4.2 AT COMMANDS
Refer to the following AT Command Set Chart below. This chart identifies the command function and describes the elements of the command.
|
| AT Command Sets |
|
| |
Command | Description | |
A |
| Answer Command |
|
| Forces the modem to go |
|
| without waiting for a ring. |
|
|
|
A/ |
| Repeat Last Commannd |
|
| Repeat the last command line it executed. Not |
|
| preceded with AT nor followed by pressing the |
|
| [Enter] key. |
|
|
|
Bn |
| Select |
| ATB0 | Selects |
|
| Call Establishment . (Default) |
| ATB1 | Selects BELL operation at 300bps or 1200bps during |
|
| Call Establishment. |
|
|
|
Dn |
| This command directs the modem to go |
|
| according to the string entered and attempt to establish |
|
| a connection. |
|
|
|
En |
| Echo Command |
| ATE0 | Disables command echo |
| ATE1 | Enables command echo (Default) |
|
|
|
Hn |
| Hang Up the Telephone Line |
| ATH0 | The modem will release the line if the modem is |
|
| currently |
|
| is in progress. (Default) |
| ATH1 | If |
|
| command mode. |
|
|
|
|
| AT Command Sets (continued) | |
|
|
| |
Command |
| Description | |
|
|
|
|
In |
|
| Identification Command |
| ATI0 |
| Reports product code "56000". |
| ATI1 |
| Calulates the ROM checksum and reports the least |
|
|
| significant byte of the checksum in decimal. |
| ATI2 |
| Calculated the ROM checksum and compares it with |
|
|
| the prestored checksum. |
| ATI3 |
| Reports firmware revision (F), basic model (e.g., V34), |
|
|
| application code (A), and interface type code (I) |
|
|
| typically in the form |
| ATI5 |
| Reports Country Code parameter. |
| ATI6 |
| Reports modem data pump model and internal code |
|
|
| revision. |
|
|
|
|
Ln |
|
| Speaker Volume Control |
| ATL0 |
| Low speaker volume |
| ATL1 |
| Low speaker volume (Default) |
| ATL2 |
| Medium speaker volume |
| ATL3 |
| Higher speaker volume |
|
|
|
|
Mn |
|
| Speaker Control |
| ATM0 |
| Speaker is always off. |
| ATM1 |
| Speaker is on during call establishment, but off when |
|
|
| receiving carrier. (Default) |
| ATM2 |
| Speaker is always on. |
| ATM3 |
| Speaker is off when receiving carrier and during dialing, |
|
|
| but on during answering. |
|
|
|
|
Nn |
|
| Set Multi- or Fix- Mode Handshake |
| ATN0 |
| Automode detection is disabled. |
| ATN1 |
| Automode detection is enabled. (Default) |
|
|
|
|
On |
|
| Return to |
| ATO0 |
| Enters |
| ATO1 |
| Enters |
|
|
| to |
|
|
|
|
P |
|
| Set Pulse Dial |
|
|
| This command forces pulse dialing until the next T dial |
|
|
| modifier or T command is received. |
|
|
|
|
Qn |
|
| Quiet Results Code Control |
| ATQ0 |
| Enables result codes to the DTE. (Default) |
| ATQ1 |
| Disables result codes to the DTE. |
|
|
|
|
Sr=n |
|
| Read / Write |
| ATSr=n |
| Sets |
| ATS? |
| Reports the value of |
|
|
|
|
7 | 8 |
