SENA SS800 - Manual (Page 50)

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enabled through this option.
4.2.4.2. UDP Mode
The UDP mode operation is similar to that of TCP mode except that it is based on UDP protocol and
only one pre-defined remote host is able to communicate with the Super Series. Users do not have to
configure cyclic connection, since UDP is a connectionless protocol.
1) Operations
If a remote host sends a UDP datagram to the one of UDP Local port of the Super Series, Super
Series first checks whether it is from one of the hosts configured on remote host configuration. If the
remote host is one of the hosts configured on remote host configuration, then Super Series transfers
the data through the serial port. Otherwise, the Super Series discards the incoming UDP datagram.
But user can force Super Series accept all incoming UDP datagram regardless remote host
configuration by setting Accept UDP datagram from unlisted remote host parameter as ‘Yes’. If there is
any incoming data from the serial port, the Super Series transfers the data to the remote host defined
on remote host configuration. If the remote port is not opened, the Super Series will not transfer the
data.
2) Parameters
 UDP receiving port
The concept is the same as TCP listening port. See parameters in the section 4.2.4.1. TCP Mode for
details.
 Max. allowed connection
The concept is the same as that of TCP communication. See parameters in the section 4.2.4.1. TCP
Mode for details.
 Accept UDP datagram from unlisted remote host
If Accept UDP datagram from unlisted remote host function is set as ‘No’, Super Series will accept
only incoming UDP datagram from the remote host(s) configured on remote host configuration. On the
contrary if Accept UDP datagram from unlisted remote host function is set as ‘Yes’, Super Series will
accept all incoming UDP datagram regardless remote host configuration.
 Send to recent unlisted remote host
If Send to recent unlisted remote host function is set as ‘Yes’, Super Series sends data to the remote
host, which has connected Super Series recently. Recent unlisted remote host is a remote host, which
has accessed a corresponding serial port of Super Series but is not configured on remote host
configuration. Surely, Super Series also send data to the hosts, which are configured on remote host