S Register Values - 3Com 3CCFEM556 User Manual

Entering AT Commands
AT commands are instructions typed at the command line
of any communications application. A communications
application is in command mode when the application is
started but the modem has not yet dialed. When your
application is in command mode, the AT commands you
type are sent directly to the modem.
The most common way to enter AT commands is from
terminal mode in your communications software. The basic
rules for entering AT commands are:
The complete AT command set is described in the file
ATCMDS.TXT in the Help directory on Installation Disk 2.
You can also download the latest AT-command text file
from the 3Com Support BBS at 1-408-980-8204 or copy
it from the 3Com Megahertz World Wide Web site at
www.mhz.com/intransit/support/.

S Register Values

The AT command settings are stored in the S Registers.
S-Register values can be changed either by entering an AT
command or by entering the new value of the S Register,
preceded by AT, like this:
ATSn=v
where n is the number of the S Register you want to change
and v is the new value of that S Register.
All AT command lines must begin with the prefix AT.
Spaces between command characters (and option
characters) are ignored.
Command line parameters cannot exceed 255
characters.
Use a carriage return [Enter] to enter a command line.
Commands take effect as soon as they are received.
Type commands in either upper or lower case, not a
combination.
If you leave the number off a command, zero is
assumed. For example, if you type
Advanced Modem Features
,
ATE ATE0
41
is assumed.