A3LA-R-MIL-MOD User Guide Version B
Document Number: 451-93156-001A
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Iridium Satellite Product Proprietary Commands:
o
–MS prefix
o
Proprietary to the Iridium product line
A.4 C
OMMAND AND
R
ESPONSE
C
HARACTERS
The execution of a command string follows a left-to-right execution of each command followed
by the reporting of a result code for the entire string. The ASCII character set (CCITT T.50
International Alphabet 5, American Standard Code for Information Interchange) is used for the
issuance of commands and responses. Only the low-order 7 bits of each character are used for
commands or parameters; the high-order bit is ignored. Uppercase characters are equivalent to
lowercase characters.
A.5 C
OMMAND
E
NTRY
An AT command is a string of characters sent by the DTE to the A3LA-R while it is in command
mode. A command string has a prefix, a body, and a terminator. The prefix consists of the ASCII
characters AT or at. The body is a string of commands restricted to printable ASCII characters.
The default terminator is the <CR> character. AT command entry syntax is critical, and the
following rules apply:
All commands (apart from A/ and +++) begin with a prefix of AT or at.
The commands in a command string (apart from A/ and +++) are executed only after
pressing the Return or Enter key.
Use of uppercase or lowercase letters is allowed, but not a combination of both.
The maximum number of characters in a command string is 128.
If the numeric parameter n is omitted from the basic command entry, a value of zero is
assumed for n.
If an optional parameter is omitted from an extended command, the current value is
implied. Optional parameters are enclosed by square brackets ([...]) in this document.
Spaces entered into a command string for clarity between the AT prefix and the body
of the command are ignored. Likewise, spaces entered for clarity within the command
body between alpha characters and decimal parameters are ignored.
The backspace or delete keys can typically be used to edit commands.
