Rev 1.9.1 Feb.09
Proprietary and Confidential
81
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Note: To power-off the module,
drive W_Disable# low for the
required minimum period. See
on
for details.
2.
Ensure
that
the
module
is
turned
off
before
beginning
your
tests
(set
W_Disable#
low).
3.
If
using
Linux,
determine
if
any
USB
devices
are
currently
connected
to
the
computer:
a.
Open
a
shell
window
and
enter
the
command
ls /dev/
tty/USB*
.
b.
Record
the
ttyUSB
n
values
that
are
returned;
these
are
the
currently
connected
USB
devices.
If
the
command
returns
“no
such
file
or
directory”,
there
are
no
devices
currently
connected.
4.
Test
W_Disable#
—Turn
on
the
module
by
letting
W_Disable#
float
(high
impedance).
Depending
on
your
device,
this
may
just
require
powering
up
the
device.
Refer
to
the
PCI
Express
Mini
Card
Dev
Kit
Quick
Start
Guide
(Document
2130705)
for
more
details.
5.
Test
USB
functionality—Check
for
USB
enumeration.
·
(Windows
systems)
The
Device
Manager
shows
Sierra
Wireless
items
under
the
Ports
‐
(COM
&
LPT)
entry.
The
devices
shown
depend
on
the
module
type.
For
example:
·
MC87xx
·
MC57xx
·
(Linux
systems)
Enter
the
command
ls /dev/tty/USB*
and
then
record
and
compare
the
results
with
those
from
Step
3.
If
there
are
any
new
ttyUSB
n
devices,
then
the
modem
has
enumerated
successfully.
(There
should
be
three
or
seven
new
devices,
depending
on
the
module
type.)
For
example: