Telefoonivõrgust

Telefoonivõrgust refers to a telephone network. It is a system of interconnected telephone exchanges and switching facilities that allows for voice communication between telephones. These networks can be public or private. Public switched telephone networks (PSTN) are operated by telecommunications companies and connect millions of users worldwide. Private branch exchanges (PBX) are typically used by businesses to manage internal and external calls.

The evolution of telephone networks has seen a significant shift from analog to digital technologies. Early networks relied on analog signals transmitted over copper wires. The advent of digital switching and fiber optic cables has dramatically increased capacity, speed, and reliability. Voice over Internet Protocol (VoIP) technology has further transformed communication, allowing voice calls to be transmitted over the internet, often at lower costs and with added features like video conferencing and instant messaging.

Modern telephone networks are complex infrastructures supporting various services beyond basic voice calls, including fax, data transmission, and emergency services. The infrastructure involves a vast array of equipment, from user-end devices like telephones and mobile phones to central office switches, routers, and transmission lines. The management and maintenance of these networks are crucial for ensuring consistent and reliable communication services for individuals and businesses globally. Security and privacy are also significant concerns within telephone network operations.