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AT&T 610 - Operations

AT&T 610
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User's
Guide
August
1985
Overview
6.
Operations
This
section
describes
the
mode
of
transnission
and
memory
access.
The
terminal
has
three
operational
states:
an
interactive
state,
a
setup
state,
and
a
self-test
state.
It
communicates
asynchronously
character-at-a-t:ime
only
(from
the
keyboard)
on-line.
Keyboarded
data
can
be
displayed
only
if
the
data
is
echoed
back
(local
or
remote)
to
the
terminal.
The
610
BCT
utilizes
the
ANSI
(American
National
Standards
Institute)
3.64
line
standard
where
applicable.
The
screen
consists
of
twenty-seven
lines
of
80
or
132
columns,
which
are
to
be
divided
into
twenty-four
scrollable
lines,
a
host
writeable
status
line,
and
two
screen
label
lines.
The
terminal
operates
in
full
duplex
on
a
point-to-point
private-line
or
switched
network.
The
terminal
requires
the
use
of
a
data
source
with
an
EIA
RS-232-C
interface.
Refer
to
Sec
tion
2
for
a
description
of
the
self-test
state
and
Section
5
for
a
description
of
the
setup
state.
On-Line
Interactive
The
terminal
is
always
in
an
on-line
state
which
indicates
that
characters
are
transnitted
and/or
received
regardless
of
the
state
of
DSR
from
the
data
source.
When
DSR
is
high
(+12
Vdc),
an
"on"
indicator
with
the
underline
attribute
is
displayed
on
line
27
of
the
display
(between
F3
and
F4
screen-labels).
Receive
to
Display:
In
the
on-line
interactive
state,
.all
received
data
is
directed
to
the
screen.
Characters
may
be
displayed
as
double
wide
or
double
high
and
double
wide
(refer
to
Section
8)
and
may
be
smooth
or
jump
scrolled
vertically.
The
character
set
is
selectable
and
text
may
be
displayed
with
bold,
normal,
blink,
underline,
blank,
and/or
reverse
video
attributes.
A
blocked
or
underscored
cursor
marks
the
current
location
of
activity
and
may
be
solid,
blinking,
or
invisible.
If
the
CHECK
PARITY
option
is
"yes,"
parity
of
a
received
character
is
checked
according
to
the
SEND
PARITY
option.
The
substitute
(SB)
character
is
displayed
upon
reception
of
a
parity
error.
If
the
CHECK
PARITY
option
is
"no",
the
send
parity
option
is
set
to
"none",
or
the
terminal
has
MONITOR
MODE
option
"on,"
received
data
is
displayed
without
being
checked
for
parity.
Operations
Page
6-
1

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