MTX
‐
3G
‐
JAVA
Family
www.mtx
‐
terminals.com
www.mtxm2m.com
2015/10
v1.6
Page
78
/
109
MTX
M2M®
by
MATRIX
ELECTRONICA
S.L.U
6.
AT
command
interpreter
After
a
successful
installation
of
the
EHS6
driver
package,
the
physical
USB
interface
of
the
modem
is
represented
in
the
operating
system
by
two
virtual
interfaces,
each
assigned
to
a
virtual
COM
port
of
its
own:
‐
Modem
interface:
This
interface
is
referred
to
as
"Modem"
if
queried
using
the
AT^SQPORT
command.
In
the
quick
reference
tables
it
is
named
USB0
‐
MDM.
The
Modem
interface
is
intended
particularly
for
data
transmission
(UMTS
or
GPRS).
All
URCs
are
normally
issued
on
the
Application
interface.
URCs
related
to
data
calls
(RING,
NO
CARRIER)
as
well
as
the
"^SYSSTART"
URC
are
issued
on
the
Modem
interface.
‐
Application
interface:
This
interface
is
referred
to
as
"Application"
if
queried
using
the
AT^SQPORT
command.
In
the
quick
reference
tables
it
is
named
USB0
‐
APP.
The
Application
interface
is
designed
especially
for
controlling
the
MTX
‐
3G
‐
JAVA,
i.e.
for
entering
AT
commands,
receiving
URCs,
or
sending
and
receiving
short
messages.
It
cannot
be
used
as
a
data
interface
for
UMTS,
or
GPRS.
Please
note
that
URCs
are
normally
indicated
only
on
this
interface,
no
matter
whether
the
Modem
interface
or
the
Application
interface
was
used
to
send
the
AT
commands
to
activate
their
presentation.
This
URC
management
scheme
is
the
default
configuration
recommended
for
a
typical
MTX
‐
3G
‐
JAVA
application.
Bear
in
mind
that
the
Modem
interface
and
the
Application
interface
are
handled
by
the
same
AT
command
interpreter.
As
a
result,
AT
commands
entered
on
both
interfaces
are
not
executed
in
parallel
but
sequentially,
one
after
the
other.
So,
an
AT
command
issued
on
one
interface
will
be
buffered
on
this
interface
to
be
executed
after
the
other
interface
has
completed
processing
earlier
AT
command(s).
When
a
data
connection
is
established
over
the
Modem
interface,
the
Application
interface
can
be
used
simultaneously
for
any
control
functions.
This
eliminates
the
need
for
the
user
to
enter
AT
commands,
such
as
+++
and
ATO,
as
well
as
switching
back
and
forth
between
command
and
online
mode
when
working
on
one
interface
only.
See
the
MTX
‐
3G
‐
JAVA
Quick
Start
guide
for
a
complete
step
by
step
installation
process.