4RF Aprisa LTE, User Manual

Page: 101 / 248

Managing the LTE | 101
Aprisa LTE User Manual 2.1
TERMINAL SERVER SETTINGS
Protocol
This parameter sets the L4 TCP/IP or UDP/IP protocol used for terminal server operation. The default setting
is TCP.
Mode
This parameter defines the mode of operation of the terminal server connection. The default setting is
Client and Server.
Option Function
Client The LTE will attempt to establish a TCP connection with the
specified remote address when data is presented on the serial
port.
Server The LTE will listen for a TCP connection on the specified local
port.
Data received from any client shall be forwarded to the associated
serial port while data received from that serial port shall be
forwarded to every client with an open TCP connection.
If no existing TCP connections exist, all data received from the
associated serial port shall be discarded.
Client and Server The LTE will listen for a TCP connection on the specified local port
and if necessary, establish a TCP connection with the specified
remote unit.
Data received from any client shall be forwarded to the associated
serial port while data received from that serial port shall be
forwarded to every client with an open TCP connection.
Inactivity Timeout (seconds)
This specifies the duration (in seconds) to automatically terminate the connection with the remote TCP
server if no data has been received from either the remote TCP server or its associated serial port for the
duration of the configured inactivity time.
TCP Keep Alive
A TCP keep alive is a message sent by one device to another to check that the link between the two is
operating, or to prevent the link from being broken.
If the TCP keep alive is enabled, the LTE will be notified if the TCP connection fails.
If the TCP keep alive is disabled, the LTE relies on the Inactivity Timeout to detect a TCP connection failure.
The default setting is disabled.
Note: An active TCP keep alive will generate a small amount of extra network traffic.