2 USING THE AT COMMAND S ETThis chapter includes information aboutn Basic AT commandsn Using S-Registersn Understanding bit-mapped S-RegistersOverview You can use AT commands to change your modem settings at any time.To send AT commands to your modem, you need to put yourcommunications software in Terminal Mode. In terminal mode, what youtype is sent directly to the modem.General rules forusing AT commandsYou must follow some general guidelines to send AT commands to yourmodem:n Type AT before each command and press after eachcommand.The exceptions are A/, A> and +++, which require neither AT nor.n Leave zeroes off the end of AT commands. A missing numericparameter is assumed to be a zero. For example, ATE is equivalent toATE0.n Create compound commands of up to 56 characters between AT and. See the following example.
