Chapter 2 – AT Commands
Chapter 2 – AT Commands
General Commands
Command: | AT | Attention Code | |
Values: |
| n/a |
|
Description: |
| The attention code precedes all command lines except A/ and the escape sequence. | |
Command: |
| Enter Key | |
Values: |
| na |
|
Description: |
| Press the ENTER or RETURN key to execute most commands. | |
Command: | A | Answer | |
Values: |
| na |
|
Description: |
| Answers an incoming call before the final ring. | |
Command: | A/ | Repeat Last Command | |
Values: |
| n/a |
|
Description: |
| Repeats the last command string. Do not precede this command with AT. Do not press | |
|
| ENTER to execute. | |
Command: | Bn | Communication Standard Setting | |
Values: |
| n = 0 or 1 | |
Default: |
| 1 |
|
Description: |
| B0 Selects | |
|
| B1 | Selects Bell 212A when the modem is at 300 or 1200 bps. |
Command: | Ds | Dial |
|
Values: |
| s = dial string (phone number and dial modifiers) | |
Default: |
| none |
|
Description: |
| Dials telephone number s, where s may be up to 40 characters long and include the | |
|
| following dial string modifiers. | |
|
| Digits 0 through 9 | |
|
| * | The “star” digit (tone dialing only) |
|
| # | The “pound” digit (tone dialing only) |
|
| ||
|
| L | Redials last number. (Must be placed immediately after ATD.) |
PSelects
T Select
W Wait for a new dial tone before continuing to dial.(X2 or X4 must be selected.)
,Pause during dialing for time set in
;Return to command mode after dialing. (Place at end of dial string.)
!Hook flash. Causes the modem to go quicking
@ Wait for silence. Causes the modem to wait for 5 seconds of silence before processing the next part of the command. If silence is not detected within the time set in
^ Toggle data calling tone on or off. Applies only to current dialing attempt.
& Detect credit card “bong” tone. If the tone is not detected within the time specified by S7 (US models), the modem aborts the rest of the sequence and hangs up. The character should follow the phone number and precede the user’s calling card number; e.g., ATDT1028806127853500&123456789.
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