Setting up your ISP information .................................................1-16
Other Operating Systems ................................................................1-17
If You Are Using Windows 3.x ...................................................1-17
If You Are Using MS-DOS ...........................................................1-17
If You Are Using UNIX, Linux, or AIX ..........................................1-17
2
U
SING
THE
AT C
OMMAND
S
ET
Overview ..........................................................................................2-1
General rules for using AT commands ..........................................2-1
Basic AT commands .........................................................................2-2
Using S-Registers ..............................................................................2-2
Displaying S-Register settings .......................................................2-3
Setting an S-Register ....................................................................2-3
Getting a list of S-Registers ..........................................................2-4
Understanding bit-mapped S-Registers ..............................................2-4
3
M
ODES
OF
O
PERATION
Command and Online Modes ...........................................................3-1
Entering Online Command Mode ................................................3-2
Returning to Online Mode ...........................................................3-2
Controlling Local Echo ......................................................................3-3
Command-Mode Local Echo ........................................................3-3
Online-Mode Local Echo ..............................................................3-3
Data and Fax Modes .........................................................................3-4
4
D
IALING
, A
NSWERING
,
AND
H
ANGING
U
P
Dialing ..............................................................................................4-1
Dial options .................................................................................4-1
Carrier Loss Redial .............................................................................4-3
Answering Calls ................................................................................4-4
Force Answer Mode .....................................................................4-4
Auto Answer ...............................................................................4-4
Hanging up .................................................................................4-5
Making International calls .................................................................4-5
Handshaking options ...................................................................4-5
Guard tone ..................................................................................4-6
