Avenview RTERM Series - Manual (Page 55)

www.avenview.com 55
Protocol
Select Telnet, SSH or Raw TCP as the protocol. If the users are using a Telnet client program, select Telnet. If the
users are using an SSH client program, select SSH. When Raw TCP is selected, direct TCP socket communication
is available between the IPCS and the remote host.
Inactivity timeout
In order to avoid a client holding a TCP connection while no data transferring on the serial port for long time. If
the inactivity timeout is enabled, and no data activity between the IP serial console and the Telnet/ SSH client
for the specified inactivity timeout interval (no data activity in the serial port), the existing TCP session will
automatically be closed. If the user wants to maintain the connection indefinitely, configure the inactivity
timeout period to 0.
TCP Keep-alive (no configuration required)
In order to avoid TCP connection lockup, the IP serial console will continue to check the connection status
between the Telnet/ SSH client and the IP serial console by sending “keep alive” packets periodically. If the
Telnet/ SSH client does not answer the packets in a period of time, system will assume that the connection is
down unintentionally. The IPCS will close the existing Telnet/SSH connection, regardless of the inactivity setting.
So the TCP connection won’t be deadlocked when user’s application closed improperly or the network link
interrupted.
Terminal Server Mode
In terminal server mode, the IP serial console will unit’s serial port is configured to wait for data from the device
connected to the port. If data arrive is detected, the IPCS unit starts a TCP session as a Telnet or SSH client to a
pre-defined server. The server must be defined by you before the port can be configured for a Telnet or SSH
client.
This mode is used when you want to access servers on the network from a serial terminal. RawTCP is also
supported with the Terminal Server Mode.
Dial-in Modem Mode
In this mode, the IP serial console unit assumes an external modem is attached to the serial port and is waiting
for a dial-in connection from a remote site. When a user dials-in using a terminal application, the IP serial
console unit accepts the connection and displays the appropriate prompt or menu for you that logged in.