Telephone Exchange Relay is an electromechanical switching device historically used in telephone exchanges and communication systems. These relays play a vital role in connecting calls by routing electrical signals through circuits. Built with precision and durability, telephone exchange relays are made from high-quality metals such as copper, silver, and sometimes even gold contacts to ensure long-lasting conductivity. Although modern telecommunications now rely on digital switching, telephone exchange relays remain valuable due to their collectible, historic, and recycling potential.