Nexus Terminal

The architecture of Nexus Terminal is designed for efficient and secure access to mainframe and midrange systems. The main components include the Terminal Client, Connection Manager, Scripting Engine, and Security Module. The Terminal Client provides the user interface and handles user input, rendering the terminal display and managing keyboard input.

The Connection Manager is responsible for establishing and maintaining connections to host systems using protocols such as TN3270, TN5250, and VT*. It manages the TCP/IP connections and handles the protocol-specific communication. The Scripting Engine allows for automation of tasks through a built-in scripting language.

Users can create scripts to automate login sequences, data entry, and other interactions with the host systems. The Security Module handles authentication and encryption. It supports user ID and password authentication.

The application uses a configuration file to store connection profiles, display preferences, keyboard mappings, and security settings. Communication occurs over TCP/IP for TN3270 and TN5250 connections. The application does not use any specific database or storage mechanism for its core functionality, relying on configuration files and in-memory data for session management.

The application listens on standard ports for TN3270 (port 23) and TN5250 (port 23) connections. The scripting engine supports commands like `Connect`, `Send`, `Enter`, and `Wait`. 100 port=23; Send 'username'; Send 'password'; Enter; Wait '>'; Send 'command';`.

The application distinguishes itself from competitors by offering a robust scripting engine and a focus on secure connections.