Operating Your Modem - IBM Aptiva Hardware Handbook

14,400 bps data modem with 14,400 bps send
and receive fax capability: This modem is GVC
F-1114HV/R1 or /R6; it supports Class 2 fax commands
and V.42bis.
Some IBM Aptiva PCs in the U.S. and Canada, and some
models in other countries, may have built-in modems
note: with more features than the modems listed here. If you
have one of these models, refer to the modem documen-
tation that came with your computer.

Operating your modem

You can operate your modem either through a modem
communications software application or from your DOS
prompt.
Most people use a communications software application
to operate their modem. Examples of these software
applications include Windows Terminal, PFS:Window-
Works** Terminal, and Microsoft Works for Windows**
Terminal. These applications allow you to operate your
modem without using the Hayes** AT command set—
the commands that modems understand. With these
software applications, you operate your modem by
choosing menu items from a screen on your computer.
If you use a communications software application, see
the user's guide that came with the software for detailed
instructions on operating your modem.
Most modem communication software applications also
note:
allow you to send specific AT commands to the modem.
You can also send commands to your modem from the
DOS (C:>) prompt. Operating your modem with DOS is
difficult and generally for experienced modem users
20 About built-in modems
only. With DOS, you must type long AT command
strings and you may need to send a variety of com-
mands for each transmission. Also, you are not always
sure if your commands have been received and exe-
cuted by the modem.
To communicate with a modem from DOS, use the
ECHO command. Direct these commands to the port
your modem is connected to. For example:
C:\ > echo ATS0=0&W0&W1>COM1 and press
Enter.
This is an AT command that:
•
Stores a 0 into S register 0 to turn Auto Answer off
(ATS0=0). S registers are storage areas inside the
modem. The S registers hold values that the com-
mand set uses to control modem operations. For
more information on S registers, see page 33.
•
The &W0&W1 portion of the command stores
ATS0=0 into memory (NVRAM locations 0 and 1) for
future use.
•
The command is directed to the modem's port
(>COM1).
Whether you use DOS or a modem communications
software application, you can send a wide variety of
commands to your modem. For a detailed listing of
modem commands see page 29.