Airlink AML001 Manual - Page 30
Appendix A AT Commands, A.1 AT Commands, A.1.1 Data and General Commands
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Appendix A AT Commands AT Command Set AT commands are issued to the modem to control the modem's operation and software configuration. The basic command syntax is as follows: The is a combination of the attention prefix (AT) followed by the AT command. The is a string which represents a numeric decimal value. Note: If a parameter value is not entered then the soft modem assumes a parameter value of zero. Any command issued is acknowledged with a response in either text or numeric values. These responses are known as result codes. AT commands can only be entered while the modem is in command mode. Command mode is entered under one of the following conditions: ! After powerup, at the termination of a connection, or after the execution of a command other than dial or answer. ! Upon the receipt of the escape sequence (three consecutive characters matching the contents of register S2) while in on-line mode. ! Upon the on-to-off transition of DTR if &D1, &D2, or &D3 has been set. A.1 AT Commands A.1.1 Data and General Commands +++Escape Sequence An escape sequence allows the modem to exit data mode and enter on-line command mode. While in on-line command mode, AT commands are sent directly to the modem. Use the return to on-line data mode command (see O-Return to On-Line Data Mode) to return to data mode. Place a pause before and after the escape sequence to prevent the modem from interpreting the escape sequence as data. The length of the pause is set 29