SENA PS810 - Manual (Page 45)

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2) Operations
 Serial data transfer
Whenever the serial device sends data through the serial port of the Pro Series, data will be
accumulated on the serial port buffer of the Pro Series. If the buffer is full or the time gap reaches the
inter-character timeout (See Options in section 4.2.6. Serial Port Parameters for details on inter-
character timeout), the Pro Series connect to the registered remote host(s). If a TCP session has not
been established yet and the Pro Series succeeds in connecting to the remote host, the data in the
serial port buffer will be transferred to the host. Otherwise, all the data stored in the buffer will be
cleared.
 Session disconnection
The connected session will be disconnected when the remote host sends disconnection request or
when no data transfer activity is found through the serial port for certain amount of time, which is
“Inactivity timeout”. All the data remained in the serial port buffer will be cleared when it is
disconnected.
 Connection request from remote host
All the incoming TCP connection requests will be rejected in TCP client mode.
3) Parameters
 TCP listening port
This is the TCP port number through which a remote host can connect a TCP session, and, send and
receive data. Incoming connection request(s) to the ports other than TCP Listening Port will be
rejected. The Pro Series does restrict the port number from 1024 to 65535 and if it is set as 0 only
outgoing connection is permitted. (TCP server mode)
 User authentication
If the User authentication option is enabled, the user can access the port after entering the correct
user ID and password. Please refer to the section 5.9. User Administration for details of user
management.
 Telnet protocol
In TCP mode, Pro Series supports Telnet Com Port Control Option (RFC2217 compliant) so that user
can control serial parameters like baud rate, data bits and flow control option using his local RFC2217-
compliant Telnet client program. (Please refer to section 4.2.6. Serial Port Parameters for more detail
information about serial parameters)
Usually this option is used with the RFC2217-compliant COM port redirector so that user can control
parameters of serial ports of Pro Series using his serial port application program.