The Options - Atari SX 212 Owner's Manual

The Options
c
The C option allows you to turn the modem's carrier signal on
and off. By default, the transmitter is on and the modem turns the
carrier signal on and off automatically. For example, the modem
turns the signal on when it originates and answers a call and
when it is online. You can turn the transmitter off if you want to
use your modem only for dialing calls (that you would normally
dial yourself on the telephone) by typing the command ATCO.
E
The E option lets you determine whether the characters you
type while in the local command mode are displayed on the
screen. Since most computers support full-duplex communi¬
cation, the default is set to "echo" the command characters
you type and display them on the screen. If you are using a
half-duplex computer or terminal, turn the echo option off by
typing ATEO.
H
The H option lets you control how the modem goes on hook
(hangs up) and off hook (uses the telephone line). By default,
the modem goes off hook automatically only when it origi¬
nates (dials) or answers a call; otherwise it is on hook and
not using the telephone line. If you want to manually com¬
mand the modem to go off hook, type ATH1.
I
The I option prompts the modem to display one of two values
—a three-digit product code that identifies the modem and
its revision number, or a checksum value that is used in
manufacturing to test the modem. (The checksum is a hexa¬
decimal code for the software in the modem's ROM chip.)
This option is not used for telecommunications.
M
The M option lets you control when the modem's speaker is
on. By default, the speaker is always on until a carrier signal
is detected; then it's turned off. This setting allows you to
hear the progress of your call, such as the dial tone, the dial¬
ing process, and a busy signal or carrier signal. If you want
to listen in on a call after a connection is made, type ATM2.
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