Chapter
5
–
Callback
Security
3.
Type
one
of
the
following
commands:
●
To
turn
off
callback
security:
Type
AT#CBS0
and
press
E
NTER
.
Callers
no
longer
need
a
password
to
connect
to
the
modem,
the
modem
is
unable
to
call
them
back,
and
the
stored
dialing
command
locations
0–3
become
available.
●
To
turn
on
both
local
and
remote
callback
security:
Type
AT#CBS1
.
Press
E
NTER
.
With
local
security
turned
on,
you
must
enter
the
setup
password
before
you
can
enter
any
AT
command
except
the
AT
,
ATI
n
,
and
AT#S
xxxxxxxx
commands.
For
a
description
of
remote
callback
security,
see
the
following
paragraph.
●
To
turn
on
remote
callback
security
only:
Type
AT#CBS2
and
press
E
NTER
.
With
remote
callback
security
turned
on,
each
caller
is
asked
to
enter
a
password,
is
called
back,
and
then
is
asked
to
enter
the
password
again
before
a
connection
can
be
made.
Also,
dialing
command
locations
0–3
for
use
with
the
DS=
y
dialing
command
are
replaced
by
callback
dialing
command
locations
0–29.
●
To
temporarily
disable
callback
security
if
the
modem
is
set
to
#CBS1
or
#CBS2
(for
instance,
to
call
another
modem):
Type
AT#CBS3
and
press
E
NTER
.
The
modem
returns
to
its
original
setting
when
you
issue
the
hangup
command
(
+++ATH
)
or
the
modem
is
reset.
Note
that
if
a
remote
modem
breaks
the
connection,
callback
security
remains
disabled.
Setting
Callback
Security
Message
Parity
The
modem’s
password
prompt
and
messages
parity
must
match
the
parity
of
the
computer
to
which
the
modem
is
connected.
1.
Open
a
data
communications
program
such
as
HyperTerminal.
2.
In
the
terminal
window,
type
AT#S
xxxxxxxx
,
where
xxxxxxxx
is
your
password.
Press
E
NTER
.
The
modem
responds
with
OK
if
the
setup
password
is
correct
and
ERROR
if
it
is
wrong.
3.
The
modem’s
parity
default
value
is
No
parity
(
AT#CBP0
).
To
change
the
modem’s
default
to
use
even
parity,
type
AT#CBP2
.
Press
E
NTER
.
For
odd
parity,
type
AT#CBP1
.
Press
E
NTER
.
4.
To
store
the
new
parity
value,
type
AT&W
.
Press
E
NTER
.
Assigning
Callback
Passwords
and
Phone
Numbers
1.
Open
a
data
communications
program
such
as
HyperTerminal.
2.
In
the
terminal
window,
type
AT#S
xxxxxxxx
,
where
xxxxxxxx
is
your
password.
Press
E
NTER
.
The
modem
responds
with
OK
if
the
setup
password
is
correct
and
ERROR
if
it
is
wrong.
3.
Enable
callback
security
by
typing
AT#CBS1
or
AT#CBS2
and
pressing
E
NTER
.
4.
To
store
a
callback
password
for
the
first
callback
memory
location,
type
AT#CBN0=
xxxxxxxx
,
where
xxxxxxxx
is
the
first
password.
Press
E
NTER
.
The
password
must
be
unique,
must
be
six
to
eight
characters
in
length,
and
must
not
contain
a
+
or
‐
character.
5.
To
store
a
callback
password
for
the
second
callback
memory
location,
type
AT#CBN1=
xxxxxxxx
,
where
xxxxxxxx
is
the
second
password.
Press
E
NTER
.
Note
that
the
memory
location
number
in
the
command
is
incremented
by
one.
6.
Repeat
as
many
times
as
necessary,
up
to
memory
location
29,
until
all
passwords
are
entered.
Multi
‐
Tech
Systems,
Inc.
MT9234ZBA
‐
Series
User
Guide
19
