26
Closed
Established
Listen
Data
Incoming TCP connection request
Inactivity time-out
Incoming TCP
disconnection request
Incoming I/O status data
Incoming data
from remote host
Sync-Recvd
Accept
Reject
Figure 3-6 State Transition Diagram of TCP Server mode
Listening TCP port
is the TCP port number through which remote host can connect a TCP
session, and, send and receive data. Incoming connection request to the ports other than
Listening TCP Port
will be rejected. The Rhio10 does not restrict the number to a specific range,
but it is strongly recommended not to use the well -known ports for certain application (See
Appendix D.
Well-known Port Numbers
). To change the port number, select menu 2 on the
TCP
Server
mode configuration screen.
Inactivity timeout
is set to maintain the TCP connection state as
Closed
or
Listen
in TCP host
mode unless there is any I/O data transfer between the I/O device and the Rhio10. If there is no
incoming or outgoing I/O data during the specified
inactivity timeout
interval, the existing TCP
connection will be closed automatically.
If the value of
inactivity timeout
is set to 0, the current TCP connection is maintained unless
