Perle Systems 5500161-40 ユーザーズマニュアル

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Advanced

Advanced serial port settings apply to all serial ports. 

Configure the following parameters:

Enables/disables proprietary inband SSH break signal processing, the Telnet 
break signal, and the out-of-band break signals for TruePort.

Default: Disabled

When enabled, deletes any pending outbound data when a port is closed.

Default: Disabled

Allows only one network connection at a time per a serial port. Application 
accessing a serial port device across a network with get a connection (socket) 
refused until:

z

All data from previous connections on that serial port has drained

z

There are no other connections

z

Up 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 the serial port. Application network retry 
logic needs to accommodate this feature. 

Default: Disabled