Northern UTA220/UTA220k Manuel D’Utilisation

Page de 187
UTA220/UTA220k
8-3
 AT Command Operation
The characters the AT command interpreter uses as end-of-
line, line feed, and backspace are set respectively by the S3, 
S4, and S5 commands and can be changed.
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 555-1212
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.