Wake-Up Command - Tandy DCM212 Operation Manual

Tandy
protocol
reference
A
Wake-up
command
At
the
initial
power-up
or
after
breaking connection with
the telephone
line,
the
Modem
enters
an
OFF-LINE
{or waiting)
mode
and
remains
in
this
mode
until
you
tell
(command)
it
what
to
do
next.
The
wake-up
command
opens
the
DCM
212
for
programming and
pre-
cedes
any
command
issued
to
the
Modem
while
it is
in the
command
receptive
state.
This
is
the only
command
the
DCM
212
will
respond
to
while
in
OFF-LINE mode
{from
power-up).
It
forces
the
Modem
from
the
off-line status
to the
command
receptive
state
(CRS).
To
send
the
wake-up
command
from
your computer or
terminal
key-
board,
press
Q Q
.
The
screen echoes:
You may
have noticed that the
*
did not echo
until
you
pressed
Q
.
That's because both
keys
are
needed
to
determine
the
speed
in
bits
per
second.
When
the
correct
speed
is
detected,
the character
*
(HEX
*2A')
is
output.
The
Modem
is
now
in the
command
receptive
state
and
is
waiting
for
you
to
begin programming
or
setting
the
internal switches that
will
tell
it
what
operations
are to be performed.
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