CSE-H53 User
’
s Manual Ver. 1.7
- 23 -
http://www.ezTCP.com
5
Communication Modes
5.1
TCP Server
In this mode, CSE-H53 functions as a TCP server. CSE-H53 listens to a TCP connection
from remote host. Once a host tries to connect to CSE-H53, it responses that request. After
the connection is established, CSE-H53 converts the raw data from the serial port to TCP/IP
data and sends them to the network and vice versa.
5.1.1 Key parameters
Local Port
This is a server’s port number which is used in the TCP connection.
Event Byte
With setting event bytes, users can handle the serial data before a TCP connection is
established.
Value
Description
0
CSE-H53 doesn’t send the data
Otherwise
(512 or under)
CSE-H53 sends the data right after a connection is established.
512 or under bytes are strongly recommended.
Table 5-1 Event Byte
Timeout
If there is no transmission of data for amount of time which is set to this parameter,
CSE-H53 tries to terminate established TCP connection.
Notify IP Change
This function is for notifying information about changed IP address to a server. Not
only the TCP/UDP protocol but Dynamic Domain Name Service (DDNS) can be used.
Restriction of Access
Users can block TCP connections from unauthorized hosts by using this option. Both
IP and MAC address are available.
