Panasonic FP2 ET-LAN Technical Manual page 73

Fullpassive open (Passive connection open)
The system is waiting for data to be received from a given partner node, in order to establish a
connection. In the Fullpassive open method, the IP address and port number of the partner node are
specified, and then the system waits for reception.
Unpassive open (Passive connection open)
The system is waiting for data to be received from an unspecified partner node, in order to establish a
connection. In the Unpassive open method, the connection information concerning the partner node
should be read and confirmed when a connection has been opened.
6-5