Datasheet
US
7,099,934
B1
15
default
is
9600 BPS.
The
initialization
takes
place
at
a
user
selectable
data
rate,
With
no
parity,
8
data
bits,
and
one
stop
bit.
SET
MODEM
INITl,
INIT2, INIT3,
ATTENTION,
or
HANGUP
alloWs
an
individual
modem
initialization
string
to
be
enabled
(DEFAULT)
or disabled
(NONE).
All
default
to
enabled
(DEFAULT).
The
power
manager
initializes
the
modem
When
the
poWer
manager
is
?rst
turned
on,
Whenever
the
modem
is
turned
on
or
connected
and
after
every
user
session
(via
modern)
with
the
poWer
manager.
During
initialization,
the
poWer
manager
sends
each of
the
?ve-?xed
modem
initial
ization
strings
that
is
enabled
to
the
modem
in
the
order:
Attention
String:
@@@
Hang-up
String:
ATH<CR>
Initialization
String
1:
AT<CR>
Initialization
String
2:
AT
E0
Q1
S0=3
S2=64
Sl2=50
&Cl
&D2<CR>
Initialization
String
2:
AT
S0
=
l<CR>
The
Attention
String
is
sent
to
break
from
online
mode
to
command
mode
if
a
modem
is
connected.
The
attention
string
can
be
set
on most
modems
to
match
the
@@@
string
used
by
the
poWer
manager.
The
Hang-up
String
is
sent
to
cause
the
modem
to
hang
up
if
there
is
an
active
connection.
Initialization
String
1
is
sent
to
alter
the
modem
and
to
alloW
the
modem
time
to
prepare
for
the
next
command.
Initialization
String
2
is
sent
to
initialize
the
modem
to
defaults
required
by
the
poWer
manager.
The
“E0”
turns
off
the
echoing
of
data,
the
“Q1”
turns
off
result
codes
and
the
“S0:3”
sets
the
modem
to
ansWer
on
the
3rd
ring.
Initialization
String
3
is
sent
to
set
the
modem
to
ansWer
on
the
1“
ring.
The
modem
initialization
features
alloW
a
choice
for
the
modem
to
ansWer
on
either
ring
number
1
or
ring
number
3.
The
Initialization
String
3
is
“AT
S0:l<CR>”.
Like
the
other
initialization
strings,
Initializa
tion
String
3
defaults
to
being
enabled,
and
is
sent in
sequence
after
Initialization
String
2.
When
this
happens
the
modem
ansWers
on
ring
number
1.
To
have
the
modem
instead
ansWer
on
ring
number
3,
disable
Initialization
String
3
With
the
command
“SET
MODEM
INIT3
NONE”.
For
most
modems,
Initialization
String
1
or
2
being
sent
by
the
poWer
manager
to
the
modem
at
one
of
the
supported
data
rates
is
all
that
is
needed
for
the
modem
to
Work
With
the
poWer
manager.
This
is
because
most
modems
Will
communicate
to
the
attached
serial
device
(in
this
case,
the
poWer
manager)
at
the
data
rate
of
the
last
AT
command
that
Was
sent
to
it.
A
modem
that
operates
in
this
manner
is
operating
in
?xed
data
rate
mode.
Since
the
poWer
manager
sends
the
last
AT
command
at
one
of
its
supported
data
rates,
the
modem
Will
talk
back
to
the
poWer
manager
at
that
same
data
rate
When
it
is
on-line
With
another
modem.
Some
high-speed
modems,
hoWever,
can
be
con?gured
to
operate
in
variable
data
rate
mode.
With
a
modem
set
to
operate
in
variable
data
rate
mode,
When
the
modems
connect,
the
modem
may
change
from
the
speed
of
the
last
AT
command
to
a
different
data
rate,
automatically
adjusting
to
a
data
rate
that
is
best
for
the
actual
modem-to-modem
connect
speed.
If
the data
rate
changes
to
one
of
the
supported
data
rates,
then
the
poWer
manager
Commander
Will
be
able
to
communicate.
But,
if
the
data
rate
changes
to
a
non-supported
data
rate,
such
as
14400,
28800,
or
faster
than
38400
BPS,
the
poWer
manager
Commander
Will
not
be
20
25
30
35
40
45
50
55
60
65
16
able
to
communicate.
Thus,
it
is
best
that
the
modem
be
con?gured
to
operate
in
?xed
data
rate
mode,
NOT
variable
data
rate
mode.
