OnCell G3100 Series
Configuring Serial Port Operation Modes
8-9
Socket Applications
TCP Server Mode
TCP alive check time
(default=7 min): This field specifies how long the OnCell G3100 will wait for a response
to “keep alive” packets before closing the TCP connection. The OnCell G3100 checks connection status by
sending periodic “keep alive” packets. If the remote host does not respond to the packet within the time
specified in this field, the OnCell G3100 will force the existing TCP connection to close. For socket and device
control modes, the OnCell G3100 will listen for another TCP connection from another host after closing the
connection. If
TCP alive check time
is set to
0,
the TCP connection will remain open even if there is no
response to the “keep alive” packets.
ATTENTION
You should make sure the inactivity time value used here is less than the inactivity time value on the
GSM/GPRS configuration page. The GSM/GPRS connection must be maintained in order to achieve the
inactivity time behavior of the TCP connection.
Inactivity time
(default=0 ms): This field specifies how long the OnCell G3100 will wait for incoming and
outgoing data through the serial port before closing the TCP connection. The TCP connection is closed if there
is no incoming or outgoing data through the serial port for the specified
Inactivity time
. If this field is set to
0
, the TCP connection is kept active until a connection close request is received.
ATTENTION
If used, the
Inactivity time
setting should be greater than the
Force transmit
time. To prevent the
unintended loss of data due to the session being disconnected, it is highly recommended that this value is set
large enough so that the intended data transfer is completed.
