Tandy 1400 LT User Manual page 27

Introduction
to
Modem
Operation
The
default
escape code
is
entered
as
followed:
Wait
at least
one second
after
the
last
character entered.
Enter:
+++
Wait
at least
one second
for
the
result
code.
The
modem
will
return
to local
state
and
respond
with the
result
code
OK.
NOTE:
The
result
code
will
be returned only
if
the options
QO
and
VI
are
set.
The
purpose
of the guard time
(the
one second
delay
around
the
+++)
is
to
prevent the
modem
from
accidentally escaping
into
command mode
during
normal
operation.
The
one-second
guard
time surrounding
the
escape code
tells
the
modem
that
"+++"
is
a
command
to
the
modem,
not
just
a
stream
of data.
The
default values of the
escape
code
and
the guard time
may
be
changed
(Registers
S2
and
S12).
The
escape code must be
a single
character entered three times
and surrounded by
a
designated pe-
riod of time.
If
you
are
in
auto-answer mode,
it
is
advisable
to
disable the escape
code
or
set
it
to a different value
from
that of
the
originating
modem
(See
Register
S2
for instructions).
That
way, your
modem
will
not
be
accidentally
put
into local
command
state
by
the distant
modem.
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