Tektronix Keithley 2651A Reference Manual page 877

Section 13: LAN concepts and settings
Dead socket connection
The dead socket termination (DST) port is used to terminate all existing ethernet connections. A dead
socket is a socket that is held open by the instrument because it has not been properly closed. This
most often happens when the host computer is turned off or restarted without first closing the socket.
This port cannot be used for command and control functions.
Use the dead socket termination port to manually disconnect a dead session on any open socket. All
existing ethernet connections are terminated and closed when the connection to the dead socket
termination port is closed.
Telnet connection
The Telnet protocol is similar to raw socket and can be used when you need to interact directly with
the instrument. Telnet is often used for debugging and troubleshooting. You need a separate Telnet
program to use this protocol.
The Model 2651A supports the Telnet protocol, which you can use over a TCP/IP connection to send
commands to the instrument. You can use a Telnet connection to interact with scripts or send
real-time commands.
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Model 2651A High Power System SourceMeter® Instrument Reference Manual
2651A-901-01 Rev. C October 2021