Dead Socket Connection; Telnet Connection - Keithley 2651A Reference Manual

High power system sourcemeter instrument

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Model 2651A High Power System SourceMeter® Instrument Reference Manual

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 reboots 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 will be terminated and closed when the connection to the dead socket

termination port is closed.

Telnet is similar to raw socket and is used when the user needs to interact directly with the

instrument, typically for debugging and troubleshooting. Telnet requires a separate telnet program.

The Model 2651A supports the Telnet protocol that you can use over a TCP/IP connection to issue

commands to the instrument. You can use a Telnet connection to interact with scripts or issue

commands in real-time.

Configuring a Telnet connection

This procedure uses HyperTerminal, which is available with the Microsoft

system. Consult the help system for your version of Microsoft Windows to identify a compatible tool.

To connect with the Model 2651A using HyperTerminal on a Windows XP system:

1. On the host computer, click Start > Accessories > Communications > HyperTerminal. The

Connection Description dialog box will open.

2651A-901-01 Rev. A / March 2011

Figure 124: Connection description dialog box

My Instrument

Appendix C: LAN concepts and settings

XP operating