AT Command Reference
INSYS Modem 56k small EU 2.1
44
15
AT Command Reference
Each AT command starts with the letters AT and ends with a carriage return (CR). Both,
upper and lower case letters are accepted; however, the leading letters must either be
AT
or
at
. The command line will be evaluated as soon as the modem has received a carriage
return. A parameter, which is indicated with the letter
<n>
in the description, means that
it can be adjusted.
For example
ATL<n>
, where
<n>
can take on the values 0 to 3, thus e.g.
ATL2
(medium
volume). The modem uses always the parameter 0 for commands, which expect a pa-
rameter, but are specified without a parameter. The commands
ATZ
and
ATZ0
, for ex-
ample, show the same effect.
The factory default settings are indicated with "(default)".
The standard end character is "Carriage Return" (0Dh) or also known as "<CR>". No "Car-
riage Return" must be entered after entering "
+++
".
The commands are acknowledged with
OK
or
ERROR
. A command being
processed will be interrupted with every further incoming character. There-
fore, you must wait for the acknowledgement before entering the next
command, because otherwise the current command will be deleted.
