Intel LAN+Modem56 PC Card PRO/100 - Manual (Page 128)

6-4 PRO/100 LAN+Modem PC Card User’s Guide
AT Command Reference
With the exception of the “Special Commands” described at the beginning
of the Command Reference, all commands must be preceded by the AT
attention code (or command prefix) and terminated by pressing the Enter
key.
The modem responds with the result code OK, which means it under-
stands and can execute the command, or with ERROR, which means that
the modem does not understand the command or that the command is
invalid. For a complete list of result codes, see the beginning of this
chapter.
The modem must be in command mode when any command other than
the online escape sequence is entered. Commands entered when the
modem is in online mode are treated as data and transmitted as such to
the modem at the other end of the line.
Special Commands
+++ Online Escape Sequence
The escape sequence is used to switch to command mode from online
mode during a session with a remote modem. Type three “plus signs.” The
escape sequence is not preceded by the AT command prefix, nor does it
require the Enter key. The setting of S-Register S2 determines the ASCII
character used. S2=43 is the default (the “+” sign). 0-127 are valid. To
disable the command, set S2 to a value greater than 127. Use the ATO
(“AT” and letter “oh”) command to return to online mode.
Insert a pause before and after the escape sequence to prevent misinter-
pretation of the escape sequence as data. Use S-Register S12 to set the
length of the pause.
A/ Repeat Last Command
The A/ command causes the modem to repeat the last command string.
The command executes as soon as / is typed. It does not require the AT
command line prefix, nor does it need to be followed by Enter.