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What is the .TEL File Extension?

.TEL File Extension Description:

The TEL file extension identifies host files used by NCSA Telnet. The NCSA Telnet is an implementation of the Telnet protocol created in 1986 by the National Center for Supercomputing Applications (NCSA) at the University of Illinois. It is the very first implementation of Telnet for the Macintosh and PC that provided the ability to connect to multiple hosts simultaneously.

Generally, Telnet is an application that allows you to connect to an interactive session over TCP/IP networks such as the Internet. The commands that you enter from your own PC are executed precisely as if you were seated at the remote computer. Some machines necessitate the need of your own account for access, while others simply function as public archives where no unique login is required.

Running the Telnet application requires the following conditions: the local computer is connected to the network either directly or via a remote connection, the local computer supports the same protocol as the host computer, the TCP/IP protocol stack is enabled, and a file with the .tel file extension is present.

The file with the .tel file extension is a text file that is sourced each time the Telnet application is launched. It contains Telnet default settings such window attributes. There are two versions of a file with the .tel file extension: the first one is used only on Classic II machines, and the other one is used for all other machines. This file is located in the same folder as the Telnet application.

The file with the .tel file extension also contains configuration settings for the TCP/IP stack. It need not contain all the configuration options but the following has to be properly configured:

* Internet address - refers to the name of the Internet Protocol

* Subnet mask - often equivalent to

* Domain name - identifies one or more IP addresses

* Default variables

* Packet driver - used for sending and receiving data packets

* Adapter interrupt number

* FTP (File Transfer Protocol) - protocol for exchanging files

* RCP number

* Password file, if any

* IP of 1st nameserver

* IP of 1st gateway

Author: NCSA University of Illinois
Author URL:
Related Applications: NCSA Telnet
Common Path: N/A


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What Causes .TEL files Errors?

.TEL files errors are possibly critical Windows file system errors and are frequently caused because of a corrupted program registry that needs to be fixed immediately to protect against further damage in other applications and/or devices. Risks include system device damage, blue screen errors and fatal crashes.

What are the Symptoms of .TEL files Errors?

.TEL files errors produce many symptoms, including but not limited to: pc locks while shutting down or starting up, softwares lock up, reduced system performance, internal speaker beeps, problems saving files, slow system behaviour and failure while installing software.

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What is the .TEL File Extension?    |    Repair .TEL File Errors    |    How to Fix .TEL File Extension Errors