3Com 56K manual Using the AT Command SET, Overview, General rules for, Using AT commands

2

USING THE AT COMMAND SET

	This chapter includes information about
	■	Basic AT commands
	■	Using S-Registers
	■ Understanding bit-mapped S-Registers
Overview	You can use AT commands to change your modem settings at any time.
	To send AT commands to your modem, you need to put your
	communications software in Terminal Mode. In terminal mode, what you
	type is sent directly to the modem.
General rules for	You must follow some general guidelines to send AT commands to your
using AT commands	modem:

■ Type AT before each command and press <ENTER> after each command.

The exceptions are A/, A> and +++, which require neither AT nor <ENTER>.

■ Leave zeroes off the end of AT commands. A missing numeric parameter is assumed to be a zero. For example, ATE is equivalent to ATE0.

■ Create compound commands of up to 56 characters between AT and <ENTER>. See the following example.