User's Manual
V34bis Fax-modem - AJ 2885 P
AJ 2885 P - Page 18
3. Operation
The modem operation is usually controlled through its terminal interface that connects to a
computer or a terminal, and through a set of AT commands.
On the computer (a PC for example), start a communication software such as the Windows
HyperTerminal (HyperTerminal and Windows are trade marks of their respective owners).
The AJ2885 modem adapts automatically to the speed (300 to 115,200 BPS) and format of
characters sent by the computer when it receives the following characters :
AT
or
at
3.1.
Syntax of AT commands
Commands are built as follows :
AT xxxxxxx <RC>
•
AT
is the command prefix
•
xxxxxx
is the actual command and parameter
•
<RC>
complete the command line. This character corresponds to the ‘Carriage
return’ or ‘Enter’ key f the keyboard.
The following commands do not comply with this syntax :
•
A/ or a/
to repeat the last command
•
+++
to escape from connect data mode to local command mode
•
^Z^Z^Z
to escape from connect data mode to remote command mode
Modem sends back an answer when a command is competed :
•
OK
if the command is successfully completed
•
ERROR
in case of error in the command line
•
CONNECT
(or another message) in case of action command to place a call for
example
The AT and V25Bis reference manual provides the detail of the commands.
3.2.
First dialogue
You can then try the following commands :
AT<RC>
(<RC> or ENTER )
Modem answer :
OK
ATI3 <RC>
Answer:
AJ 2885P-FPVF Rev-5.10*
* example of product identification
AT&S <RC>
Answer : modem sends multiple pages of configuration and status.
This first dialog being completed, the chapter 5 for configuration and the reference manual
provide detailed description of the modem commands.
