Telecommunication cables are essential components used to transmit data, voice, and video signals over long distances. These cables can be made of copper or fiber optic materials, with fiber optic cables offering higher speeds and greater bandwidth due to their ability to carry light signals. These cables connect various devices, such as telephones, computers, and internet routers, enabling communication and data exchange. They are commonly found underground or overhead, forming the backbone of modern communication networks, including telephone systems and internet services.