Modem At Commands; Modem S-Registers - IBM 10/100 Ethernet Mini-PCI Adapter User Manual

Modem AT commands

Attention: In most cases, your modem will work using the factory-set defaults. If you are
not experienced in using modems, do not change the settings.
To view a list of available modem AT commands and their functions, open the
ATCOMS.TXT file on the IBM10/100 Ethernet Mini-PCI Adapter with 56K Modem by
3Com CD.
You can issue AT commands from several places, but it is the most common to issue AT
commands while in the terminal mode of your communications software.
Follow these guidelines when you issue AT commands:
• Type commands in all upper-case letters or all lower-case letters, but not in a
combination of cases.
• You can enter up to 60 characters, not counting AT, carriage returns, or spaces. You
are not required to enter spaces. However, entering spaces makes a long string of AT
commands easier to read.
• If you leave the number off of a command, zero is assumed. For example, if you type
ATE, ATE0 is assumed.
• You must prefix every command except A/ and +++ with AT and issue the command
by pressing Enter.
• The modem responds with OK, ERROR, or another result code. For more information
on result codes, open the ATCOMS.TXT file on the CD that comes with your
notebook computer.
For example, use the following steps if you want to view the version of firmware used in
your modem.
1. Find the AT command (I3) that controls viewing firmware information in the
ATCOMS.TXT file on the IBM10/100 Ethernet Mini-PCI Adapter with 56K Modem
by 3Com CD. The file contains an alphabetical list of the AT command functions.
2. Open your communications software.
3. Access Terminal mode.
4. Most commands to the modem require the AT prefix. Type ATI3, and then press
Enter. The firmware version displays.

Modem S-Registers

To view a list of available S-Registers and their functions, open the SREG.TXT file on the
IBM 10/100 Ethernet Mini-PCI Adapter with 56K Modem by 3Com CD.
The AT command settings are stored in the S-Registers. S-Register values can be changed
by issuing an AT command or by entering the new value of the S-Register, preceded by
AT. For example:
ATSn=v
is an AT command where n is the number of the S-Register you want to change and v is the
new value of that S-Register.
3. Connecting and using the 3Com V.90 Mini-PCI modem
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