User manual

33 EKI-1521/1522/1524 User Manual
Chapter 3 Configuration
 Data Listen Port: The TCP (UDP) port number represents the source port num-
ber, and the number is used to identify the channel for remote initiating connec-
tions. Range: 1024-65533. If an unknown caller wants to connect to the system
and asks for some services, they need to define the TCP (UDP) port to carry a
long-term conversation. Each node on a TCP/IP network has an IP address,
and each IP address allows connections on one or more TCP port. The well
known TCP ports are those that have been defined; for example, port 23 is used
for Telnet connections. There are also custom sockets for users and developers
to define specific needs. Each port has its own data listen port to accept con-
nected request of other network device. So, the data listen port can’t be set the
same value. You can transmit/receive data to/from device via the data listen
port.
 Command Listen Port: Each port has its own command listen port to accept
connected requests of other network device. Thus, the command listen port
can’t be set the same value. You can use ‘AT command’ to change the port set-
ting via the command listen port. The Command Listen Port must be different
from the Data Listen port.
 Enable Data Idle Timeout: The default is 60 seconds. You are allowed disabling
this function if you want to keep the connection working continuously. The data
idle timeout is the interval in which the device waits for data. If the EKI-1521/
1522/1524 does not receive data over an established idle time, the connection
will be disconnected temporarily, and then will be activated once the device
receives data.
 Protocol: TCP and UDP.
 Enable Time sharing: This function is the same with the Multi-Access function.
Please refer to the virtual COM operating mode setting.
 Peers to Receiving Data: You can set maximum sixteen network devices which
you want to connect. You need to fill out the IP Address and Port of network
devices which you want to connect.