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GLOSSARY
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ASCII Abbreviation for American Standard Code for Information
Interchange (pronounced ask-ee). A set of standard 8-bit information
codes used by most microcomputers.
ATASCII Stands for ATARI ASCII. Letters and numbers in the ATASCII
character set have the same values as those in ASCII, but some of
the special characters are different. See ASCII.
Answer mode The default mode when the modem answers an
incoming call. See Originate mode
Auto-dial A feature that allows a phone call to be dialed from the
keyboard or automatically through a communications software
program.
Bell 103/212A compatibility A set of standards established by the
Bell System during the early days of telecomputing. These standards
define the parameters for 300 bps (103) and 1200 bps (212A) com¬
munication over the telephone lines.
Bits per second (bps) The speed at which bits are transmitted
during communication.
Echo The process of returning, or sending back, the characters you
type while in the local command mode (the modem's default).
Full-duplex Data transmission in both directions simultaneously;
similar to a telephone conversation in which both parties can talk
at the same time.
Half-duplex Data transmission in both directions, but only one
direction at a time; similar to a CB conversation in which only one
party can talk at a time.
Local command mode The state of being able to communicate
directly with your modem by entering commands.
Off hook Use of the telephone line described in terms of the tele¬
phone receiver being lifted from its cradle. When a modem is off
hook, it is connected to the telephone line.
On hook Disconnection from the telephone line described in terms
of the telephone receiver being in its cradle. When a modem is on
hook, it is disconnected from the telephone line.
Online The state of being connected to another computer system
over the telephone lines.
Originate mode The default mode when the modem dials a call
See Answer mode.
PBX Abbreviation for private branch exchange. A switching device
serving a single customer's telephone lines.
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