Lucent Technologies AT&T 7400B - Manual (Page 26)

DEFINITY Communications System CHAPTER 3: FIRST TIME USERS
7400B Data Module
User’s Guide Page 3-3
AT Command Description
AT The command prefix that must be typed as the first two letters of
all
AT commands except +++ and A/. This prefix gets the
tention of the data module. AT
Note: The characters of the AT prefix must both be typed in
either uppercase or lowercase letters (AT or at will
work, but At or aT will not). Typing a space between
the AT prefix and the next command on the line is
optional, but do not separate the two letters “AT” with
a space.
D
A/
The Dial command. This command follows the AT and precedes
the number that you wish your data module to dial. For example:
atd71204 [ Enter ]
Note: Other commands may precede the D command, but
any characters following it will be interpreted as part
of the number that is to be dialed.
The redo or Again command. This is one of the two commands
that does not require the
AT prefix. To repeat the previous
command line exactly, type A/ without pressing [ Enter ].
(more)
TABLE 3-2 AT Command Subset