Speaker always Off (S21b1) |
| | M1 | Speaker On until carrier is established |
| | M2 | Speaker always On |
| | M3 | Speaker On after last digit dialed, Off at carrier detect |
| ATNn | n=0-7 *5 | Ring volume control, n=0 Disable the ring function (S241) |
| ATO | | Return to on-line state |
| ATP | | Pulse dial |
| ATQn | | Result code displayed (S23b6) |
| | Q0 | Modem returns result code |
| | Q1 | Modem does not return result code |
| | Q2 | Quiet in answer mode only (will not show in AT&Vn)(S40b1 S42b2) |
| ATSr.b=n | | Set bit .b of register r to n (0/off or 1/on). |
| ATSr.b? | | Inquiry bit .b of register r |
| ATSr=n | | Set S-register r to value n, n must be a decimal number between 0-255 |
| ATSr? | | Display value stored in S-register r |
| ATT | | Tone dial |
| ATVn | | Verbal/Numeric result codes (S23b6) |
| V0 | | Display result codes in numeric form (S35b7) |
| V1 | | Display result codes in verbose form |
| ATXn | n=0-7 *5 | Result code options, use the options table (S23b3) |
| ATZn | n=0-4 | Modem reset |
| | Zn | Reset modem and load user profile n (S15b5) |
| | Z4 | Reset modem and load factory settings |
| AT$ | | Help, Basic command summary |
DIENSTE
