General-purpose transceivers are not a specific brand but a category of communication devices used across various industries. These transceivers are manufactured by multiple companies worldwide, including prominent names like Siemens (Germany), Honeywell (USA), and Mitsubishi Electric (Japan). They serve industries such as industrial automation, telecommunications, and transportation, providing reliable data transmission for applications like PLC systems, radio communications, and IoT devices. Key products include modular transceivers, embedded transceivers, and wireless transceivers, designed for versatility and interoperability in harsh environments.