DART 200 CDPD Modem User’s Guide | F DART AT Command Set |
Table F-2. Commands beginning with ampersand (&) (cont.)
&L Set DART Line Speed and Format
For serial ports, this command allows the Mobile Application Subsystem (MAS) to set the line speed and format. All subsequent communications between the MAS and the DART is at the new speed and format if the command completes successfully. These settings do not survive a modem power cycle unless saved with an &W.
The serial port interface to the MAS is configured to the line speed (300, 1200, 2400, 4800, 9600, or 19200), data bits per character (7 or 8), parity (O, E, N) and number of stop bits (1 or 2) specified. If any of these are invalid none of the settings are changed.
Regardless of the interface speed selected, the airlink speed is still 19200.
The modems default is 9600, 8N1 with autobaud active.
NOTE:
Executing this command disables the modem’s autobaud feature. This is desirable for most applications. However, autobaud can be reactivated if desired with the AT&L1 command.
Format:
AT&L<s>,<bps>
Deactivate autobaud feature and set the modem as specified
∙s = desired line speed
∙b = number of data bits (7 or 8)
∙p = parity (O for odd, E for even, N for none)
∙s = number of stop bits (1 or 2)
|
| Examples: AT&L9600,8N1 |
|
| AT&L19200,7E1 |
| AT&L1 | Reactivate autobaud feature |
| Result codes: |
|
| OK | Valid argument |
| ERROR | Invalid argument |
|
| |
&S | Set DSR Operation | |
| For serial ports, this command defines the operation of the data set ready signal (DSR) at the DART’s | |
| ||
| condition is true. Refer to Chapter 8, Application Programming, Data and control interface, for more | |
| information. |
|
| Format: |
|
| AT&S0 | DSR is always active (default) |
| AT&S1 | DSR follows the state of the Connection |
| AT&S2 | DSR follows the state of RF in Range |
| AT&S3 | DSR follows the state of Registration |
| Result codes: |
|
| OK | Valid argument |
| ERROR | Invalid argument |
|
|
|
|
