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The Telnet client may be used in debugging network services such as SMTP, IRC, HTTP, FTP or POP3, to issue commands to a server and examine the responses. [16] For example, Telnet client applications can establish an interactive TCP session to a port other than the Telnet server port.
Expect is used to automate control of interactive applications such as Telnet, FTP, passwd, fsck, rlogin, tip, SSH, and others. [3] Expect uses pseudo terminals (Unix) or emulates a console (Windows), starts the target program, and then communicates with it, just as a human would, via the terminal or console interface. [4]
A dictd server can be used from Telnet. For example, to connect to the DICT server on localhost, on a Unix system one can normally type: telnet localhost dict and then enter the command "help" to see the available commands. The standard dictd package also provides a "dict" command for command-line use. More sophisticated DICT clients include: cURL
Tera Term (alternatively TeraTerm) is an open-source, free, software implemented, terminal emulator (communications) program. It emulates different types of computer terminals, from DEC VT100 to DEC VT382.
Many computer protocols, such as telnet, include a NOP command that a client can issue to request a response from the server without requesting any other actions. Such a command can be used to ensure the connection is still alive or that the server is responsive. A NOOP command is part of the following protocols (this is a partial list): telnet ...
Input message - This is the command sent by the user or the OSS. Output/Response message - This is reply sent by the NE(Network Element) in response to an input message. Acknowledgment message - This is an acknowledgment of the receipt of a TL1 input message and is sent if the response message will be delayed by more than 2 seconds.
(The syntax in the above example would be valid for the command-line telnet client packaged with many operating systems, including most Unix operating systems, or available as an option or add-on.) In this example, 172.16.1.254 is the IP address of the console device, and 2002 is the TCP port associated with a terminal line on the server.
[1] [2] Once connected, a user can simply enter the commands to send a message to a pager connected to that network. For example, a PAGE command with the number of the device specifies the device to send the message to. The MESS command sets the text of the message to be sent to the text following it. The message is sent out by issuing the SEND ...