Advanced
186 IOLAN SDS/SCS/STS User’s Guide, Version 3.6
Advanced
Advanced Serial Settings Tab
Overview
Advanced serial por t setti n gs apply to all serial ports.
Field Descriptions
Configure the following parame ters:
Process Break
Signals Enables/disables proprietary inband SSH break signal processing, the Telnet
break signal, and the out-of-band break signals for TruePort.
Default: Disabled
Flush Data Before
Closing Serial Port When enabled, deletes any pending out bound data when a port is closed.
Default: Disabled
Deny Multiple
Network
Connections
Allows only one network conn ection at a time per a serial port. Application
accessing a serial port device across a network with get a connection (socket)
refused until:
zAll data from previous connections on that serial port has drained
zThere are no other connections
zUp to a 1 second interconnection poll timer has expired
This also enables a per-connection TCP keepalive feature. After approximately
3 minutes of network connection idle time, the connection will send a
gratuitous ACK to the network peer, thus either ensuring the connection stays
active OR causing a dropped connection condition to be recognized by all peer
network connections.
Applications using this feature need to be aware that there can be some
considerable delay between a network disconnection and the port being
available for the next connection attempt, allowing any data sent on prior
connections to be transmitted out of th e serial port. Appl ication network retry
logic needs to accommodate this feature.
Default: Disabled