Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
328
has
a
3G/LTE
WAN
interface
to
connect
to
the
Internet.
A
remote
Internet
host
computer
whose
IP
address
is
140.116.82.98
has
a
management
system
in
it
to
collect
the
serial
data
from
or
send
data
to
the
serial
device
via
the
gateway.
Please
be
noted
that
the
operation
mode
of
the
virtual
COM
function
in
the
gateway
is
"UDP".
The
Internet
Host
Computer
can
directly
send
UDP
data
to
the
serial
device
via
the
gateway,
and
also
receive
UDP
data
from
the
serial
device
via
the
game
at
the
same
time.
The
gateway
supports
up
to
4
Internet
host
computers.
Virtual
COM
Setting
Virtual
COM
setting
screen
enables
user
to
connect
a
Virtual
COM
port
based
device
to
the
Internet.
It
allows
user
to
access
serial
data
remotely.
There
are
TCP
Client,
TCP
Server,
UDP,
and
RFC2217
four
modes
of
remote
connections
available.
Once
completed
the
Virtual
COM
setting,
ensure
to
select
Virtual
COM
Operation
Mode
in
Port
Configuration
to
enable
it
for
the
serial
port.
Go
to
Advanced
Network
>
Communication
Bus
>
Port
Configuration
tab
Enable
TCP
Client
Mode
Go
to
Advanced
Network
>
Communication
Bus
>
Virtual
COM
tab
Configure
the
gateway
as
the
TCP
(Transmission
Control
Protocol)
Client.
In
TCP
Client
mode,
device
initiates
a
TCP
connection
with
a
TCP
server
when
there
is
data
to
transmit.
Device
disconnects
from
the
server
when
the
connection
is
Idle
for
a
specified
period.
You
may
also
enable
full
time
connection
with
the
TCP
server.