Con?guring
the
modem
to
operate
in
?xed
data
rate
mode
is
not
addressed
by
the
modem
initialization
built
into
the
poWer
manager
Commander
because
the
command
that
sets
the
modem
to
use
?xed
data
rate
mode
varies
signi?cantly
With
different
modem
manufacturers.
If
the
modems
are
able
to
connect
With each
other,
but
there
is
not
communication
With
the
poWer
manager
Com
mander,
the
modem
attached
to
the
poWer
manager
is
probably
in
variable
data
rate
mode
and
has
sWitched
to
an
unsupported
speed. In
this
case,
in
the
modem’s
manual,
lookup
the
appropriate
AT
command(s)
for
the
modem
to
operate
in
?xed
data
rate
mode.
Then
attach
the
modem
to
a
PC
With
a
terminal
program, send
the
command(s)
to
the
modem,
folloWed
by
an
&W
to
Write
the
neW
setting
to
the
modem’
s
memory
and
make
it
the
default,
and
then
re-attach
the
modem
to
the
poWer
manager.
“SET
PANEL
{NONE|DEFAULT}”
changes
the
opera
tional
behavior
of
the
front
panel
pushbuttons.
NONE
dis
ables
the
pushbuttons.
DEFAULT
sets
the
front-panel
push
buttons
to
cycle
through
2-states
(ON
and
OFF)
for
non
ShutdoWn
ports,
and
three
states
(ON,
ShutdoWn,
and
OFF)
for
ShutdoWn
ports.
This
is
the
default
operating
mode
from
the
factory.
The
“DEFAULT”
option
supports
locking
a port
in
the
on
or
off
state
by
pressing
and
holding
the
port’s
pushbutton
for
tWo
seconds,
at
Which
point
the
LED
above
Will
?icker
rapidly.
If
the port
is
on,
this
action
Will
lock
the port
on.
If
the port
is
off,
this
action
Will
lock
the port
off.
To
unlock
a
port,
again
press
and
hold
the
port’s
pushbutton
for
tWo
seconds
is
a the
port
Will
stay in
the
same on
or
off
state,
it
Will
be
unlocked
again.
When
a
port
is
locked,
the
poWer
state
of
the
port
can
not
be
changed
remotely
by
a
user.
A
user
logged
in
With
the
“admn”
usemame,
hoWever,
can
lock
or
unlock
a port
remotely
from
the
PoWer
Control
Screen
by
positioning
the
cursor
in
the
column
of
the
target
port,
and
then
pressing
“L”
to
lock
or
“U”
to
unlock
the
port.
Regarding
“SET
PASSWORD
[username]”,
the
SET
PASSWORD
command
is
used
to
change
the
passWord
of
any
username.
A
user
may
specify a
usemame
for
Which
the
passWord
is
to
be
changed
as
a
parameter
to
the
SET
PASSWORD
command
or
he
may
enter
the
SET
PASS
WORD
command
With
no
parameters.
If
a
user
enters
the
SET
PASSWORD
command
Without
specifying
a
username,
the
system
Will
prompt
a
user
for
a
usemame
With
the
folloWing
prompt:
“Usemame:”.
If
a valid
usemame
is
not
speci?ed
either
as
a
parameter
on
the
SET
PASSWORD
command
or
in
response
to
the
“Usemame:”
prompt,
the
folloWing
message
is
displayed:
“Sorry,
a
username
a
user
has
entered
is
NOT
valid!”,
and
the
SET
PASSWORD
command
is
terminated.
If
a
user
enters
a valid
username
he
is
prompted
for
the
neW
passWord
and
also
for
a
veri?cation
of
the
neW
passWord.
A
user
must
specify the current
passWord
in
order
to
change
the
passWord
for
the
adminis
trator
username
(e.g.,
admn). For
all
other
usemames
the
passWord
is
changed
Without
having
to
?rst
specify the
existing
passWord.
The
passWord
can
not
contain
more
than
16
characters
or
the
command
is
aborted
With
the
folloWing
message:
“Sorry,
the
passWord
a
user
has
entered
is
NOT
valid!”.
The
folloWing
message
is
displayed
When
the
pass
Word
is
changed:
“PassWord
successfully
changed”.
The
poWer
manager
Will
echo
the
“*”
character
for
all
characters
entered
by
a
user
for
passWords
When
using
the
SET
PASSWORD
command.
This
includes
the
neW
pass