0049-0867-01X 2
nd
Generation MIU14.4L – USER’S GUIDE 6/22/2011
Rev. A
Page 18 of 39
SUMMARY OF THE ROCKWELL "AT" COMMAND SET
To communicate using the modem, use an asynchronous communication program. The command set for
the Raymar-Telenetics modems is compatible with the Hayes command set.
The modem is controlled and configured by the AT (attention command). Each command consists of the
following elements (with the exception of the A/ and the +++ command that will be discussed later).
1. The two character sequence AT
2.
A
command
3.
A
command
parameter
4.
A
carriage
return
A command is not entered until a carriage return <ENTER> is entered. Spaces entered are ignored. For
example, to enter the command ‘Answer’, type ATA and <ENTER>.
Some commands do not have parameters. Any missing parameters in a command are assigned the value
zero, which may be a valid parameter for the command. The sequence followed by AT command causes
the modem to enter a command state. That is, AT without a command serves as a wake up code and an
"OK" appears on the screen.
The modem queues commands in a 40-character command line. The command line begins with AT and
can have several commands. A separator is not required between the commands.
The command line format is the "AT" prefix, followed by the required commands from the attached list
and terminated with a Carriage Return.
When a carriage return is received, the commands are performed in the order in which they are sent to the
modem. If more than 40 characters are sent to the modem, an error occurs and all commands must be re-
entered.
Summary of Contents for Telenetics MIU14.4L
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