Appendix
A
–
Upgrading
the
Modem’s
Firmware
3.
Look
at
the
firmware
version
number
for
your
modem.
4.
If
the
firmware
version
number
matches
the
firmware
version
number
found
in
“Identifying
the
Modem
Firmware”
you
have
the
current
firmware
version
and
do
not
need
to
be
update.
5.
If
the
firmware
version
number
is
greater
than
the
firmware
version
number
found
in
“Identifying
the
Modem
Firmware”
your
modem
has
an
older
firmware
version.
Continue
with
“Downloading
the
Upgrade
File.”
Warning:
The
first
digit
of
the
new
firmware
must
match
the
first
digit
of
the
old
firmware,
or
the
modem
may
not
work
properly;
e.g.,
if
your
current
firmware
version
is
4.16,
replace
it
only
with
4.xx
firmware,
not
6.xx
firmware.
Downloading
the
Upgrade
File
1.
If
you
are
not
already
at
the
MultiModem
ZBA
Firmware
page
of
the
Multi
‐
Tech
Web
site,
follow
the
procedure
in
“Identifying
the
Current
Firmware
Version.”
2.
Download
the
upgrade
file
for
your
modem
by
clicking
its
name,
and
save
the
file
in
a
temporary
folder
on
your
hard
disk.
3.
In
the
same
section
of
the
Web
page,
click
the
Flash
Wizard
utility
for
your
operating
system
to
download
it,
and
save
it
in
the
same
folder.
Extracting
the
Upgrade
Files
1.
Install
the
Flash
Wizard
utility
by
double
‐
clicking
the
file
name
in
Windows
Explorer.
2.
Extract
the
upgrade
files
by
double
‐
clicking
the
file
name.
The
extracted
files
include
a
.HEX
file,
which
contains
the
upgrade
data,
and
a
Readme
file.
3.
Copy
the
upgrade
.HEX
file
into
the
Flash
Wizard
folder,
which,
in
a
default
installation,
is
at
C:\Program
Files\MultiTech
Systems\Flash
Wizard\.
Clearing
Your
Stored
Parameters
Before
you
clear
your
modem’s
flash
memory,
record
the
parameters
that
are
currently
stored
so
you
can
reprogram
it
after
flashing.
After
you
have
recorded
them,
send
the
AT&W1Z
command
to
the
modem
to
clear
the
stored
parameters.
1.
Run
your
favorite
terminal
program.
2.
In
the
program’s
terminal
window,
type
AT&V
and
press
E
NTER
to
list
your
modem’s
current
parameters.
3.
Record
your
parameters
by
saving
the
screens
and
sending
them
to
your
printer.
4.
Type
AT&W1Z
and
press
E
NTER
to
clear
your
stored
parameters
and
reset
your
modem
to
factory
default.
5.
Close
the
terminal
program.
Upgrading
the
Modem’s
Firmware
Before
you
begin
the
following
procedure,
read
the
README.TXT
file
extracted
from
the
upgrade
archive
file.
Note
the
file
name
for
the
new
firmware
(example:
ARQG125A.HEX).
WARNING:
Never
install
an
older
version
of
firmware
over
a
newer
version.
Doing
this
WILL
DESTROY
THE
FLASH
PROM!
If
the
flash
PROM
is
destroyed,
the
modem
must
be
sent
in
for
repair.
1.
Run
Flash
Wizard
by
double
‐
clicking
its
icon
or
file
name,
or
by
selecting
it
from
the
Start
menu.
The
Identifying
Devices
dialog
box
is
displayed
as
Flash
Wizard
locates
and
identifies
the
devices
connected
to
your
system.
Multi
‐
Tech
Systems,
Inc.
MT9234ZBA
‐
Series
User
Guide
29
