AT Command Operation
The characters the AT command interpreter uses as
The punctuation used in telephone numbers takes up space in the buffer, as do blank characters used as spaces to help increase readability.
BACKSPACE KEY
Use the backspace key to change the command statement or correct errors. The backspace key allows the cursor to be moved back to the character(s) in error. The command can then be retyped from that point.
Example: ATD5551211 has been typed. To change the last 1 to 2, press the backspace key once, type 2, and press return to execute the command.
REPEATING A COMMAND: A/
This command tells the TA to repeat the last command stored in its buffer. The command is automatically executed without any need to retype the command or press the return key.
Example: The ATD5551212 command has been executed, and the phone is busy. To repeat the instruction type A/, but do not use AT before this command, as AT would empty the buffer and there would be no command to repeat.
NUMBERED COMMANDS
Series of commands starting with the same letter are distinguished by a number following the letter.
For example, the E0 command selects echo off, and E1 selects echo on.
GROUP COMMANDS
A group of commands can be typed in a single statement. Pressing the RETURN key sends the entire command string to the TA, which executes each command, in the order it appears in the command statement, from left to right.
For example, the command statement ATQ0V0D5551212 means:
• AT Attention
•Q Allow status messages to be sent
•V Select status
•D Dial
The TA executes the AT command followed by the Q, V, and D commands. The TA returns the status message corresponding to the last command on the line. If an error is encountered in a command line, subsequent commands on the line are ignored.
UTA220/UTA220k |
