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Accept UDP datagram from unlisted remote host
If
Accept unlisted (
Accept UDP datagram from unlisted remote host) function is set as ‘No’, Pro
Series will accept only incoming UDP datagram from the remote host(s) configured on
remote
host configuration
. On the contrary if
Accept unlisted
function is set as ‘Yes’, Pro Series will
accept all incoming UDP datagram regardless
remote host configuration.
Send to recent unlisted remote host
If
Send unlisted (
Send to recent unlisted remote host) function is set as ‘Yes’, Pro Series sends
data to the remote host, which has connected Pro Series recently. Recent unlisted remote host is
a remote host, which has accessed a corresponding serial port of Pro Series but is not configured
on
remote host configuration.
Surely, Pro Series also send data to the hosts, which are configured
on
remote host configuration.
If
Send unlisted
function is set as ‘No’, Pro Series sends data only
to the host(s) which are configured on
remote host configuration.
Pro Series maintains a recent
unlisted remote host during the
Inactivity Timeout
.
Inactivity Timeout
In UDP mode,
Inactivity Timeout
is used in maintaining recent unlisted remote host. If there is no
data transmission between unlisted remote host and serial port of Pro Series during
Inactivity
Timeout,
Pro Series will not send data from a serial port to the recent unlisted remote host again.
Namely,
Inactivity Timeout
in UDP mode is the time maintained recent unlisted remote host list by
Pro Series.
NOTE:
If user set
Inactivity Timeout
as 0 in UDP mode, Pro Series does not allow any new
connection from/to remote host if the number of current remote host exceeds
Max. allowed
connection
.
Socket ID
When many Pro Series devices connects a same remote host(s), sometimes it is needed to
identify the device. In this case,
Socket ID
is available for identification of each device. Pro Series
send the
Socket ID
string before starting the data transmission. User can define
Socket ID
with a
specific string. In UDP mode, specified
Socket ID
strings are added to the head of every packet.
4.2.3.3. Modem emulation mode
1) Operations
In modem emulation mode, the serial port process acts as if it is a modem attached to the serial
device. It accepts AT modem commands and answers to them, as modems would do. It also handles
the modem signals correctly. Modem emulation mode is useful in the following cases.
