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Appendix
B/Modem
4P
Programming
Commands
The
following
is
a
list
of
commands
that
you
will
be
using
to
program
or
communicate
with the
Modem 4P
via
keyboard:
Opens
the
Modem
4P
for
Programming
This
command
forces the
modem
from
ari
Off-Line status
into
the
Command
Receptive
state
which prepares
the
modem
to
accept
commands
from
the
computer
The
*
can
be
used
in
several
places
in
the
modem
protocol.
At
initial
power-up, you
will
need
to
precede any
command
with
an
*.
If
used
while the
modem
is
wailing
for
a telephone
call
(waiting
for
the
phone
to
ring),
the
*
terminates Ihe
Answer
mode
and
will
not
be echoed,
but
the
TYPE
option
will
be
toggled
to
Manual, This
ensures
that
the
Modsm
is
not accidentally
tnlri
In
go
back
In
the
WAIT
FOR
CALL
mode.
If
the
*
command
is
used
white the
Modem
is
dialing
in
Autoj'
Originate
Mode,
the
*
will
not
be echoed
but the
Modem
will
stop
dialing
and
return to
the Qff-Line
mode.
To
return
the
Modem
to
the
command
receptive
state,
you
will
need
to
type another
*
(which
will
be
echoed),
23
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