Operator`s manual
I
7
HELPFUL
DEFINITIONS
ANSWER
MODE:
This
mode
on
the
modem
indicates
which
terminal
is
receiving
the
communication
call.
In
the
ANSWER
mode
you
must
manually
answer
the
telephone
and
switch
the
ANS/OFF/ORIG
control
to
ANS.
BAUD:
The
unit
measurement
of
communication
speed,
usually
measured
in bits-
per-second.
CompuServe: A
personal
computing
service
that
provides
computer
programs,
data
bases, and
other
services
to
its
customers.
DOW
JONES
INFORMATION
SERVICES:
Instantaneous
access
to
the
informa-
tion
resources
of
Dow
Jones &
Co
., Inc.,
Reliable
and
concise
business
and
finan-
cial
news
from
The
Wall
Street Journal, Barrons,
Dow
Jones News Wire,
and
other
associated
data
services.
DUPLEX: A
general
term
referring
to
a
communication
circuit
in
which
each
end
transmits
and
receives.
FULL-DUPLEX: A
communication
system in
which
each
end can
simultaneously
transmit
and
receive.
HALF-DUPLEX: A
communication
system in
which
each
end
can
transmit
and
receive
data
in
either
direction,
but
not
simultaneously.
MARK: Signal
equivalent
to
binary
1.
ORIGINATE
MODE:
This
mode
on
the
modem
indicates
which
terminal
is
ini-
tiating
the
communication
link
.
PARITY:
Parity
is
a
method
of
checking
binary
numbers.
An
extra
bit
called
a
pari
-
ty
bit
is
added
to
the
number
.
Telelink
I
transmits
even
parity,
and
ignores
parity
received
. This
allows
Telelink
I
to
receive
data
from
systems
transmitting
even,
odd,
or
no
parity.
RS232: For
communication
between
computers
and
computer-related
equip-
ment,
the
industry
standard
is
the
E
lA
RS232C. This
method
was
adopted
by
the
Electronic
Industries
Association
to
ensure
interface
uniformity
between
data
communication
equipment
and
data
processing
terminal
equipment.
The
AT
ARJ®
850™
Interface
Module
is
equipped
with
four
RS232
interface
ports.
SPACE:
Signal
equivalent
to
binary
0.
THE SOURCE:
The
Source
is
a
time-shared
service
offering
personal
computing
programs
and
data
bases.
XOFF: Signals
remote
computer
to
stop
sending
data
. XOFF
is
Emil
S.
XON:
Signals
remote
computer
to
begin
sending
data.
XON
is
IIID
Q.
Helpful
Definitions 15