User's Manual

001-5008-000 rev5_2.doc Page 56
 TCP Keepalive
The TCP Keepalive feature will transmit a short Keepalive message to test the TCP
connection if there is no data transferred through an open TCP connection after X number of
minutes. If the keepalive message is received successfully by the remote endpoint the TCP
connection will remain open. If the keepalive message is not received successfully the ViPR
will close the existing TCP connection.
To disable this feature, set the TCP Keepalive to "0". With the TCP Keepalive feature
disabled, the ViPR will leave the TCP connection open indefinitely. An existing TCP
connection will only close if the remote endpoint closes the connection, the ViPR's serial port
is disabled, or if the ViPR is unable to successfully communicate with the remote endpoint
during a data transmission.
6.4.4 RTS/CTS Mode Settings
 CTS Assertion Delay
The time in milliseconds the data will be delayed after the CTS has been sent.
 CTS Negation Delay
The time in milliseconds the CTS will be kept asserted after the last character has been
transmitted.
 Send all buffered data before negating CTS
All the data will be sent before the ViPR drops the CTS control line.
 Fragment large messages
Allows the user's data to be fragmented into smaller messages.
 Discard all buffered data when entering flow control
The data in the serial port buffer will be discarded and only new data will be processed
under the flow control.